Browse All 500 Free Browser Tools

.editorconfig Generator

Build an .editorconfig file in seconds.

Web & Dev

.env to JSON Parser

Parse a .env file into clean JSON.

JSON & Data

.gitignore Generator

Combine ignore templates for your stack and tools.

Web & Dev

Acceleration Converter

Convert g, m/s², ft/s² and more.

Converters & Calculators

Accessible Color Pair Finder

Check WCAG contrast and fix failing pairs.

Color & Design

Add or Subtract Days

Shift a date by days, weeks, months or years.

Date & Time

Add Page Numbers

Stamp page numbers onto any PDF, in your browser.

PDF

Adler-32 Checksum

Compute the zlib Adler-32 checksum of text or hex.

Encode / Decode

AES Text Decryptor

Decrypt AES-256-GCM text with your password.

Security & Validation

AES Text Encryptor

Encrypt and decrypt text with AES-256-GCM.

Security & Validation

Age Calculator

Exact age in years, months, days and totals.

Converters & Calculators

Age in Days Weeks Months

See any age as years, months, days, weeks and hours.

Date & Time

Anagram & Palindrome Checker

Check if text is a palindrome or two words are anagrams.

Text

Analogous Color Scheme

Build harmonious analogous palettes from one colour.

Color & Design

Angle Converter

Convert degrees, radians, gradians and more.

Converters & Calculators

Annuity Calculator

Solve annuity payment, future value or present value.

Finance

Area Calculator

Area and perimeter for six common shapes.

Math & Numbers

ASCII Table Reference

Searchable ASCII table with dec, hex, oct and binary.

Web & Dev

Ascii85 Encoder Decoder

Encode and decode Ascii85 (Base85) text.

Encode / Decode

Aspect Ratio Calculator

Simplify ratios and find missing dimensions.

Converters & Calculators

Atbash Cipher

Encode and decode text with the mirror-alphabet cipher.

Encode / Decode

Auto Loan Calculator

Estimate car payments with tax, trade-in and down payment.

Finance

Average Calculator

Mean, median, mode and range in one click.

Math & Numbers

Bacon Cipher

Encode and decode Francis Bacon’s A/B cipher.

Encode / Decode

Barcode Generator

Make a Code 128 barcode and download it as SVG.

Generators

Base32 Encode / Decode

Encode and decode Base32 (RFC 4648).

Encode / Decode

Base58 Encoder Decoder

Encode and decode Base58 (Bitcoin/IPFS alphabet).

Encode / Decode

Base64 Encode / Decode

Encode and decode Base64, UTF-8 safe.

Encode / Decode

Base64 to Hex

Decode Base64 and view the bytes as hexadecimal.

Encode / Decode

Base64 to Image

Decode a base64 string back into a viewable image.

Image

Base91 Encoder Decoder

Encode and decode basE91, denser than Base64.

Encode / Decode

Batch Resize / Rename

Resize and rename many images at once, in your browser.

Image

Battery Status Viewer

Live charge level and time remaining.

Utilities

Binary to Decimal Converter

Turn binary into decimal instantly.

Encode / Decode

Bionic Reading Converter

Bold word beginnings to read faster.

Text

Blood Alcohol Calculator

Estimate your BAC with the Widmark formula.

Health & Fitness

BMI Calculator

Body Mass Index from weight and height.

Converters & Calculators

BMR Calculator

Estimate resting calories burned per day.

Health & Fitness

Body Fat Percentage Calculator

Estimate body fat from tape measurements.

Health & Fitness

Body Surface Area Calculator

Estimate body surface area with four formulas.

Health & Fitness

Bold Unicode Text

Make 𝗯𝗼𝗹𝗱 text that works anywhere.

Text

Break-Even Calculator

Find the units and revenue you need to break even.

Finance

Brightness and Contrast Adjuster

Fine-tune photo brightness and contrast in your browser.

Image

Browser Info Viewer

Inspect your browser, OS and environment.

Utilities

Business Days Calculator

Count working days between two dates.

Date & Time

Caesar Cipher

Encrypt and decrypt text with a shift cipher.

Encode / Decode

CAGR Calculator

Compute the compound annual growth rate.

Finance

Calendar Generator

Build a printable month calendar for any year.

Date & Time

Calories Burned Calculator

Estimate calories burned from activity and time.

Health & Fitness

Case Converter

camelCase, snake_case, kebab, Title & more.

Text

Character Frequency Counter

Tally how often each character appears in text.

Text

Chinese Zodiac Finder

Find your Chinese zodiac animal and element by year.

Date & Time

Chmod Calculator

Build Unix file permissions visually.

Web & Dev

CIDR / Subnet Calculator

Work out network, broadcast and host range from a CIDR.

Utilities

Circle Calculator

Find radius, diameter, circumference and area.

Math & Numbers

Circle-crop Avatar

Crop any photo into a round avatar with transparency.

Image

Clipboard Inspector

Inspect what you just copied: type, size, counts.

Utilities

Clothing Size Converter

Convert clothing sizes between US, UK, EU and IT.

Converters & Calculators

CMYK to RGB Converter

Turn print CMYK ink values into screen RGB and hex.

Color & Design

Coin Counter

Tally a jar of coins to an exact total.

Converters & Calculators

Coin Flip

Flip a virtual coin once or thousands of times.

Generators

Color Blindness Simulator

See your colour through colour-blind eyes.

Color & Design

Color Contrast Quick Check

Instant WCAG pass/fail for any text & background.

Utilities

Color Format Converter

Convert between HEX, RGB and HSL instantly.

Color & Design

Color Mixer

Blend two hex colours at any ratio.

Color & Design

Color Palette Generator

Build harmonious palettes from one base colour.

Generators

Color Picker from Image

Click any pixel to grab its HEX, RGB & HSL value.

Image

Color Tint and Shade Table

Build tint and shade ramps from one base colour.

Color & Design

Color Tint Overlay

Wash any image with a colour at the strength you choose.

Image

Colour Contrast Checker

Test text contrast against WCAG AA and AAA.

Web & Dev

Column Extractor

Pull selected columns from CSV, TSV or tables.

Text

Common Ports Reference

Look up well-known TCP/UDP port numbers and services.

Security & Validation

Compare Two Lists

Find common and unique items across two lists.

Text

Complementary Color Finder

Find the opposite colour on the wheel, instantly.

Color & Design

Compound Interest Calculator

Grow savings with interest and contributions.

Converters & Calculators

Compress Image

Shrink JPEG file size in your browser, privately.

Image

Compress PDF

Shrink a PDF losslessly, in your browser.

PDF

Content Security Policy Builder

Assemble a valid CSP header or meta tag, directive by directive.

Security & Validation

Convert Image Format

Change images between PNG, JPG and WebP in your browser.

Image

Cookie Header Parser

Decode Cookie and Set-Cookie headers into fields.

Web & Dev

Cooking Measurement Converter

Cups, spoons, ml and ounces for recipes.

Converters & Calculators

Countdown to New Year

Live ticking countdown to the next New Year.

Date & Time

Coupon Code Generator

Free bulk generator for unique promo and discount codes.

Generators

CRC32 Checksum

Compute a CRC32 checksum in hex and decimal.

Encode / Decode

Credit Card Payoff Calculator

See how fast a fixed payment clears your card.

Finance

Credit Card Validator

Check a card number with Luhn and detect its brand.

Security & Validation

Cron Builder Explainer

Build and decode cron schedules in plain English.

Web & Dev

Crontab Explainer

Turn a cron expression into plain English.

Web & Dev

Crop PDF Margins

Trim white margins off every PDF page in your browser.

PDF

CSS Animation Generator

Build @keyframes and animation shorthand in seconds.

Web & Dev

CSS Border Radius Generator

Round each corner with sliders and a live preview.

Web & Dev

CSS Box Shadow Generator

Design a box-shadow with sliders and live preview.

Web & Dev

CSS clamp() Fluid Type

Build a fluid CSS clamp() value for type and spacing.

Color & Design

CSS Clip-path Generator

Generate CSS clip-path shapes with a live preview.

Web & Dev

CSS Gradient Generator

Build linear and radial gradients with a live preview.

Web & Dev

CSS Grid Generator

Visually build CSS grid layouts and copy the code.

Web & Dev

CSS Minifier & Beautifier

Minify or beautify CSS in your browser.

JSON & Data

CSS Specificity Calculator

Score any CSS selector as an (a,b,c) triple.

Web & Dev

CSS Triangle Generator

Make pure-CSS triangles with the border trick.

Web & Dev

CSS Unit Converter

Convert between px, rem, em, pt and percent.

Web & Dev

CSV Column Split / Merge

Keep, reorder or combine CSV columns.

JSON & Data

CSV Delimiter Converter

Swap CSV separators: comma, semicolon, tab, pipe.

JSON & Data

CSV to Markdown Table

Turn CSV into a clean GitHub-flavored Markdown table.

JSON & Data

CSV to SQL Converter

Turn CSV rows into SQL INSERT statements.

JSON & Data

CSV Viewer

View and scan CSV files as a clean table.

JSON & Data

Cubic Bezier Editor

Craft CSS easing curves visually.

Web & Dev

CUID Generator

Generate collision-resistant, URL-safe CUIDs.

Generators

cURL to Fetch

Turn a cURL command into JavaScript fetch code.

Web & Dev

Currency Converter

Offline currency maths with an editable rate table.

Converters & Calculators

Cursive Text Generator

Turn plain text into flowing cursive Unicode letters.

Text

Daily Calorie Needs Calculator

Daily calories for your goal, with macros.

Health & Fitness

Data Size Converter

Bytes, KB/MB/GB and KiB/MiB/GiB, side by side.

Converters & Calculators

Date Difference Calculator

Find the exact time between two dates.

Date & Time

Date Format Converter

Reformat any date into ISO, US, long and custom.

Date & Time

Day of the Week Finder

Find which weekday any date falls on.

Date & Time

Days in Month

How many days are in any month, leap years included.

Date & Time

Days Until a Date

Count down the days to any future date.

Date & Time

Debt Snowball Planner

See how fast the snowball clears your debts.

Finance

Decimal to Fraction

Turn any decimal into an exact, reduced fraction.

Math & Numbers

Delete / Extract Pages

Keep or remove specific PDF pages, in your browser.

PDF

Density Converter

Convert density between metric and imperial units.

Converters & Calculators

Dice Roller

Roll any number of dice with a modifier.

Generators

Diceware Passphrase Generator

Memorable, high-entropy word passphrases.

Generators

Discount Calculator

Find the sale price or work back to the original.

Finance

Distance Between Points

Find the distance between two 2D points instantly.

Math & Numbers

Dividend Yield Calculator

Work out dividend yield and annual income.

Finance

Docker Compose Generator

Scaffold a docker-compose.yml with databases and cache.

Web & Dev

Dockerfile Generator

Scaffold a clean Dockerfile in seconds.

Web & Dev

Domain Parser

Split any host into subdomain, domain and TLD.

Web & Dev

Dominant Color Extractor

Pull the main colours and a palette out of any image.

Image

Dotenv Example Generator

Turn a .env file into a safe .env.example.

Web & Dev

Download Time Calculator

How long a download takes at a given speed.

Converters & Calculators

Duotone Generator

Blend two colours into a duotone ramp and CSS gradient.

Color & Design

Email Address Validator

Check email syntax and split out the local and domain parts.

Security & Validation

Email Signature Generator

Create a clean HTML email signature in seconds.

Generators

Exponent Calculator

Raise any number to any power, instantly.

Math & Numbers

Extract Email Addresses

Pull every email out of any block of text.

Text

Extract Numbers from Text

Pull every number out of any text.

Text

Extract Text from PDF

Pull selectable text out of a PDF as plain .txt.

PDF

Extract URLs

Pull every link out of any block of text.

Text

Factorial Calculator

Compute n!, permutations and combinations exactly.

Math & Numbers

Fake Data Generator

Realistic fake people for test fixtures.

Generators

Favicon Generator

Turn any image into crisp favicon & app-icon PNGs.

Image

Find & Replace

Literal or regex find and replace with a count.

Text

Flatten PDF Forms

Bake filled form fields into a non-editable PDF, in-browser.

PDF

Flexbox Grid Playground

Tweak flexbox visually and copy the CSS.

Web & Dev

Flow Rate Converter

Convert between L/min, m³/h, gpm, cfm and more.

Converters & Calculators

Force Converter

Convert between newtons, pounds-force, kgf and more.

Converters & Calculators

Fraction Calculator

Add, subtract, multiply and divide fractions.

Math & Numbers

Fraction Simplifier

Reduce a fraction and convert it to decimal or mixed form.

Math & Numbers

Fraction to Decimal

Turn any fraction into its exact decimal.

Math & Numbers

Frequency Converter

Convert hertz, kHz, MHz, GHz, rpm, rad/s and bpm.

Converters & Calculators

Fuel Cost Calculator

Estimate the fuel cost of any trip.

Converters & Calculators

Fuel Economy Converter

Convert MPG, km/L and L/100km instantly.

Converters & Calculators

Future Value Calculator

See what your savings grow into with compounding.

Finance

GCD & LCM Calculator

Find the greatest common divisor and least common multiple.

Math & Numbers

Geolocation Viewer

See your device coordinates and accuracy.

Utilities

GIF to Frames

Split an animated GIF into individual PNG frames.

Image

Glassmorphism CSS Generator

Design a frosted-glass effect and copy the CSS.

Color & Design

Gradient Color Stops

Interpolate even color stops between two hex colors.

Color & Design

GraphQL Query Formatter

Pretty-print and indent GraphQL queries.

JSON & Data

Gravatar URL Generator

Turn an email into a Gravatar avatar URL.

Generators

Habit Tracker

Track daily habits and watch your streaks.

Utilities

Hash Generator

MD5, SHA-1, SHA-256, SHA-512 of any text.

Generators

Hash Identifier

Guess a hash type from its length and character set.

Security & Validation

Heart Rate Zone Calculator

Find your five training heart-rate zones by age.

Health & Fitness

HEX / RGB / HSL Converter

Convert colours between HEX, RGB and HSL.

Color & Design

Hex / Text / Binary Converter

Convert text to hex or binary and back.

Encode / Decode

Hex Dump Viewer

See text as a classic hexdump with ASCII gutter.

Encode / Decode

HMAC Generator

Keyed HMAC-SHA1/256/512 of any message.

Generators

Hourly Rate Calculator

Find the freelance rate that hits your income goal.

Finance

Hours Calculator

Add up the hours between two times, minus breaks.

Date & Time

HSV and HSB Converter

Convert hex and RGB to HSV / HSB values.

Color & Design

Htaccess Builder

Build Apache .htaccess rules with a few clicks.

Generators

HTML Boilerplate Generator

Build a clean HTML5 starter document in seconds.

Web & Dev

HTML Entity Encode / Decode

Escape and unescape HTML entities.

Encode / Decode

HTML Escape Unescape

Encode or decode HTML special characters.

Web & Dev

HTML Formatter / Minifier

Beautify or minify HTML in your browser.

JSON & Data

HTML Table to CSV

Turn an HTML table into clean CSV in one paste.

JSON & Data

HTML Table to JSON

Turn an HTML table into clean JSON.

JSON & Data

HTML to Markdown

Convert HTML into clean, readable Markdown.

JSON & Data

HTTP Header Reference

Searchable guide to common HTTP headers.

Web & Dev

HTTP Status Code Reference

Search every standard HTTP status code.

Web & Dev

IBAN Validator

Validate and format IBANs with the mod-97 check.

Generators

ICO Generator

Turn any image into a multi-size Windows .ico file.

Image

Ideal Weight Calculator

Estimate ideal body weight four ways from height.

Health & Fitness

Illuminance Converter

Convert lux, foot-candles, phot and more.

Converters & Calculators

Image Blur Tool

Softly blur any image right in your browser.

Image

Image Border / Padding

Add a solid colour border or padding around any image.

Image

Image Collage Maker

Combine several photos into one grid collage in-browser.

Image

Image DPI Setter

Set the print DPI of a PNG or JPEG without re-encoding.

Image

Image Filters

Adjust brightness, contrast, saturation and more live.

Image

Image Grid Splitter

Slice an image into an even grid of tiles in your browser.

Image

Image Histogram Viewer

See the tonal and colour distribution of any photo.

Image

Image Noise Generator

Add film grain or colour noise to any image, in-browser.

Image

Image Sharpen Tool

Crisp up soft or slightly blurry photos in your browser.

Image

Image Threshold

Convert any photo to pure black and white by brightness.

Image

Image to ASCII

Turn any photo into ASCII text art in your browser.

Image

Image to Base64

Encode an image as a base64 data URI in your browser.

Image

Image to Grayscale

Convert any image to black & white in your browser.

Image

Image Vignette

Darken the edges to draw the eye to your subject.

Image

Image Watermark Tool

Stamp text watermarks onto photos in your browser.

Image

Images to PDF

Combine PNG and JPEG images into a single PDF, in your browser.

PDF

IMEI Validator

Check if a 15-digit IMEI is valid.

Security & Validation

Inflation Calculator

See how inflation changes money over time.

Finance

INI to JSON

Convert INI config files into clean JSON.

JSON & Data

Invert Image Colors

Flip every colour to its opposite, right in your browser.

Image

IP to Binary Converter

Turn an IPv4 address into binary, decimal and hex.

Utilities

IPv6 Address Expander

Expand and compress IPv6 addresses instantly.

Utilities

ISBN Generator

Make valid ISBN-13 and ISBN-10 numbers for testing.

Generators

ISBN Validator

Check ISBN-10 and ISBN-13 numbers instantly.

Security & Validation

ISO Week Date Converter

Convert dates to and from ISO 8601 week numbers.

Date & Time

JS Minifier / Beautifier

Minify or pretty-print JavaScript in your browser.

JSON & Data

JSON Diff

Compare two JSON documents and see what changed.

JSON & Data

JSON Escape and Unescape

Encode or decode JSON string values.

JSON & Data

JSON Flattener

Flatten nested JSON into dot-notation keys.

JSON & Data

JSON Formatter

Format, validate & beautify JSON in your browser.

JSON & Data

JSON Merge

Deep-merge two JSON documents into one.

JSON & Data

JSON Schema to TypeScript

Turn a JSON Schema into TypeScript interfaces.

JSON & Data

JSON Schema Validator

Check JSON data against a JSON Schema in your browser.

JSON & Data

JSON Sort Keys

Alphabetise JSON object keys, deeply and instantly.

JSON & Data

JSON Stringify Tool

Re-serialise JSON with custom indentation or escaping.

JSON & Data

JSON to CSV Converter

Convert JSON arrays to CSV and back, in-browser.

JSON & Data

JSON to Go Struct

Generate Go structs from JSON instantly.

JSON & Data

JSON to INI

Turn a JSON object into INI config text.

JSON & Data

JSON to JSON Schema

Generate a draft-07 JSON Schema from sample data.

JSON & Data

JSON to Markdown Table

Turn a JSON array of objects into a Markdown table.

JSON & Data

JSON to NDJSON

Turn a JSON array into newline-delimited JSON.

JSON & Data

JSON to Python Dataclass

Turn JSON into typed Python @dataclass code.

JSON & Data

JSON to Query String

Build a URL query string from a JSON object.

JSON & Data

JSON to TypeScript Interface

Turn any JSON sample into typed TS interfaces.

JSON & Data

JSON to XML Attributes

Turn a flat JSON object into XML attributes.

JSON & Data

JSON to XML Converter

Convert JSON to XML and XML back to JSON.

JSON & Data

JSON to YAML Converter

Convert between JSON and YAML instantly.

JSON & Data

JSON Unflattener

Rebuild nested JSON from dot-notation keys.

JSON & Data

JSONPath Tester

Run JSONPath queries against your JSON live.

JSON & Data

Julian Date Converter

Convert calendar dates to Julian Dates and back.

Date & Time

JWT Decoder

Inspect JWT header, payload & claims.

Encode / Decode

JWT Generator HS256

Sign a JWT with HMAC-SHA256 in your browser.

Encode / Decode

Kelvin to RGB Converter

Turn a colour temperature into an sRGB swatch.

Color & Design

Keyboard Event Tester

See key, code, keyCode and modifiers for any keypress.

Utilities

Keyframes Spinner Generator

Build a CSS loading spinner, copy the code.

Web & Dev

Lean Body Mass Calculator

Estimate your lean body mass and fat mass.

Health & Fitness

Leap Year Checker

Check whether a year is a leap year.

Date & Time

Leetspeak Converter

Turn text into 1337 and back again.

Text

Letter Frequency Histogram

See how often each letter appears in your text.

Text

License Picker

Choose an open-source licence and get the text.

Web & Dev

Line Prefix & Numbering

Add a prefix, suffix or line numbers to every line.

Text

Line Shuffler

Randomly reorder the lines of any list.

Text

Linear Equation Solver

Solve a·x + b = c·x + d for x instantly.

Math & Numbers

Loan Calculator

Monthly payment, total cost and interest.

Converters & Calculators

Logarithm Calculator

Compute logs in any base instantly.

Math & Numbers

Lorem Ipsum Generator

Classic placeholder text by word, sentence or paragraph.

Generators

Lorem Picsum Random Image URL Generator

Random picsum.photos image URLs, HTML and CSS in one click.

Web & Dev

Lottery Number Generator

Random lottery picks with an optional bonus ball.

Generators

Luhn Number Validator

Verify any number with the Luhn checksum and find its check digit.

Security & Validation

Luminance Converter

Convert any colour to its luminance and contrast ratio.

Converters & Calculators

MAC Address Generator

Random, well-formed MAC addresses on demand.

Generators

Macro Nutrient Calculator

Turn a calorie target into protein, carb and fat grams.

Health & Fitness

Magic 8-Ball

Ask a question, shake for a classic answer.

Generators

Markdown Editor / Preview

Write Markdown, see HTML live and safely.

JSON & Data

Markdown to HTML

Convert Markdown into clean, safe HTML.

JSON & Data

Markup Calculator

Set a selling price from cost and markup.

Finance

Material Design Palette

Build a Material-style 50–900 colour ramp.

Color & Design

Max Heart Rate Calculator

Estimate your max heart rate from age, four ways.

Health & Fitness

Mean Calculator

Arithmetic, geometric and harmonic means.

Math & Numbers

Media Query Generator

Build responsive CSS media queries in seconds.

Web & Dev

Median and Mode Calculator

Find the median and mode of any number set.

Math & Numbers

Merge and Dedupe Lists

Combine two lists and remove duplicate lines.

Text

Merge PDF

Combine several PDFs into one, in your browser.

PDF

Meta / OG Tag Generator

Generate SEO, Open Graph and Twitter Card meta tags.

Web & Dev

Metronome

A clean, accurate online metronome.

Utilities

Midpoint Calculator

Find the midpoint and distance between two points.

Math & Numbers

MIME Type Lookup

Find the MIME type for any file extension.

Web & Dev

Mock JSON API Generator

Generate JSON test data from a custom schema.

Generators

Modulo Calculator

Find the remainder and true modulo of any division.

Math & Numbers

Monochromatic Palette

Build a single-hue tints-and-shades palette.

Color & Design

Moon Phase Calculator

See the moon phase for any date.

Date & Time

Morse Code Translator

Translate text to Morse code and back.

Encode / Decode

Mortgage Amortization Schedule

Full payment-by-payment loan amortization table.

Finance

Mortgage Calculator

Estimate monthly mortgage payments and total cost.

Finance

N-up PDF

Place 2, 4, or more PDF pages on a single sheet.

PDF

Nano ID Generator

Short, URL-safe, secure random IDs.

Generators

NATO Phonetic Spelling

Spell anything in the NATO phonetic alphabet.

Text

NDJSON to JSON

Convert NDJSON / JSON Lines into a JSON array.

JSON & Data

Nearest Named Color

Find the closest CSS colour name to any colour.

Color & Design

Net Worth Calculator

See what you own minus what you owe.

Finance

Nginx Config Generator

Build an nginx server block in seconds.

Web & Dev

Notepad (localStorage)

A private scratchpad saved in your browser.

Utilities

NPV Calculator

Net present value and IRR for any cash flow series.

Finance

Number Base Converter

Convert numbers between any base 2–36.

Converters & Calculators

Number Sequence Generator

Generate arithmetic, geometric and Fibonacci sequences.

Math & Numbers

Number to Words

Spell any number out in plain English.

Converters & Calculators

Numeronym Generator

Turn long words into numeronyms like i18n and a11y.

Encode / Decode

Octal Converter

Convert octal to decimal, binary and hex instantly.

Encode / Decode

On-screen Ruler

A calibrated ruler right on your screen.

Utilities

Open Graph Preview

See how your link looks when shared.

Web & Dev

Ovulation Calculator

Estimate your fertile window and ovulation day.

Health & Fitness

Pace to Finish Time

Predict your race finish time from your pace.

Health & Fitness

Palette Extractor

Pull the dominant colours out of any image.

Color & Design

Paper Size Reference

Look up paper sizes in mm, inches, points and pixels.

Converters & Calculators

Password Entropy Calculator

Measure password entropy in bits from its character pool.

Security & Validation

Password Generator

Strong random passwords, fully in your browser.

Generators

Password Policy Tester

Check a password against your exact rules.

Security & Validation

Password Strength Checker

Score a password and get specific ways to strengthen it.

Security & Validation

PDF Bookmark Viewer

See a PDF outline as a table of contents, in your browser.

PDF

PDF Image Extractor

Pull every embedded picture out of a PDF, in your browser.

PDF

PDF Metadata Editor

View and edit PDF title, author, and keywords.

PDF

PDF Page Counter

Count pages across one or many PDFs, instantly in-browser.

PDF

PDF Page Size Inspector

See every PDF page size, orientation and paper name.

PDF

PDF Split by Range

Split one PDF into several files by custom page ranges.

PDF

PDF to Images

Turn PDF pages into PNG or JPEG images, in your browser.

PDF

PDF to Text

Pull plain text out of any PDF, in your browser.

PDF

PDF to Word

Extract a PDF’s text into an editable .docx, privately.

PDF

Percentage & VAT Calculator

Percentages, percent change and VAT in one place.

Converters & Calculators

Percentage Calculator

Work out any percentage, change or markup.

Math & Numbers

Percentage Change Calculator

Find the percent increase or decrease.

Math & Numbers

Permutations and Combinations

Count nPr, nCr and their repetition variants.

Math & Numbers

Photo Duotone

Map any photo onto two colours for a bold duotone look.

Image

Physics Unit Converter

Speed, pressure and energy unit conversions.

Converters & Calculators

Pig Latin Translator

Turn English into Pig Latin, instantly.

Text

PIN Generator

Random numeric PINs from a secure source.

Generators

PIN Strength Checker

See how guessable your numeric PIN really is.

Security & Validation

Pixelate / Redact

Pixelate an image to a mosaic for redaction or effect.

Image

Placeholder Image Generator

Generate sized placeholder images with a label.

Image

Polaroid Frame Generator

Add a classic white polaroid border and handwritten caption.

Image

Pomodoro Timer

Focus in 25-minute sprints with smart breaks.

Utilities

Port Number Lookup

Find the service behind a TCP/UDP port.

Web & Dev

Power Converter

Convert watts, horsepower, BTU/h and more.

Converters & Calculators

PPI Density Calculator

Find a screen's pixels-per-inch and dot pitch.

Converters & Calculators

Pregnancy Due Date Estimator

Estimate your due date and current week.

Date & Time

Pregnancy Weight Gain Calculator

Check pregnancy weight gain against IOM guidelines.

Health & Fitness

Present Value Calculator

Discount future money back to what it is worth today.

Finance

Prime Factorization

Break any whole number into its prime factors.

Math & Numbers

Prime Number Checker

Test for primes, find the next prime, or list them.

Math & Numbers

Profit Margin Calculator

Turn cost and price into margin and markup.

Finance

Properties to JSON Converter

Convert Java .properties to JSON and back.

JSON & Data

Proportion Solver

Solve a : b = c : d for the missing term.

Math & Numbers

Protect / Unlock PDF

Remove edit restrictions or mark ownership, in-browser.

PDF

Protein Intake Calculator

Estimate your daily protein target.

Health & Fitness

Punycode Converter

Convert IDN domains to and from xn-- Punycode.

Encode / Decode

Pythagorean Theorem Calculator

Solve right triangles with a² + b² = c².

Math & Numbers

QR Code Generator

Create QR codes for URLs, text & Wi-Fi.

Generators

QR Code Image Reader

Decode a QR code from an image, privately.

Generators

QR Code Reader

Decode a QR image and read its content.

Utilities

Quadratic Equation Solver

Solve ax² + bx + c = 0 with real or complex roots.

Math & Numbers

Quarter Finder

Find the calendar or fiscal quarter for any date.

Date & Time

Query String to JSON

Turn a URL query string into clean JSON.

JSON & Data

Quoted-Printable Encoder

Encode and decode quoted-printable (RFC 2045) text.

Encode / Decode

Rail Fence Cipher

Encrypt and decrypt with the zig-zag transposition cipher.

Encode / Decode

Random Bytes Generator

Cryptographically secure random bytes, any encoding.

Generators

Random Color Generator

Generate random colours in hex, RGB and HSL.

Generators

Random Date Generator

Generate random dates within any range.

Generators

Random Decision Wheel

Let chance pick from your list of options.

Utilities

Random Emoji Picker

Pick random emoji by category, with or without repeats.

Generators

Random Group Maker

Split a list of names into fair random teams.

Generators

Random IP Address Generator

Generate random IPv4 and IPv6 addresses instantly.

Generators

Random Line Picker

Pick random lines from any list, fairly.

Text

Random Name Generator

Random first and last names on demand.

Generators

Random Number Generator

Random integers in any range, with optional uniqueness.

Generators

Random Palette Generator

Generate random colour palettes with harmony schemes.

Color & Design

Random Quote Generator

Get a fresh inspiring quote on demand.

Generators

Random Salt Generator

Generate cryptographic salts in hex or Base64.

Security & Validation

Random String Generator

Random strings from any alphabet you choose.

Generators

Random Team Picker

Split a name list into fair, random teams.

Generators

Ratio Calculator

Simplify ratios and solve proportions instantly.

Math & Numbers

Readability Keyword Density

Score reading ease and check keyword density.

Text

README Generator

Build a clean README.md from a few project fields.

Web & Dev

Regex Cheatsheet

Searchable regex reference with a live tester.

Web & Dev

Regex Tester

Test regular expressions with live matches & groups.

Text

Remove Diacritics

Strip accents from text to plain ASCII letters.

Text

Remove Duplicate Lines

Strip repeated lines and count what was removed.

Text

Remove Empty Lines

Delete blank lines and tidy up spacing.

Text

Remove EXIF Data

Strip EXIF, GPS & camera metadata from JPEGs privately.

Image

Remove Line Breaks

Strip line breaks from text, three ways.

Text

Remove Punctuation

Strip punctuation marks from any text instantly.

Text

Resize / Crop Image

Resize images to exact pixels in your browser.

Image

Resolution Converter

Pixels to aspect ratio, megapixels and standards.

Converters & Calculators

Retirement Savings Calculator

Project your nest egg from contributions and returns.

Finance

Reverse Word Order

Flip the order of words in any text.

Text

RGB to CMYK Converter

Turn screen RGB colours into print CMYK values.

Color & Design

Ring Size Converter

Convert ring sizes between US, UK, EU and Japan.

Converters & Calculators

Robots.txt Generator

Create a valid robots.txt for crawlers.

Generators

ROI Calculator

Measure return on investment and annualize it.

Finance

Roman Numeral Converter

Numbers ⇄ Roman numerals, 1 to 3999.

Converters & Calculators

Root Calculator

Find the square, cube or any nth root of a number.

Math & Numbers

Rotate / Flip Image

Rotate to any angle and flip images in your browser.

Image

Rotate / Reorder PDF

Rotate pages or change their order, in your browser.

PDF

Round Corners Tool

Add smooth rounded corners to any image in-browser.

Image

Rounding Calculator

Round numbers your way, to any precision.

Math & Numbers

RSA Keypair Generator

Create RSA public and private keys in your browser.

Generators

Rule of 72 Calculator

Estimate how long it takes your money to double.

Finance

Running Pace Calculator

Pace per km and mile, plus speed, from a run.

Converters & Calculators

Salary Converter

Convert pay between hourly, monthly and yearly.

Finance

Sales Tax Calculator

Add or remove sales tax / VAT from any price.

Finance

Savings Goal Calculator

Find the monthly saving to hit your target.

Finance

Scientific Notation Converter

Convert numbers to scientific, E and decimal form.

Math & Numbers

Screen Resolution Detector

See your screen size, DPR and aspect ratio.

Utilities

Screenshot Beautifier

Wrap screenshots in a gradient, padding and rounded corners.

Image

Secure Random Token

Generate cryptographically strong random tokens.

Security & Validation

Security Headers Builder

Generate HTTP security headers for any server.

Security & Validation

Semantic Version Bumper

Bump a semver string by major, minor, patch or prerelease.

Web & Dev

Sentence Splitter

Break a paragraph into one sentence per line.

Text

SHA-3 Hash

SHA3-224/256/384/512 hashes in your browser.

Encode / Decode

Shades & Tints Generator

Generate shade and tint ramps from one colour.

Color & Design

Shields.io Badge Generator

Build shields.io badge URLs, Markdown and HTML.

Web & Dev

Shoe Size Converter

Convert shoe sizes between US, UK, EU and cm.

Converters & Calculators

Simple Interest Calculator

Work out flat, non-compounding interest fast.

Finance

Sleep Cycle Calculator

Find the best time to sleep or wake up.

Date & Time

Slogan Generator

Catchy slogans for any brand or keyword.

Generators

Slope Calculator

Find the slope between two points instantly.

Math & Numbers

Slugify

Turn any title into a clean URL slug.

Text

Small Caps Generator

Turn text into ꜱᴍᴀʟʟ ᴄᴀᴘs you can paste anywhere.

Text

Smoking Cost Calculator

See what smoking really costs over time.

Health & Fitness

Sort Lines

Alphabetical or numeric line sorting, with dedupe.

Text

Spinner Wheel Picker

Spin a wheel to pick a random winner.

Generators

Split PDF

Break one PDF into several smaller files.

PDF

Spritesheet Slicer

Cut a spritesheet into individual frame PNGs.

Image

SQL Formatter

Pretty-print messy SQL into readable queries.

JSON & Data

SQL Minifier

Compress SQL into one compact line.

JSON & Data

Standard Deviation Calculator

Get mean, median, variance and standard deviation.

Math & Numbers

Stock Average Calculator

Find your weighted average share cost.

Finance

Stopwatch Countdown

A precise stopwatch and countdown timer with laps.

Utilities

Strikethrough Text Generator

Make s̶t̶r̶i̶k̶e̶t̶h̶r̶o̶u̶g̶h̶ text you can paste anywhere.

Text

Strip HTML

Convert HTML markup to clean plain text.

Text

Strong Password Tips

Check a password against strong-password best practices.

Security & Validation

Subnet Calculator

Network, broadcast, host range and mask details.

Utilities

Subresource Integrity Hash

Generate SRI integrity hashes for scripts and styles.

Security & Validation

SVG Optimizer

Shrink SVG markup losslessly in your browser.

Web & Dev

SVG to PNG

Rasterise SVG vectors into crisp PNGs at any scale.

Image

Tailwind Palette Generator

Build a 50–950 Tailwind colour scale from one hex.

Color & Design

Tally Counter

A simple click counter with adjustable step.

Utilities

TDEE Calculator

Find your daily calories to cut, maintain or bulk.

Health & Fitness

Test Card Numbers

Sandbox credit-card numbers for payment testing.

Generators

Tetradic Color Scheme

Generate a four-colour rectangle palette from one hex.

Color & Design

Text Diff

Compare two texts line by line and see the changes.

Text

Text on Image / Meme

Add classic top and bottom meme text to any image.

Image

Text Repeater

Repeat any text N times with a separator.

Text

Text Reverse & ROT13

Reverse characters or lines, or apply ROT13.

Text

Text Snippet Manager

Save, search and reuse text snippets in your browser.

Utilities

Time Adder Subtractor

Add or subtract hours, minutes and seconds from a time.

Date & Time

Time Ago Formatter

Turn any date into "3 hours ago" or "in 2 days".

Date & Time

Time Duration Calculator

Find the elapsed time between two clock times.

Date & Time

Timezone Converter

Convert a time between any two time zones.

Converters & Calculators

Tip & Bill Splitter

Split a bill and tip evenly across the table.

Converters & Calculators

To-Do List

A quick, private checklist in your browser.

Utilities

TOML to JSON

Convert TOML config into clean JSON instantly.

JSON & Data

Torque Converter

Convert between N·m, lb·ft and more.

Converters & Calculators

TOTP Code Generator

Turn a Base32 secret into a live 2FA code.

Security & Validation

TOTP Secret Generator

Create random Base32 TOTP secrets and otpauth URIs.

Security & Validation

Triadic Color Scheme

Three balanced hues, 120° apart on the wheel.

Color & Design

Triangle Solver

Solve any triangle from sides and angles.

Math & Numbers

Truncate Text

Shorten text to a character or word limit.

Text

Twitter Card Preview

Preview your twitter:card meta tags before you share.

Web & Dev

ULID Generator

Create sortable, timestamp-ordered ULIDs in your browser.

Generators

Unicode Character Explorer

Inspect code points, escapes and UTF-8 bytes per character.

Web & Dev

Unicode Character Inspector

Inspect code points, decimals and UTF-8 bytes.

Encode / Decode

Unicode Escape Converter

Convert text to \uXXXX escapes and back.

Encode / Decode

Unit Converter

Length, mass, area, volume and temperature.

Converters & Calculators

Unit Price Comparison

Find the best value by price per unit.

Utilities

Unix Timestamp Converter

Unix time ⇄ human dates, seconds or millis.

Converters & Calculators

Upside-Down Text

Flip text into upside-down unicode lookalikes.

Text

URL Encode / Decode

Percent-encode and decode URLs and query params.

Encode / Decode

URL Parser

Break a URL into its parts and query params.

Web & Dev

User-Agent Parser

Decode a User-Agent into browser, OS and device.

Web & Dev

Username Generator

Create memorable, brandable usernames instantly.

Generators

UTF-8 Byte Inspector

See how text becomes UTF-8 bytes, character by character.

Encode / Decode

UTM Campaign URL Builder

Add UTM tracking parameters to any link.

Web & Dev

UUID Generator

Generate RFC-4122 v4 UUIDs in bulk.

Generators

UUID v5 Generator

Deterministic name-based UUIDs from SHA-1.

Security & Validation

Vaporwave Aesthetic Text

Turn text into ｆｕｌｌ-ｗｉｄｔｈ aesthetic letters.

Text

vCard QR Code Generator

Make a scannable contact-card QR code.

Generators

Vigenere Cipher

Encrypt and decrypt with a keyword.

Encode / Decode

VO2 Max Estimator

Estimate your aerobic fitness from a simple test.

Health & Fitness

Volume Calculator

Find the volume of cubes, boxes, spheres and more.

Math & Numbers

Vowel and Consonant Counter

Count vowels, consonants and letters instantly.

Text

Waist to Hip Ratio

Measure body-fat distribution and health risk instantly.

Health & Fitness

Water Intake Calculator

Estimate how much water to drink each day.

Health & Fitness

Watermark PDF

Stamp diagonal text watermarks across a PDF, privately.

PDF

Week Number Calculator

Find the ISO-8601 week number for any date.

Date & Time

Whiteboard

A quick freehand sketch pad in your browser.

Utilities

Whitespace Cleaner

Trim, collapse spaces and strip blank lines.

Text

Whitespace Visualizer

Reveal hidden spaces, tabs and newlines.

Text

WiFi QR Code Generator

Share your WiFi with a scannable QR code.

Generators

Word & Character Counter

Words, characters, lines, sentences, reading time.

Text

Word Frequency Counter

Rank the most common words in any text.

Text

Word to PDF

Convert a .docx document’s text to PDF, privately.

PDF

Word Wrap Tool

Wrap text to a fixed column width on word boundaries.

Text

Words to Number

Turn number words into digits instantly.

Converters & Calculators

Working Hours Calculator

Net hours worked from clock-in, clock-out and breaks.

Date & Time

XML Formatter Validator

Pretty-print, minify and validate XML instantly.

JSON & Data

XML Minifier

Shrink XML by stripping whitespace and comments.

JSON & Data

XML Sitemap Generator

Build a valid sitemap.xml from your URLs.

Generators

XML to CSV

Turn record-style XML into a CSV table.

JSON & Data

XOR Cipher

Encrypt and decrypt text with a repeating-key XOR.

Encode / Decode

YAML to TOML

Convert YAML config to TOML in the browser.

JSON & Data

YAML Validator

Check YAML syntax with line-by-line errors.

JSON & Data

Yes or No Decision Maker

Let chance settle it with a random yes or no.

Generators

Zalgo Text Generator

Turn plain text into glitchy cursed Zalgo.

Text

Zodiac Sign Finder

Find your star sign and Chinese zodiac from a birthday.

Date & Time

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