⚙️
Web & Dev
.editorconfig Generator
Build an .editorconfig file in seconds.
All tools
Search 500 tools by name, category or keyword. Star a tool to pin it to the top.
Your favourites
All tools
$
JSON & Data
.env to JSON Parser
Parse a .env file into clean JSON.
🚫
Web & Dev
.gitignore Generator
Combine ignore templates for your stack and tools.
🚀
Converters & Calculators
Acceleration Converter
Convert g, m/s², ft/s² and more.
🌗
Color & Design
Accessible Color Pair Finder
Check WCAG contrast and fix failing pairs.
➕
Date & Time
Add or Subtract Days
Shift a date by days, weeks, months or years.
🔢
PDF
Add Page Numbers
Stamp page numbers onto any PDF, in your browser.
🧮
Encode / Decode
Adler-32 Checksum
Compute the zlib Adler-32 checksum of text or hex.
🔓
Security & Validation
AES Text Decryptor
Decrypt AES-256-GCM text with your password.
🔐
Security & Validation
AES Text Encryptor
Encrypt and decrypt text with AES-256-GCM.
🎂
Converters & Calculators
Age Calculator
Exact age in years, months, days and totals.
🎂
Date & Time
Age in Days Weeks Months
See any age as years, months, days, weeks and hours.
🔁
Text
Anagram & Palindrome Checker
Check if text is a palindrome or two words are anagrams.
🎨
Color & Design
Analogous Color Scheme
Build harmonious analogous palettes from one colour.
📐
Converters & Calculators
Angle Converter
Convert degrees, radians, gradians and more.
💰
Finance
Annuity Calculator
Solve annuity payment, future value or present value.
📐
Math & Numbers
Area Calculator
Area and perimeter for six common shapes.
🔤
Web & Dev
ASCII Table Reference
Searchable ASCII table with dec, hex, oct and binary.
🔠
Encode / Decode
Ascii85 Encoder Decoder
Encode and decode Ascii85 (Base85) text.
🖼️
Converters & Calculators
Aspect Ratio Calculator
Simplify ratios and find missing dimensions.
🪞
Encode / Decode
Atbash Cipher
Encode and decode text with the mirror-alphabet cipher.
🚗
Finance
Auto Loan Calculator
Estimate car payments with tax, trade-in and down payment.
📊
Math & Numbers
Average Calculator
Mean, median, mode and range in one click.
🥓
Encode / Decode
Bacon Cipher
Encode and decode Francis Bacon’s A/B cipher.
▥
Generators
Barcode Generator
Make a Code 128 barcode and download it as SVG.
⇄
Encode / Decode
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.
🖼️
Image
Base64 to Image
Decode a base64 string back into a viewable image.
🅱️
Encode / Decode
Base91 Encoder Decoder
Encode and decode basE91, denser than Base64.
🗂️
Image
Batch Resize / Rename
Resize and rename many images at once, in your browser.
🔋
Utilities
Battery Status Viewer
Live charge level and time remaining.
🔢
Encode / Decode
Binary to Decimal Converter
Turn binary into decimal instantly.
⚡
Text
Bionic Reading Converter
Bold word beginnings to read faster.
🍷
Health & Fitness
Blood Alcohol Calculator
Estimate your BAC with the Widmark formula.
⚖️
Converters & Calculators
BMI Calculator
Body Mass Index from weight and height.
🔥
Health & Fitness
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.
𝗕
Text
Bold Unicode Text
Make 𝗯𝗼𝗹𝗱 text that works anywhere.
⚖️
Finance
Break-Even Calculator
Find the units and revenue you need to break even.
🔆
Image
Brightness and Contrast Adjuster
Fine-tune photo brightness and contrast in your browser.
🧭
Utilities
Browser Info Viewer
Inspect your browser, OS and environment.
💼
Date & Time
Business Days Calculator
Count working days between two dates.
🔐
Encode / Decode
Caesar Cipher
Encrypt and decrypt text with a shift cipher.
🚀
Finance
CAGR Calculator
Compute the compound annual growth rate.
📅
Date & Time
Calendar Generator
Build a printable month calendar for any year.
🔥
Health & Fitness
Calories Burned Calculator
Estimate calories burned from activity and time.
🔤
Text
Case Converter
camelCase, snake_case, kebab, Title & more.
🔡
Text
Character Frequency Counter
Tally how often each character appears in text.
🐉
Date & Time
Chinese Zodiac Finder
Find your Chinese zodiac animal and element by year.
🔐
Web & Dev
Chmod Calculator
Build Unix file permissions visually.
🌐
Utilities
CIDR / Subnet Calculator
Work out network, broadcast and host range from a CIDR.
⭕
Math & Numbers
Circle Calculator
Find radius, diameter, circumference and area.
⭕
Image
Circle-crop Avatar
Crop any photo into a round avatar with transparency.
📋
Utilities
Clipboard Inspector
Inspect what you just copied: type, size, counts.
👕
Converters & Calculators
Clothing Size Converter
Convert clothing sizes between US, UK, EU and IT.
🖨️
Color & Design
CMYK to RGB Converter
Turn print CMYK ink values into screen RGB and hex.
🪙
Converters & Calculators
Coin Counter
Tally a jar of coins to an exact total.
🪙
Generators
Coin Flip
Flip a virtual coin once or thousands of times.
👁️
Color & Design
Color Blindness Simulator
See your colour through colour-blind eyes.
◑
Utilities
Color Contrast Quick Check
Instant WCAG pass/fail for any text & background.
🎨
Color & Design
Color Format Converter
Convert between HEX, RGB and HSL instantly.
🎨
Color & Design
Color Mixer
Blend two hex colours at any ratio.
🌈
Generators
Color Palette Generator
Build harmonious palettes from one base colour.
🎨
Image
Color Picker from Image
Click any pixel to grab its HEX, RGB & HSL value.
🎨
Color & Design
Color Tint and Shade Table
Build tint and shade ramps from one base colour.
🎨
Image
Color Tint Overlay
Wash any image with a colour at the strength you choose.
🔆
Web & Dev
Colour Contrast Checker
Test text contrast against WCAG AA and AAA.
🧮
Text
Column Extractor
Pull selected columns from CSV, TSV or tables.
🔌
Security & Validation
Common Ports Reference
Look up well-known TCP/UDP port numbers and services.
🆚
Text
Compare Two Lists
Find common and unique items across two lists.
🎨
Color & Design
Complementary Color Finder
Find the opposite colour on the wheel, instantly.
📈
Converters & Calculators
Compound Interest Calculator
Grow savings with interest and contributions.
🗜️
Image
Compress Image
Shrink JPEG file size in your browser, privately.
🗜️
PDF
Compress PDF
Shrink a PDF losslessly, in your browser.
🛡️
Security & Validation
Content Security Policy Builder
Assemble a valid CSP header or meta tag, directive by directive.
🔄
Image
Convert Image Format
Change images between PNG, JPG and WebP in your browser.
🍪
Web & Dev
Cookie Header Parser
Decode Cookie and Set-Cookie headers into fields.
🥄
Converters & Calculators
Cooking Measurement Converter
Cups, spoons, ml and ounces for recipes.
🎆
Date & Time
Countdown to New Year
Live ticking countdown to the next New Year.
🎟️
Generators
Coupon Code Generator
Bulk-generate unique, readable promo and coupon codes.
🔢
Encode / Decode
CRC32 Checksum
Compute a CRC32 checksum in hex and decimal.
💳
Finance
Credit Card Payoff Calculator
See how fast a fixed payment clears your card.
💳
Security & Validation
Credit Card Validator
Check a card number with Luhn and detect its brand.
⏰
Web & Dev
Cron Builder Explainer
Build and decode cron schedules in plain English.
⏰
Web & Dev
Crontab Explainer
Turn a cron expression into plain English.
✁
PDF
Crop PDF Margins
Trim white margins off every PDF page in your browser.
🎬
Web & Dev
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.
📐
Color & Design
CSS clamp() Fluid Type
Build a fluid CSS clamp() value for type and spacing.
✂️
Web & Dev
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.
{}
JSON & Data
CSS Minifier & Beautifier
Minify or beautify CSS in your browser.
🎯
Web & Dev
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.
🧮
JSON & Data
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.
📈
Web & Dev
Cubic Bezier Editor
Craft CSS easing curves visually.
🆔
Generators
CUID Generator
Generate collision-resistant, URL-safe CUIDs.
🔁
Web & Dev
cURL to Fetch
Turn a cURL command into JavaScript fetch code.
💱
Converters & Calculators
Currency Converter
Offline currency maths with an editable rate table.
✒️
Text
Cursive Text Generator
Turn plain text into flowing cursive Unicode letters.
🍎
Health & Fitness
Daily Calorie Needs Calculator
Daily calories for your goal, with macros.
💾
Converters & Calculators
Data Size Converter
Bytes, KB/MB/GB and KiB/MiB/GiB, side by side.
📆
Date & Time
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.
❄️
Finance
Debt Snowball Planner
See how fast the snowball clears your debts.
½
Math & Numbers
Decimal to Fraction
Turn any decimal into an exact, reduced fraction.
✂️
PDF
Delete / Extract Pages
Keep or remove specific PDF pages, in your browser.
🧪
Converters & Calculators
Density Converter
Convert density between metric and imperial units.
🎲
Generators
Dice Roller
Roll any number of dice with a modifier.
🎲
Generators
Diceware Passphrase Generator
Memorable, high-entropy word passphrases.
🏷️
Finance
Discount Calculator
Find the sale price or work back to the original.
📐
Math & Numbers
Distance Between Points
Find the distance between two 2D points instantly.
💵
Finance
Dividend Yield Calculator
Work out dividend yield and annual income.
🐳
Web & Dev
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.
🎨
Image
Dominant Color Extractor
Pull the main colours and a palette out of any image.
🔑
Web & Dev
Dotenv Example Generator
Turn a .env file into a safe .env.example.
📶
Converters & Calculators
Download Time Calculator
How long a download takes at a given speed.
🎨
Color & Design
Duotone Generator
Blend two colours into a duotone ramp and CSS gradient.
📧
Security & Validation
Email Address Validator
Check email syntax and split out the local and domain parts.
✉️
Generators
Email Signature Generator
Create a clean HTML email signature in seconds.
🔢
Math & Numbers
Exponent Calculator
Raise any number to any power, instantly.
📧
Text
Extract Email Addresses
Pull every email out of any block of text.
🔢
Text
Extract Numbers from Text
Pull every number out of any text.
📝
PDF
Extract Text from PDF
Pull selectable text out of a PDF as plain .txt.
🔗
Text
Extract URLs
Pull every link out of any block of text.
!
Math & Numbers
Factorial Calculator
Compute n!, permutations and combinations exactly.
👤
Generators
Fake Data Generator
Realistic fake people for test fixtures.
⭐
Image
Favicon Generator
Turn any image into crisp favicon & app-icon PNGs.
⇄
Text
Find & Replace
Literal or regex find and replace with a count.
🗜️
PDF
Flatten PDF Forms
Bake filled form fields into a non-editable PDF, in-browser.
📐
Web & Dev
Flexbox Grid Playground
Tweak flexbox visually and copy the CSS.
🚰
Converters & Calculators
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.
➗
Math & Numbers
Fraction Calculator
Add, subtract, multiply and divide fractions.
½
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.
〰️
Converters & Calculators
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.
📈
Finance
Future Value Calculator
See what your savings grow into with compounding.
🔢
Math & Numbers
GCD & LCM Calculator
Find the greatest common divisor and least common multiple.
📍
Utilities
Geolocation Viewer
See your device coordinates and accuracy.
🎞️
Image
GIF to Frames
Split an animated GIF into individual PNG frames.
🧊
Color & Design
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.
◈
JSON & Data
GraphQL Query Formatter
Pretty-print and indent GraphQL queries.
🖼️
Generators
Gravatar URL Generator
Turn an email into a Gravatar avatar URL.
📆
Utilities
Habit Tracker
Track daily habits and watch your streaks.
✦
Generators
Hash Generator
MD5, SHA-1, SHA-256, SHA-512 of any text.
🔎
Security & Validation
Hash Identifier
Guess a hash type from its length and character set.
❤️
Health & Fitness
Heart Rate Zone Calculator
Find your five training heart-rate zones by age.
🎨
Color & Design
HEX / RGB / HSL Converter
Convert colours between HEX, RGB and HSL.
⇄
Encode / Decode
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.
✦
Generators
HMAC Generator
Keyed HMAC-SHA1/256/512 of any message.
💼
Finance
Hourly Rate Calculator
Find the freelance rate that hits your income goal.
⏱️
Date & Time
Hours Calculator
Add up the hours between two times, minus breaks.
🎨
Color & Design
HSV and HSB Converter
Convert hex and RGB to HSV / HSB values.
⚙
Generators
Htaccess Builder
Build Apache .htaccess rules with a few clicks.
🧱
Web & Dev
HTML Boilerplate Generator
Build a clean HTML5 starter document in seconds.
⇄
Encode / Decode
HTML Entity Encode / Decode
Escape and unescape HTML entities.
🔤
Web & Dev
HTML Escape Unescape
Encode or decode HTML special characters.
🧹
JSON & Data
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.
📋
Web & Dev
HTTP Header Reference
Searchable guide to common HTTP headers.
🛰️
Web & Dev
HTTP Status Code Reference
Search every standard HTTP status code.
🏦
Generators
IBAN Validator
Validate and format IBANs with the mod-97 check.
🪟
Image
ICO Generator
Turn any image into a multi-size Windows .ico file.
⚖️
Health & Fitness
Ideal Weight Calculator
Estimate ideal body weight four ways from height.
💡
Converters & Calculators
Illuminance Converter
Convert lux, foot-candles, phot and more.
🌫️
Image
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.
📑
PDF
Images to PDF
Combine PNG and JPEG images into a single PDF, in your browser.
📱
Security & Validation
IMEI Validator
Check if a 15-digit IMEI is valid.
📈
Finance
Inflation Calculator
See how inflation changes money over time.
🗂️
JSON & Data
INI to JSON
Convert INI config files into clean JSON.
🔄
Image
Invert Image Colors
Flip every colour to its opposite, right in your browser.
🔢
Utilities
IP to Binary Converter
Turn an IPv4 address into binary, decimal and hex.
🌐
Utilities
IPv6 Address Expander
Expand and compress IPv6 addresses instantly.
📚
Generators
ISBN Generator
Make valid ISBN-13 and ISBN-10 numbers for testing.
📚
Security & Validation
ISBN Validator
Check ISBN-10 and ISBN-13 numbers instantly.
📅
Date & Time
ISO Week Date Converter
Convert dates to and from ISO 8601 week numbers.
📜
JSON & Data
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.
🪐
Date & Time
Julian Date Converter
Convert calendar dates to Julian Dates and back.
🔑
Encode / Decode
JWT Decoder
Inspect JWT header, payload & claims.
🔏
Encode / Decode
JWT Generator HS256
Sign a JWT with HMAC-SHA256 in your browser.
🌡️
Color & Design
Kelvin to RGB Converter
Turn a colour temperature into an sRGB swatch.
⌨️
Utilities
Keyboard Event Tester
See key, code, keyCode and modifiers for any keypress.
🌀
Web & Dev
Keyframes Spinner Generator
Build a CSS loading spinner, copy the code.
💪
Health & Fitness
Lean Body Mass Calculator
Estimate your lean body mass and fat mass.
🗓️
Date & Time
Leap Year Checker
Check whether a year is a leap year.
🔠
Text
Leetspeak Converter
Turn text into 1337 and back again.
📈
Text
Letter Frequency Histogram
See how often each letter appears in your text.
📜
Web & Dev
License Picker
Choose an open-source licence and get the text.
№
Text
Line Prefix & Numbering
Add a prefix, suffix or line numbers to every line.
🔀
Text
Line Shuffler
Randomly reorder the lines of any list.
➗
Math & Numbers
Linear Equation Solver
Solve a·x + b = c·x + d for x instantly.
🏦
Converters & Calculators
Loan Calculator
Monthly payment, total cost and interest.
📈
Math & Numbers
Logarithm Calculator
Compute logs in any base instantly.
¶
Generators
Lorem Ipsum Generator
Classic placeholder text by word, sentence or paragraph.
🖼️
Web & Dev
Lorem Picsum URL Builder
Build placeholder image URLs for Lorem Picsum.
🎰
Generators
Lottery Number Generator
Random lottery picks with an optional bonus ball.
🔢
Security & Validation
Luhn Number Validator
Verify any number with the Luhn checksum and find its check digit.
💡
Converters & Calculators
Luminance Converter
Convert any colour to its luminance and contrast ratio.
🖧
Generators
MAC Address Generator
Random, well-formed MAC addresses on demand.
🥗
Health & Fitness
Macro Nutrient Calculator
Turn a calorie target into protein, carb and fat grams.
🎱
Generators
Magic 8-Ball
Ask a question, shake for a classic answer.
📝
JSON & Data
Markdown Editor / Preview
Write Markdown, see HTML live and safely.
📝
JSON & Data
Markdown to HTML
Convert Markdown into clean, safe HTML.
🏷️
Finance
Markup Calculator
Set a selling price from cost and markup.
🎨
Color & Design
Material Design Palette
Build a Material-style 50–900 colour ramp.
❤️
Health & Fitness
Max Heart Rate Calculator
Estimate your max heart rate from age, four ways.
📊
Math & Numbers
Mean Calculator
Arithmetic, geometric and harmonic means.
📐
Web & Dev
Media Query Generator
Build responsive CSS media queries in seconds.
📊
Math & Numbers
Median and Mode Calculator
Find the median and mode of any number set.
🧬
Text
Merge and Dedupe Lists
Combine two lists and remove duplicate lines.
🔗
PDF
Merge PDF
Combine several PDFs into one, in your browser.
🏷️
Web & Dev
Meta / OG Tag Generator
Generate SEO, Open Graph and Twitter Card meta tags.
🎵
Utilities
Metronome
A clean, accurate online metronome.
📐
Math & Numbers
Midpoint Calculator
Find the midpoint and distance between two points.
🗂️
Web & Dev
MIME Type Lookup
Find the MIME type for any file extension.
{ }
Generators
Mock JSON API Generator
Generate JSON test data from a custom schema.
➗
Math & Numbers
Modulo Calculator
Find the remainder and true modulo of any division.
🎨
Color & Design
Monochromatic Palette
Build a single-hue tints-and-shades palette.
🌙
Date & Time
Moon Phase Calculator
See the moon phase for any date.
⚡
Encode / Decode
Morse Code Translator
Translate text to Morse code and back.
🏦
Finance
Mortgage Amortization Schedule
Full payment-by-payment loan amortization table.
🏠
Finance
Mortgage Calculator
Estimate monthly mortgage payments and total cost.
🗂️
PDF
N-up PDF
Place 2, 4, or more PDF pages on a single sheet.
🆔
Generators
Nano ID Generator
Short, URL-safe, secure random IDs.
📻
Text
NATO Phonetic Spelling
Spell anything in the NATO phonetic alphabet.
🧾
JSON & Data
NDJSON to JSON
Convert NDJSON / JSON Lines into a JSON array.
🏷️
Color & Design
Nearest Named Color
Find the closest CSS colour name to any colour.
💰
Finance
Net Worth Calculator
See what you own minus what you owe.
🛠️
Web & Dev
Nginx Config Generator
Build an nginx server block in seconds.
📝
Utilities
Notepad (localStorage)
A private scratchpad saved in your browser.
💰
Finance
NPV Calculator
Net present value and IRR for any cash flow series.
🔢
Converters & Calculators
Number Base Converter
Convert numbers between any base 2–36.
🔢
Math & Numbers
Number Sequence Generator
Generate arithmetic, geometric and Fibonacci sequences.
🔤
Converters & Calculators
Number to Words
Spell any number out in plain English.
🔢
Encode / Decode
Numeronym Generator
Turn long words into numeronyms like i18n and a11y.
🔢
Encode / Decode
Octal Converter
Convert octal to decimal, binary and hex instantly.
📏
Utilities
On-screen Ruler
A calibrated ruler right on your screen.
🔗
Web & Dev
Open Graph Preview
See how your link looks when shared.
🌸
Health & Fitness
Ovulation Calculator
Estimate your fertile window and ovulation day.
🏃
Health & Fitness
Pace to Finish Time
Predict your race finish time from your pace.
🎨
Color & Design
Palette Extractor
Pull the dominant colours out of any image.
📄
Converters & Calculators
Paper Size Reference
Look up paper sizes in mm, inches, points and pixels.
🔣
Security & Validation
Password Entropy Calculator
Measure password entropy in bits from its character pool.
✦
Generators
Password Generator
Strong random passwords, fully in your browser.
🔐
Security & Validation
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.
🔖
PDF
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.
％
Converters & Calculators
Percentage & VAT Calculator
Percentages, percent change and VAT in one place.
％
Math & Numbers
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.
🟣
Image
Photo Duotone
Map any photo onto two colours for a bold duotone look.
⚛️
Converters & Calculators
Physics Unit Converter
Speed, pressure and energy unit conversions.
🐷
Text
Pig Latin Translator
Turn English into Pig Latin, instantly.
🔢
Generators
PIN Generator
Random numeric PINs from a secure source.
🔢
Security & Validation
PIN Strength Checker
See how guessable your numeric PIN really is.
🟦
Image
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.
🍅
Utilities
Pomodoro Timer
Focus in 25-minute sprints with smart breaks.
🔌
Web & Dev
Port Number Lookup
Find the service behind a TCP/UDP port.
⚡
Converters & Calculators
Power Converter
Convert watts, horsepower, BTU/h and more.
🖥️
Converters & Calculators
PPI Density Calculator
Find a screen's pixels-per-inch and dot pitch.
🤰
Date & Time
Pregnancy Due Date Estimator
Estimate your due date and current week.
🤰
Health & Fitness
Pregnancy Weight Gain Calculator
Check pregnancy weight gain against IOM guidelines.
💵
Finance
Present Value Calculator
Discount future money back to what it is worth today.
🔢
Math & Numbers
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.
💰
Finance
Profit Margin Calculator
Turn cost and price into margin and markup.
=
JSON & Data
Properties to JSON Converter
Convert Java .properties to JSON and back.
⚖️
Math & Numbers
Proportion Solver
Solve a : b = c : d for the missing term.
🔓
PDF
Protect / Unlock PDF
Remove edit restrictions or mark ownership, in-browser.
🥩
Health & Fitness
Protein Intake Calculator
Estimate your daily protein target.
🌐
Encode / Decode
Punycode Converter
Convert IDN domains to and from xn-- Punycode.
📐
Math & Numbers
Pythagorean Theorem Calculator
Solve right triangles with a² + b² = c².
▦
Generators
QR Code Generator
Create QR codes for URLs, text & Wi-Fi.
🔍
Generators
QR Code Image Reader
Decode a QR code from an image, privately.
🔍
Utilities
QR Code Reader
Decode a QR image and read its content.
📐
Math & Numbers
Quadratic Equation Solver
Solve ax² + bx + c = 0 with real or complex roots.
📆
Date & Time
Quarter Finder
Find the calendar or fiscal quarter for any date.
🔗
JSON & Data
Query String to JSON
Turn a URL query string into clean JSON.
✉️
Encode / Decode
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.
🎲
Generators
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.
🎡
Utilities
Random Decision Wheel
Let chance pick from your list of options.
🎲
Generators
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.
🎲
Text
Random Line Picker
Pick random lines from any list, fairly.
🪪
Generators
Random Name Generator
Random first and last names on demand.
#
Generators
Random Number Generator
Random integers in any range, with optional uniqueness.
🎨
Color & Design
Random Palette Generator
Generate random colour palettes with harmony schemes.
💬
Generators
Random Quote Generator
Get a fresh inspiring quote on demand.
🧂
Security & Validation
Random Salt Generator
Generate cryptographic salts in hex or Base64.
✦
Generators
Random String Generator
Random strings from any alphabet you choose.
🤝
Generators
Random Team Picker
Split a name list into fair, random teams.
➗
Math & Numbers
Ratio Calculator
Simplify ratios and solve proportions instantly.
📊
Text
Readability Keyword Density
Score reading ease and check keyword density.
📝
Web & Dev
README Generator
Build a clean README.md from a few project fields.
🔤
Web & Dev
Regex Cheatsheet
Searchable regex reference with a live tester.
.*
Text
Regex Tester
Test regular expressions with live matches & groups.
é
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.
🧽
Image
Remove EXIF Data
Strip EXIF, GPS & camera metadata from JPEGs privately.
↵
Text
Remove Line Breaks
Strip line breaks from text, three ways.
✂️
Text
Remove Punctuation
Strip punctuation marks from any text instantly.
📐
Image
Resize / Crop Image
Resize images to exact pixels in your browser.
🖥️
Converters & Calculators
Resolution Converter
Pixels to aspect ratio, megapixels and standards.
🏖️
Finance
Retirement Savings Calculator
Project your nest egg from contributions and returns.
🔁
Text
Reverse Word Order
Flip the order of words in any text.
🖨️
Color & Design
RGB to CMYK Converter
Turn screen RGB colours into print CMYK values.
💍
Converters & Calculators
Ring Size Converter
Convert ring sizes between US, UK, EU and Japan.
🤖
Generators
Robots.txt Generator
Create a valid robots.txt for crawlers.
📈
Finance
ROI Calculator
Measure return on investment and annualize it.
Ⅻ
Converters & Calculators
Roman Numeral Converter
Numbers ⇄ Roman numerals, 1 to 3999.
√
Math & Numbers
Root Calculator
Find the square, cube or any nth root of a number.
🔄
Image
Rotate / Flip Image
Rotate to any angle and flip images in your browser.
🔄
PDF
Rotate / Reorder PDF
Rotate pages or change their order, in your browser.
🔲
Image
Round Corners Tool
Add smooth rounded corners to any image in-browser.
🔢
Math & Numbers
Rounding Calculator
Round numbers your way, to any precision.
🔑
Generators
RSA Keypair Generator
Create RSA public and private keys in your browser.
📈
Finance
Rule of 72 Calculator
Estimate how long it takes your money to double.
🏃
Converters & Calculators
Running Pace Calculator
Pace per km and mile, plus speed, from a run.
💷
Finance
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.
🔬
Math & Numbers
Scientific Notation Converter
Convert numbers to scientific, E and decimal form.
🖥️
Utilities
Screen Resolution Detector
See your screen size, DPR and aspect ratio.
🖼️
Image
Screenshot Beautifier
Wrap screenshots in a gradient, padding and rounded corners.
🔑
Security & Validation
Secure Random Token
Generate cryptographically strong random tokens.
🛡️
Security & Validation
Security Headers Builder
Generate HTTP security headers for any server.
🏷️
Web & Dev
Semantic Version Bumper
Bump a semver string by major, minor, patch or prerelease.
✂️
Text
Sentence Splitter
Break a paragraph into one sentence per line.
🔐
Encode / Decode
SHA-3 Hash
SHA3-224/256/384/512 hashes in your browser.
🌗
Color & Design
Shades & Tints Generator
Generate shade and tint ramps from one colour.
🏷️
Web & Dev
Shields Badge Generator
Build shields.io badge URLs, Markdown and HTML.
👟
Converters & Calculators
Shoe Size Converter
Convert shoe sizes between US, UK, EU and cm.
💵
Finance
Simple Interest Calculator
Work out flat, non-compounding interest fast.
😴
Date & Time
Sleep Cycle Calculator
Find the best time to sleep or wake up.
💡
Generators
Slogan Generator
Catchy slogans for any brand or keyword.
📈
Math & Numbers
Slope Calculator
Find the slope between two points instantly.
🔗
Text
Slugify
Turn any title into a clean URL slug.
ꜱ
Text
Small Caps Generator
Turn text into ꜱᴍᴀʟʟ ᴄᴀᴘs you can paste anywhere.
🚬
Health & Fitness
Smoking Cost Calculator
See what smoking really costs over time.
↕
Text
Sort Lines
Alphabetical or numeric line sorting, with dedupe.
🎡
Generators
Spinner Wheel Picker
Spin a wheel to pick a random winner.
✂️
PDF
Split PDF
Break one PDF into several smaller files.
🧩
Image
Spritesheet Slicer
Cut a spritesheet into individual frame PNGs.
🗄️
JSON & Data
SQL Formatter
Pretty-print messy SQL into readable queries.
🗜️
JSON & Data
SQL Minifier
Compress SQL into one compact line.
📊
Math & Numbers
Standard Deviation Calculator
Get mean, median, variance and standard deviation.
📈
Finance
Stock Average Calculator
Find your weighted average share cost.
⏱️
Utilities
Stopwatch Countdown
A precise stopwatch and countdown timer with laps.
🚫
Text
Strikethrough Text Generator
Make s̶t̶r̶i̶k̶e̶t̶h̶r̶o̶u̶g̶h̶ text you can paste anywhere.
⟨⟩
Text
Strip HTML
Convert HTML markup to clean plain text.
🔐
Security & Validation
Strong Password Tips
Check a password against strong-password best practices.
🌐
Utilities
Subnet Calculator
Network, broadcast, host range and mask details.
🔒
Security & Validation
Subresource Integrity Hash
Generate SRI integrity hashes for scripts and styles.
🖼️
Web & Dev
SVG Optimizer
Shrink SVG markup losslessly in your browser.
🖼️
Image
SVG to PNG
Rasterise SVG vectors into crisp PNGs at any scale.
🎨
Color & Design
Tailwind Palette Generator
Build a 50–950 Tailwind colour scale from one hex.
🔢
Utilities
Tally Counter
A simple click counter with adjustable step.
🔥
Health & Fitness
TDEE Calculator
Find your daily calories to cut, maintain or bulk.
▭
Generators
Test Card Numbers
Sandbox credit-card numbers for payment testing.
🎨
Color & Design
Tetradic Color Scheme
Generate a four-colour rectangle palette from one hex.
±
Text
Text Diff
Compare two texts line by line and see the changes.
💬
Image
Text on Image / Meme
Add classic top and bottom meme text to any image.
∞
Text
Text Repeater
Repeat any text N times with a separator.
⇄
Text
Text Reverse & ROT13
Reverse characters or lines, or apply ROT13.
📋
Utilities
Text Snippet Manager
Save, search and reuse text snippets in your browser.
⏱️
Date & Time
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.
🌐
Converters & Calculators
Timezone Converter
Convert a time between any two time zones.
🧾
Converters & Calculators
Tip & Bill Splitter
Split a bill and tip evenly across the table.
✅
Utilities
To-Do List
A quick, private checklist in your browser.
🧩
JSON & Data
TOML to JSON
Convert TOML config into clean JSON instantly.
🔧
Converters & Calculators
Torque Converter
Convert between N·m, lb·ft and more.
🔐
Security & Validation
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.
🔺
Color & Design
Triadic Color Scheme
Three balanced hues, 120° apart on the wheel.
📐
Math & Numbers
Triangle Solver
Solve any triangle from sides and angles.
✂️
Text
Truncate Text
Shorten text to a character or word limit.
🐦
Web & Dev
Twitter Card Preview
Preview your twitter:card meta tags before you share.
🪪
Generators
ULID Generator
Create sortable, timestamp-ordered ULIDs in your browser.
🔤
Web & Dev
Unicode Character Explorer
Inspect code points, escapes and UTF-8 bytes per character.
🔍
Encode / Decode
Unicode Character Inspector
Inspect code points, decimals and UTF-8 bytes.
🔤
Encode / Decode
Unicode Escape Converter
Convert text to \uXXXX escapes and back.
📏
Converters & Calculators
Unit Converter
Length, mass, area, volume and temperature.
🛒
Utilities
Unit Price Comparison
Find the best value by price per unit.
🕑
Converters & Calculators
Unix Timestamp Converter
Unix time ⇄ human dates, seconds or millis.
🙃
Text
Upside-Down Text
Flip text into upside-down unicode lookalikes.
⇄
Encode / Decode
URL Encode / Decode
Percent-encode and decode URLs and query params.
🔗
Web & Dev
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.
🪪
Generators
Username Generator
Create memorable, brandable usernames instantly.
🔬
Encode / Decode
UTF-8 Byte Inspector
See how text becomes UTF-8 bytes, character by character.
📈
Web & Dev
UTM Campaign URL Builder
Add UTM tracking parameters to any link.
✦
Generators
UUID Generator
Generate RFC-4122 v4 UUIDs in bulk.
🆔
Security & Validation
UUID v5 Generator
Deterministic name-based UUIDs from SHA-1.
🌴
Text
Vaporwave Aesthetic Text
Turn text into ｆｕｌｌ-ｗｉｄｔｈ aesthetic letters.
📇
Generators
vCard QR Code Generator
Make a scannable contact-card QR code.
🔐
Encode / Decode
Vigenere Cipher
Encrypt and decrypt with a keyword.
🫁
Health & Fitness
VO2 Max Estimator
Estimate your aerobic fitness from a simple test.
📦
Math & Numbers
Volume Calculator
Find the volume of cubes, boxes, spheres and more.
🔤
Text
Vowel and Consonant Counter
Count vowels, consonants and letters instantly.
📏
Health & Fitness
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.
💧
PDF
Watermark PDF
Stamp diagonal text watermarks across a PDF, privately.
📅
Date & Time
Week Number Calculator
Find the ISO-8601 week number for any date.
🖊️
Utilities
Whiteboard
A quick freehand sketch pad in your browser.
␣
Text
Whitespace Cleaner
Trim, collapse spaces and strip blank lines.
␣
Text
Whitespace Visualizer
Reveal hidden spaces, tabs and newlines.
📶
Generators
WiFi QR Code Generator
Share your WiFi with a scannable QR code.
#
Text
Word & Character Counter
Words, characters, lines, sentences, reading time.
📊
Text
Word Frequency Counter
Rank the most common words in any text.
📝
PDF
Word to PDF
Convert a .docx document’s text to PDF, privately.
↩️
Text
Word Wrap Tool
Wrap text to a fixed column width on word boundaries.
🔡
Converters & Calculators
Words to Number
Turn number words into digits instantly.
⏱️
Date & Time
Working Hours Calculator
Net hours worked from clock-in, clock-out and breaks.
📄
JSON & Data
XML Formatter Validator
Pretty-print, minify and validate XML instantly.
🗜️
JSON & Data
XML Minifier
Shrink XML by stripping whitespace and comments.
🗺
Generators
XML Sitemap Generator
Build a valid sitemap.xml from your URLs.
📊
JSON & Data
XML to CSV
Turn record-style XML into a CSV table.
🔐
Encode / Decode
XOR Cipher
Encrypt and decrypt text with a repeating-key XOR.
🔁
JSON & Data
YAML to TOML
Convert YAML config to TOML in the browser.
✅
JSON & Data
YAML Validator
Check YAML syntax with line-by-line errors.
🎲
Generators
Yes or No Decision Maker
Let chance settle it with a random yes or no.
👹
Text
Zalgo Text Generator
Turn plain text into glitchy cursed Zalgo.
♈
Date & Time
Zodiac Sign Finder
Find your star sign and Chinese zodiac from a birthday.
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