500+ tools. Zero uploads.
Convert, format and generate — entirely in your browser. Your files never leave your device.
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Saved on this device PDF Bookmark Viewer
See a PDF outline as a table of contents, in your browser.
Compress PDF
Shrink a PDF losslessly, in your browser.
Crop PDF Margins
Trim white margins off every PDF page in your browser.
Delete / Extract Pages
Keep or remove specific PDF pages, in your browser.
Base64 to Image
Decode a base64 string back into a viewable image.
Brightness and Contrast Adjuster
Fine-tune photo brightness and contrast in your browser.
Color Tint Overlay
Wash any image with a colour at the strength you choose.
Favicon Generator
Turn any image into crisp favicon & app-icon PNGs.
JSON Formatter
Format, validate & beautify JSON in your browser.
JSON to CSV Converter
Convert JSON arrays to CSV and back, in-browser.
JSON to YAML Converter
Convert between JSON and YAML instantly.
CSS Minifier & Beautifier
Minify or beautify CSS in your browser.
Case Converter
camelCase, snake_case, kebab, Title & more.
Word & Character Counter
Words, characters, lines, sentences, reading time.
Regex Tester
Test regular expressions with live matches & groups.
Sort Lines
Alphabetical or numeric line sorting, with dedupe.
Base64 Encode / Decode
Encode and decode Base64, UTF-8 safe.
URL Encode / Decode
Percent-encode and decode URLs and query params.
JWT Decoder
Inspect JWT header, payload & claims.
Hex / Text / Binary Converter
Convert text to hex or binary and back.
UUID Generator
Generate RFC-4122 v4 UUIDs in bulk.
Password Generator
Strong random passwords, fully in your browser.
Hash Generator
MD5, SHA-1, SHA-256, SHA-512 of any text.
QR Code Generator
Create QR codes for URLs, text & Wi-Fi.
Unix Timestamp Converter
Unix time ⇄ human dates, seconds or millis.
Number Base Converter
Convert numbers between any base 2–36.
Roman Numeral Converter
Numbers ⇄ Roman numerals, 1 to 3999.
Data Size Converter
Bytes, KB/MB/GB and KiB/MiB/GiB, side by side.
HTTP Status Code Reference
Search every standard HTTP status code.
MIME Type Lookup
Find the MIME type for any file extension.
User-Agent Parser
Decode a User-Agent into browser, OS and device.
URL Parser
Break a URL into its parts and query params.
HEX / RGB / HSL Converter
Convert colours between HEX, RGB and HSL.
Shades & Tints Generator
Generate shade and tint ramps from one colour.
CSS clamp() Fluid Type
Build a fluid CSS clamp() value for type and spacing.
Glassmorphism CSS Generator
Design a frosted-glass effect and copy the CSS.
CIDR / Subnet Calculator
Work out network, broadcast and host range from a CIDR.
Battery Status Viewer
Live charge level and time remaining.
Browser Info Viewer
Inspect your browser, OS and environment.
Clipboard Inspector
Inspect what you just copied: type, size, counts.
Percentage Calculator
Work out any percentage, change or markup.
Fraction Simplifier
Reduce a fraction and convert it to decimal or mixed form.
GCD & LCM Calculator
Find the greatest common divisor and least common multiple.
Prime Number Checker
Test for primes, find the next prime, or list them.
Date Difference Calculator
Find the exact time between two dates.
Add or Subtract Days
Shift a date by days, weeks, months or years.
Days Until a Date
Count down the days to any future date.
Business Days Calculator
Count working days between two dates.
Simple Interest Calculator
Work out flat, non-compounding interest fast.
Mortgage Calculator
Estimate monthly mortgage payments and total cost.
ROI Calculator
Measure return on investment and annualize it.
CAGR Calculator
Compute the compound annual growth rate.
Blood Alcohol Calculator
Estimate your BAC with the Widmark formula.
BMR Calculator
Estimate resting calories burned per day.
Body Fat Percentage Calculator
Estimate body fat from tape measurements.
Body Surface Area Calculator
Estimate body surface area with four formulas.
Password Strength Checker
Score a password and get specific ways to strengthen it.
Password Entropy Calculator
Measure password entropy in bits from its character pool.
Credit Card Validator
Check a card number with Luhn and detect its brand.
Email Address Validator
Check email syntax and split out the local and domain parts.