Tools
37 browser-only utilities. Nothing you type is uploaded β it all runs in your tab.
Encoding
2 tools
Hashing
2 tools
Data
2 tools
Text
7 tools
Case converter
Convert identifiers between camelCase, snake_case, kebab-case, PascalCase, and CONSTANT_CASE.
Regex tester
Test a regular expression against sample text and see every match and capture group, live.
Text statistics
Count characters, words, lines, sentences and reading time as you type.
URL slug generator
Turn a title into a clean, lowercase, hyphenated URL slug β one per line.
Markdown preview
A small, safe Markdown renderer: headings, bold, italic, code, links, lists and quotes.
Sort & dedupe lines
Sort lines alphabetically, numerically or by length, optionally removing duplicates and blanks.
Text diff
Compare two blocks of text line by line and highlight what was added, removed or unchanged.
Generators
4 tools
UUID generator
Generate RFC 4122 version 4 UUIDs using your browser's cryptographic random source.
Password generator
Create strong random passwords locally, with a rough entropy estimate. Nothing is stored or sent.
Lorem ipsum generator
Generate placeholder paragraphs, sentences or words for mockups and layouts.
Random picker
Pick random items from a list, roll dice, or flip a coin β useful for standups, tests and decisions.
Date & time
2 tools
Numbers
4 tools
Number base converter
Convert between binary, octal, decimal and hexadecimal, with bit length and byte view.
Unit converter
Convert length, mass, temperature, area, volume, speed and data sizes without leaving the page.
Percentage calculator
Four everyday percentage questions in one place: of, is-what-percent, change, and reverse.
Number formatter
Format numbers with thousands separators, fixed decimals, percentages or compact notation.
Design
4 tools
Color converter
Convert a colour between HEX, RGB and HSL, with a live swatch and a contrast check.
Colour palette builder
Generate tints, shades and a complementary colour from one base colour, with copyable hex values.
px - rem converter
Convert between pixels and rem at a chosen root font size, as used for accessible CSS sizing.
Aspect ratio calculator
Work out matching dimensions for a target ratio, and see the CSS to keep the box from shifting.
Security
2 tools
Code
3 tools
CSS & HTML minifier
Strip comments and redundant whitespace from CSS or HTML. Safe, local, and reversible only from your original copy.
JSON to TypeScript
Generate TypeScript interfaces from a JSON sample, merging array element shapes into a single type.
String escape / unescape
Escape text into a JSON/JavaScript string literal, or turn an escaped literal back into readable text.
Web
3 tools
Query string parser
Break a URL's query string into a table, and rebuild a query string from key/value pairs.
HTML entity encoder
Escape or unescape HTML entities so text can be displayed safely inside markup.
Keyboard event inspector
Press any key to see the event.key, code, keyCode and modifier state a page actually receives.
DevOps
1 tools
Image
1 tools