Developer Tools That Run in Your Browser
Free. Fast. No sign-up. Your input is processed locally in your browser and never sent to our servers.
Popular Tools
Most used developer utilities and converters
cURL Command Generator & Builder
Web & API
Build curl commands in your browser — set method, headers, auth, and body, get a copy-ready command instantly. Presets for Bearer, POST JSON, file upload. Free, private, no signup.
Color Converter — HEX, RGB, HSL & OKLCH
Conversion Tools
Convert HEX to RGB, HSL, OKLCH, OKLAB and CMYK in your browser — copy any format with one click. Free, no signup, your colors never leave the page.
Free Word Counter & Character Count Tool
Text Processing
Count words, characters, sentences, paragraphs, and reading time instantly. Real-time word counter with Twitter, meta description, and Instagram limit checks. Free, private, no signup.
Hex to RGB Converter
Conversion Tools
Convert any hex color code to RGB in your browser — 3-digit, 6-digit, and 8-digit alpha hex all supported. Free, instant, no signup, your colors never leave the page.
Text Diff & Compare
Text Processing
Compare two texts instantly in your browser. Side-by-side view with inline word-level highlights, unified-diff export, ignore case / whitespace / blank lines. 100% private — your text never leaves your device.
RGB to Hex Converter
Conversion Tools
Convert RGB to hex in your browser — integers, percentages, and rgba alpha all supported. Free, instant, no signup, your colors never leave the page.
Free Regex Tester — Debug & Match Patterns Online
Text Processing
Test regex patterns instantly against any text. Live match highlighting, capture groups, replace preview, split, and pattern explainer. JavaScript-flavor regex, 100% private, no signup.
Hex to HSL Converter
Conversion Tools
Convert any hex color to HSL in your browser — 3-digit, 6-digit, 8-digit alpha all supported. Free, instant, no signup, your colors never leave the page.
Case Converter — UPPERCASE, lowercase, camelCase & More
Text Processing
Convert text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE and 6 more formats instantly. Free, browser-only, no signup.
Lorem Ipsum Generator — Free Placeholder Text Tool
Text Processing
Generate Lorem Ipsum placeholder text instantly — by paragraph, sentence, word, byte, or list. Copy or download as plain text, HTML, Markdown, or JSON. 100% free, private, in-browser. No sign-up.
Hex to OKLCH Converter
Conversion Tools
Convert HEX to OKLCH for Tailwind v4 design tokens. Live perceptually-uniform output with Display P3 gamut warnings. Free, browser-only.
URL Slug Generator — Slugify Any Text
Text Processing
Slugify any title into a clean, SEO-friendly URL slug instantly. Transliterate accents and Cyrillic, or keep Unicode letters. 100% private, in your browser.
Browse by Category
Find tools organized by their function
Encoding & Formatting
37 toolsConvert and format data between different encodings and formats
Security Tools
21 toolsHash generators, encryption utilities, and security validation tools
Date & Time
2 toolsUnix timestamp converters, timezone tools, and date formatters
Conversion Tools
21 toolsUnit converters, number system converters, and data transformation utilities
Text Processing
8 toolsText manipulation, string utilities, and content formatting tools
Web & API
8 toolsBuild curl commands, inspect HTTP, and debug API requests in your browser
Code
4 toolsFormat, minify and escape code right in your browser — nothing is uploaded.
Latest from the Blog
Developer tutorials, guides, and insights
Endianness: Why the Same Bytes Read as Two Different Numbers
Four bytes, 12 34 56 78, read as 0x12345678 or 0x78563412 depending on the reader. Endianness in JavaScript, Python, Go, PNG and GZIP, all measured online.
CRLF vs LF Line Endings: What Actually Breaks
A CRLF script usually runs fine and exits 0 — the damage hides in a variable. Four failure modes, the error text per shell, and the core.autocrlf matrix.
Your Input Stays in Your Browser
Tools process what you paste or upload right in your browser — your input is never sent to our servers. Most tools even work offline.