Pick a tool to start
50 instant, offline-first utilities. Everything runs in your browser — your data never leaves your machine.
Use the sidebar to browse, or press ⌘K to search.
Format / Validate / Minify
10 toolsJSON Formatter
Format, validate, and minify JSON.
HTML Beautify / Minify
Beautify or minify HTML.
CSS Beautify / Minify
Beautify or minify CSS.
JavaScript Beautify / Minify
Beautify or minify JavaScript.
ERB Beautify / Minify
Beautify or minify ERB / EJS templates.
LESS Beautify / Minify
Beautify or minify LESS.
Data Converter
16 toolsInspect / Preview / Debug
9 toolsUnix Time Converter
Convert Unix timestamps to dates and timezones.
JWT Debugger
Decode and inspect JSON Web Tokens.
RegExp Tester
Test regular expressions with live highlighting.
HTML Preview
Render HTML in a sandboxed iframe.
Text Diff Checker
Compare two pieces of text and highlight differences.
String Inspector
Length, byte size, words, lines, code points.
Generators
6 toolsEncoder / Decoder
6 toolsBase64 String
Encode/decode Base64 text (UTF-8 safe).
Base64 Image
Encode/decode Base64 images and data URIs.
URL Encode / Decode
Percent-encode and decode URLs.
HTML Entity Encode / Decode
Encode/decode HTML entities.
Backslash Escape / Unescape
Escape/unescape backslash sequences.
X.509 Certificate Decoder
Decode X.509 / PEM certificates.