Developer Tools
Free, browser-based utilities for developers. Everything runs locally - your data never leaves your device.
Categories
JSON Tools
Format, validate, view, diff, minify, query, and convert JSON.
Encoding Tools
Encode and decode Base64, URL components, and query strings.
Generator Tools
Generate UUIDs, passwords, placeholder text, and URL-friendly slugs.
Date & Time Tools
Convert between Unix time and human-readable dates.
Regex Tools
Test regular expressions against text.
Hash Tools
Generate SHA-256, SHA-384, and SHA-512 hashes.
XML Tools
Format, minify, validate, diff, and convert XML.
HTML Tools
Format, minify, validate, diff, and encode HTML text.
CSS Tools
Format, minify, validate, and diff CSS.
JavaScript Tools
Format, minify, validate, diff, escape, and convert JavaScript.
About these tools
Each tool performs one job. There are no combined mega-tools and no account requirements. Every page is a single-purpose utility you can open, use, and close without leaving anything behind.
Frequently asked questions
- Do these tools run on a server?
- No. Every tool on this site runs entirely in your browser. Your input never leaves your device.
- Do I need an account?
- No. There is no account, no sign-up, and no upload.