Free Developer Tools
Handy, fast, and privacy-friendly utilities for everyday developer tasks. Every tool runs entirely in your browser — no data is sent to any server.
JSON Editor & Formatter
Paste, edit, format, minify, and validate JSON data with syntax highlighting. Instantly spot errors with line-level feedback and copy cleaned output in one click.
Markdown to HTML Converter
Convert Markdown to clean HTML instantly. Features a live side-by-side preview, supports full CommonMark spec including tables, code blocks, and images.
Password Generator
Generate cryptographically strong passwords with customizable length, character sets, and real-time strength analysis. Never reuse a weak password again.
UUID Generator
Generate RFC 4122 compliant version 4 UUIDs instantly. Supports bulk generation of up to 100 UUIDs at once with one-click copy for each or all.
SQL Formatter
Beautify and format messy SQL queries with proper indentation, keyword uppercasing, and consistent styling. Supports SELECT, INSERT, UPDATE, CREATE TABLE, and more.
Frequently Asked Questions
Are these tools really free?
Yes, completely free with no sign-up required. We built these tools to support the developer community, and they're funded by the ads on our site.
Is my data safe?
Absolutely. Every tool runs entirely in your browser using JavaScript. Your data never leaves your device — nothing is sent to our servers or any third party. You can verify this by checking your browser's network tab.
Can I use these tools on mobile?
Yes, all tools are fully responsive and work on mobile browsers. However, for the best experience with code-heavy tools like the JSON Editor or SQL Formatter, we recommend using a desktop or tablet.
Do you plan to add more tools?
We regularly add new tools based on community feedback. If you have a suggestion, feel free to reach out via our contact page.