CodeKit — Code & Developer Tools
Format, minify, test and generate code right in your browser. Every tool is free, instant and private — your code never leaves your device.
100% client-side Free forever No sign-up
Runs 100% in your browser — nothing is ever uploaded.
All CodeKit tools
JSON Formatter Paste JSON to pretty-print it with your preferred indentation, validate syntax with precise error locations, or minify it to one line. CSS Minifier Compress your stylesheets by removing comments, whitespace and redundant syntax. See exact size savings before and after. HTML Minifier Shrink your HTML by removing comments and collapsing whitespace — safer page-speed wins with zero server round-trips. JS Minifier Compress JavaScript by stripping comments and whitespace. Your code is processed locally and never uploaded anywhere. SQL Formatter Turn messy one-line queries into cleanly indented, readable SQL. Supports MySQL, PostgreSQL, SQLite, T-SQL, MariaDB and more. Regex Tester Write a pattern, paste test text and watch matches highlight live — with capture groups, flags and a quick syntax reference. Meta Tags Fill in your page details and get complete, ready-to-paste HTML meta tags — SEO basics, Open Graph and Twitter Cards, with a live snippet preview.
Frequently asked questions
Is my code uploaded to a server?
Never. Every CodeKit tool runs entirely in your browser with JavaScript. Your code is processed on your device and never touches a network — it even works offline once the page is loaded.
Are these tools really free?
Yes — 100% free, no sign-up, no limits, no watermarks. We keep the site running with minimal, non-intrusive ads.
Is there a file or size limit?
No hard limit. Because processing happens on your machine, the only constraint is your device’s memory. Files of several megabytes work fine.