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. Beautifier Un-minify and re-indent HTML, CSS and JavaScript with one click. JSON → TS Generate clean TypeScript interfaces from any JSON sample. HTML → JSX Turn any HTML snippet into valid React JSX in one click. JSON Path Click any value in your JSON and copy its exact path. gitignore Ready-made ignore rules for every language and OS — combine freely. robots.txt Compose allow/disallow rules and get a valid robots.txt instantly. OG Preview See your link exactly as social networks will render it. Regex Explainer Token-by-token breakdown of any regex pattern. JSON to Go Generate Go structs with json tags from any JSON. cURL to Code Turn cURL commands into fetch, Python, Node or PHP. package.json Generator A clean package.json from a simple form. API Mock Generator Realistic fake JSON records for testing APIs. TypeScript to Zod Turn TS interfaces into Zod schemas instantly. API Doc Generator Turn endpoints into clean Markdown docs. Code Snippet Image Beautiful shareable code screenshots as PNG. Codemod Runner Batch-transform code with pattern rules and preview the diff
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.