JavaScript tools
Every free tool that works with JavaScript files: convert, compress, edit and more, all in one place.
3 tools for JavaScript files
All free, all private. Open any tool to get started.
JavaScript Beautifier
Beautify and format JavaScript, TypeScript, JSX and TSX in your browser with Prettier, control semicolons, quotes, tab width, print width and trailing commas. Nothing is uploaded.
JavaScript Minifier
Minify and compress JavaScript in your browser with terser: mangle names, drop dead code and comments, keep class/function names when needed, and see the exact bytes saved. Nothing is uploaded.
JS Rendering Checker
See your page the way AI crawlers see it: without JavaScript. Fetch the raw HTML, count the words that survive, detect client-rendering framework markers, and diff against the rendered DOM to list exactly which content is invisible to GPTBot, ClaudeBot and PerplexityBot.
Browse by file type
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Problems we solve
From the blog
- Why AI Crawlers Don't Run JavaScript, and What That Costs You
- Why and How to Minify JavaScript (and CSS) for a Faster Site
- Every AI Crawler User-Agent, and Whether to Allow It
- How to Tell Whether AI Crawlers Are Actually Reading Your Site
- Cloudflare Blocks AI Crawlers by Default: How to Check and Fix It
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Start with JavaScript Beautifier
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