Code Minifier & Beautifier – Minify or Format JS, HTML, CSS

Minify for production or beautify for readability. Supports JS, HTML, and CSS in a single interface. All processing happens locally in your browser.

This tool runs entirely in your browser. Your code never leaves your device.100% browser-side. No backend. No server uploads. Safe within browser limits.
Max: 2 MB (JS), 1 MB (HTML/CSS)

This tool runs locally in your browser. No data is uploaded.

Beautify: Ctrl+Enter · Minify: Ctrl+Shift+Enter · Download: Ctrl+S

About this tool

Minify to reduce file size for production; beautify to make minified code readable. Uses Prettier for formatting; Terser (JS), a browser-safe HTML minifier, and csso (CSS) for minification. All processing runs in your browser—nothing is sent to a server.

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Frequently Asked Questions

What is the Code Minifier & Beautifier?

A single tool to minify or beautify JavaScript, HTML, and CSS. Minifying removes comments and extra whitespace to reduce file size. Beautifying formats code for readability using industry-standard Prettier (and Terser for JS minify). All processing runs in your browser—nothing is uploaded.

Is it free and private?

Yes. The tool is 100% free and runs entirely in your browser. Your code is never uploaded or stored on any server. This tool runs entirely in your browser; your code never leaves your device.

When should I minify vs beautify?

Minify for production to reduce load time and bandwidth. Beautify when you receive minified code and need to read or debug it.

What are the file size limits?

JavaScript: 2 MB max. HTML and CSS: 1 MB each. Limits are enforced in the browser for safety. For very large files, consider splitting or using a local build tool.

Is any data sent to a server?

No. This tool is 100% browser-side. All formatting and minification runs in your browser. No backend or server is involved; no code is uploaded or stored anywhere.