Code Minifier & Beautifier

Minify code for production or beautify it for readability. Supports JS, HTML, and CSS in one fast tool.

Free forever. No sign-up. No server processing.

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.
You can upload a file or drag and drop it anywhere in this card.Max: 2 MB (JS), 1 MB (HTML/CSS)

Formatting options (browser-side)

Quick links:HTML FormatterCSS FormatterJSON FormatterJWT DecoderRegex Tester
Output appears here after you run Beautify or Minify.

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

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

Last updated: Apr 2026 · Powered by Prettier, Terser, CSSO, and html-minifier-terser

About this tool

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

For codebase-wide string or token cleanup, validate expressions in Regex Tester before minifying.

Working with data structures? Format and validate in JSON Formatter and JSON Validator.

By Muhammad Abdullah Rauf · Founder, EverydayTools.proUpdated 2026

Workflow guides

Step-by-step chains that connect related tools for common tasks.

Beautify minified production code for debugging

  1. Select the language (JS, HTML, CSS, or JSON) from the language selector.
  2. Paste your minified code into the input panel.
  3. Click Beautify — indentation and line breaks are restored for readability.
  4. Read the logic or trace the error, then discard the beautified copy.

Minify CSS for production deployment

  1. Select CSS as the language.
  2. Paste your authored stylesheet.
  3. Click Minify — all whitespace and comments are removed.
  4. Copy the minified output and serve it from your CDN or embed it in your HTML.

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Frequently Asked Questions

What is the difference between minification and beautification?

Minification removes all unnecessary characters (whitespace, comments, newlines) to reduce file size — a 100 KB CSS file might minify to 70 KB. Beautification is the reverse: it adds indentation and line breaks to make code human-readable. Use minification for production deployments; use beautification for debugging or reading third-party code.

Does minifying JavaScript break functionality?

Standard minification only removes whitespace and shortens variable names — it does not change logic and does not break correctly written code. However, code that relies on function.name, Error.stack, or specific whitespace in strings may behave differently after minification. Always test minified output.

Is my code uploaded to a server?

No. All processing runs in your browser. Your code — including any API keys, credentials, or internal logic — never leaves your device.

Is this tool free?

Yes — completely free with no signup and no size or usage limits.

Part of Developer Tools

Related Tools

More free tools for the same workflow.

CSS Formatter

Format CSS with consistent indentation and line breaks. Local beautification for readable stylesheets and git diffs.

HTML Formatter

Free HTML formatter—beautify minified markup with 2 or 4 space indent, minify for production. Runs locally in your browser; no upload or signup.

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