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Code Beautifier & Minifier

Format messy HTML, CSS, JavaScript, or JSON into clean, indented code — or minify it to a single compact line — instantly and entirely in your browser.

Action

Everything runs in your browser — your code is never uploaded to a server.

Understanding the Code Beautifier & Minifier

Code Beautifier & Minifier formats or compresses code in HTML, CSS, JavaScript, and JSON instantly in your browser. Beautify messy code into clean, consistently indented files with 2-space indentation, or minify it to shrink file size by stripping comments and collapsing whitespace. All processing runs client-side—your code never leaves your device.

How it works

Beautify uses the js-beautify library to reformat code with proper indentation, while minify performs a lightweight pass: stripping block comments and reducing all runs of whitespace (including newlines) to single spaces. JSON is handled separately using native parse and stringify operations. For JSON beautification, the tool parses the input and re-stringifies it with 2-space indentation; for minification, it re-stringifies without spacing. All operations execute directly in your browser using JavaScript—no server interaction occurs.

Worked example

Input (minified): `{"name":"alice","age":30}` → Beautify output: ``` { "name": "alice", "age": 30 } ``` Or with CSS: Input: `body{margin:0;padding:10px}div{color:red}` → Beautify output: ``` body { margin: 0; padding: 10px } div { color: red } ```

Tips & common mistakes

  • Use Beautify to make messy or compressed code readable during development and debugging.
  • Minify is not a full optimizer—it strips comments and whitespace but does not rename variables or restructure code, keeping output safe and readable.
  • JSON minification and beautification via this tool will reorder keys based on the parser; use a specialized JSON tool if key order matters.
  • Downloaded files inherit the language extension you selected (.html, .css, .js, .json)—useful for batch formatting.
  • Minify runs a lightweight pass by design; for production JavaScript minification, consider dedicated tools like UglifyJS or Terser.
  • Check the error message if parsing fails on JSON—it will show which line or character caused the parse error.

Related tools

JSON Formatter & ValidatorFormat, beautify, minify, and validate JSON with clear error messages.Base64 Encode / DecodeEncode text to Base64 or decode Base64 back to text, with full Unicode support.URL Encode / DecodePercent-encode or decode text for safe use in URLs and query strings.Hash GeneratorGenerate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text.

Frequently Asked Questions

Which languages does it support?

You can beautify or minify HTML, CSS, JavaScript, and JSON. Pick the language from the dropdown, paste your code, and choose Beautify to indent it cleanly or Minify to shrink it.

Does it minify code too?

Yes. Minify runs a lightweight pass that strips comments and collapses whitespace to make files smaller. It is not a full optimizer — it will not rename variables or restructure your code, so the result stays safe and readable as data.

Is my code uploaded anywhere?

No. All formatting and minifying happen locally in your browser using JavaScript. Your code never leaves your device and nothing is sent to a server.