Reformat HTML, CSS, JS and JSON with proper indentation.
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Paste minified or jumbled code and get it back nicely indented. The beautifier supports HTML, CSS, JavaScript and JSON, each with format-aware indentation: HTML respects void elements, CSS lines up declarations under their selector, JS wraps after braces and semicolons, JSON uses the standard two-space layout. Use it to read third-party scripts, audit a competitor's source, or reformat a stylesheet before committing.
Drop your code into the editor — it accepts files of any size that your browser can handle.
Set indent width, comment handling, and other beautify preferences from the toolbar.
Click the beautify button to process the code entirely in your browser — nothing is uploaded.
Copy the beautify-ready code to your clipboard or save it as a file for your build pipeline.
Ugly, minified, or inconsistently indented code is a productivity tax. Code Beautifier normalizes formatting so diffs are meaningful, code reviews stay focused on logic, and beginners aren't intimidated by wall-of-text output. It's the kind of tool you invoke reflexively — copy, paste, tidy, back to work. Toolzer's design philosophy is simple: privacy-first (no tracking, no accounts), performance-first (the page is interactive in under a second on a 3G connection), and honesty-first (no fake ratings, no dark patterns, no upsells). Code Beautifier follows the same rules as every other utility on the site. You can bookmark this page, share the URL with a colleague, or pin it to your browser's toolbar — the experience will be identical every visit, and it will keep working even if you're on airplane Wi-Fi. Real people use this tool for real work — freelancers cleaning up client deliverables, sysadmins triaging tickets, students finishing assignments — and it is tuned for those workflows, not for demo videos.
No — Prettier rebuilds an AST and re-emits the canonical form. This is a fast, lightweight reformatter that handles 90% of cases. For production code in a repo, use Prettier or the language's official formatter.
Token-based formatters can't tell every for-loop from every object literal. Switch to JSON or CSS mode if your input is one of those, and treat the JS output as a starting point.
No. Invalid JSON is returned unchanged so you can see the original. Use the dedicated JSON Formatter tool for diagnostic error messages.
No. Formatting happens locally in your browser.
No. Every utility on Toolzer is free, anonymous, and works in any modern browser without registration.
Yes. Whenever the tool can produce an answer entirely in the browser, the data never leaves your device.
Yes. The interface is fully responsive and works on iOS Safari, Android Chrome, and every modern mobile browser.
Yes. Every Toolzer page has a clean permanent URL you can bookmark or share.
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