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Format and indent minified HTML, CSS, JS, and JSON.
🔒 100% client-side — your code is formatted in your browser only and never sent to any server.
Minified bundles, copied snippets, and machine-generated markup are nearly impossible to read on one line. This code beautifier re-indents HTML, CSS, JavaScript, and JSON with a consistent 2- or 4-space indent, live as you paste. It runs entirely in your browser — no upload, no server — so it is safe for proprietary code, and the result can be copied or downloaded as beautified.html, .css, .js, or .json.
JSON is parsed and re-serialized, so invalid input produces a precise parse error with a position. CSS and JavaScript go through string- and comment-aware tokenizers: braces open a new indent level, statements end at semicolons, and nothing breaks inside parentheses, 'quotes', template literals, or // comments — the JS formatter even uses a heuristic to leave /regex literals/ untouched. HTML indents block elements while keeping inline tags like <a>, <span>, and <strong> on a single line with their text.
Typical uses: un-minifying a .min.jssnippet to understand what it does, normalizing a config file before committing it, cleaning up HTML copied out of a browser's "view source", or pretty-printing a compacted API response. For day-to-day editing, a full Prettier/ESLint setup in your project is still the right tool — this one is for quick, one-off formatting without installing anything.
The formatters aim for "good enough" robustness, not perfection. They will not rewrap long lines, reorder rules, or fix syntax errors, and exotic edge cases — a > inside an HTML attribute value, division right after a closing parenthesis in JS — can confuse the lightweight tokenizers. JSON input must be strict JSON (no comments or trailing commas); use the beautifier on JS/JSON5-style objects only after making them valid JSON.
The Code Beautifier handles code beautifierdirectly in your browser. Paste or type your input, and the tool processes it instantly — no upload, no signup, no waiting. It's built for the moments when you need a quick transformation and don't want to leave your workflow.
Because the tool runs client-side, it's fast and private. Your text never touches a server, which makes it safe for sensitive content. The interface is keyboard-friendly and works on any device with a modern browser.
Common uses: people reach for this tool when they need to use a beautify minified javascript online, html formatter with indentation, unminify css online free, or json pretty print tool.
Browser-based tools like this one have a few real advantages over installed software or manual methods:
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