Code Beautifier
Format and beautify HTML, CSS, JavaScript, and JSON with adjustable indentation. Free in-browser beautifier — paste messy code, get readable output.
How to Use
- Pick the code language from the selector at the top (HTML, CSS, JavaScript, or JSON)
- Paste your code into the input area — works for minified bundles, Stack Overflow snippets, or messy Slack pastes
- Choose the indentation that matches your team style: 2 spaces (frontend), 4 spaces (Java/Python), or tabs (legacy projects)
- Click "Beautify code" — everything runs locally in your browser, not a single line is sent to a server
- Copy the result from the right panel to your clipboard with one click, ready to paste into VS Code, IntelliJ, GitHub, or Notion
- JSON mode validates syntax automatically and highlights the exact line where the JSON breaks, useful when debugging API responses
All processing is done in your browser, and files are never sent to a server.
Frequently Asked Questions
The beautifier supports HTML, CSS, JavaScript, and JSON code.
Yes, you can adjust indent size and choose between spaces and tabs.
Each code type should be selected individually for the best formatting results.
No. Beautification runs entirely in your browser via Prettier-like libraries — code never leaves the page.
Yes. The beautifier handles minified JS, including obfuscated bundles, though variable names will stay short.
Yes, up to a few MB. Beyond that, browser memory becomes the limit — split very large files first.
Yes — many teams beautify locally to keep PR diffs free of whitespace noise that hides the real change.