About Code Formatter & Preview
Why Format Code?
Consistent formatting makes code easier to read, review, and maintain. But different projects use different styles — tabs vs. spaces, semicolons vs. no semicolons, single quotes vs. double quotes. This tool lets you format (or minify) code in multiple languages with syntax-highlighted preview, all in the browser.
Supported Languages
JavaScript, TypeScript, JSON, HTML, CSS, and more. Select a language, paste your code, and hit Format. The side-by-side CodeMirror preview shows the result with proper syntax highlighting so you can verify it looks right before copying.
Minification
Need to shrink your code for production? The minify option strips whitespace and shortens where possible. It's not a full bundler — for that you'd use Webpack or esbuild — but it's handy for quick one-off minification of a config file or snippet.
Frequently asked questions
What languages can it format?
It formats common web languages like JavaScript and JSON and shows a side-by-side preview using CodeMirror.
Does it send my code to a server?
No. Formatting and preview run completely client-side in your browser.
Can I minify as well as format?
Yes, you can both beautify and minify your code.