Developer tool
Your files never leave your device
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Work starts the moment you drop a file
No daily limit, no sign-up, no watermark
Vendor bundles, copied snippets, and incident-response dumps are easier to search once formatted. Keeping that work in the tab avoids leaking proprietary logic to an online beautifier.
js-beautify with indent_size 4. Invalid JS may still break or format oddly. The result pane uses syntax highlighting that respects prefers-color-scheme.
No TypeScript transpile, no ESLint fix, no source maps, no execution. Do not run untrusted code — formatting is not sandboxed execution, but still avoid pasting malware you intend to execute.
That is the promise behind every tool here. Files are read in your browser tab, processed there, and discarded when you close it — never uploaded to our servers.
Format and beautify your messy HTML code instantly in your browser.
Format, standardize, and beautify your CSS styling rules securely.
Format, validate, prettify and beautify your JSON data instantly.
Test, visualize, and debug Regular Expressions instantly in your browser.
Format, beautify, and strictly align your messy SQL queries securely.
Easily format and indent unformatted or minified XML files.
