How to use Code Beautifier & Formatter
A code beautifier takes messy, minified, or inconsistently formatted code and rewrites it with clean, consistent indentation and spacing. This tool is powered by Prettier, the opinionated formatter that has become the de facto standard across the JavaScript ecosystem and beyond. It handles ten languages — JavaScript, TypeScript, JSON, CSS, SCSS, LESS, HTML, Markdown, YAML, and GraphQL — and lets you choose a two- or four-space indent. Everything runs in your browser, so you can tidy up a snippet instantly without installing anything, and your code is never uploaded.
- Choose the language of your code.
- Pick a two- or four-space indent.
- Paste your code into the input box.
- Click Beautify Code.
- Copy the cleanly formatted result.
Your data never leaves your device — 100% private processing.
Why consistent formatting matters
Consistent formatting is not about aesthetics for its own sake — it makes code easier to read, review, and maintain. When every file follows the same indentation and spacing rules, developers spend less mental energy parsing layout and more on logic, and code reviews stop being cluttered by arguments over style. Prettier became popular precisely because it is opinionated: rather than offering endless knobs, it makes the formatting decisions for you, so an entire team converges on one consistent style automatically. Running code through a beautifier is especially useful when you inherit a messy file, paste code from a source that mangled its whitespace, or need to make a minified file readable again for debugging.
Beautifying versus a build step
This tool is perfect for one-off formatting: a snippet you pasted, a config you want to inspect, or code from a comment thread. For ongoing project work, the same Prettier engine is best wired into your editor and a pre-commit hook so files are formatted automatically every time you save or commit, guaranteeing consistency without anyone thinking about it. The output here matches what a default Prettier setup produces, so what you see is what your project would generate. Treat the web tool as a convenient, install-free way to format code on the spot, and a local Prettier configuration as the way to keep a whole codebase tidy over time.
Worked examples
Minified JS
Inputs: const a={x:1};function f(){return a}
Result: Multi-line, indented JavaScript
Compact JSON
Inputs: {"a":1,"b":[1,2]}
Result: Indented, readable JSON
Glossary
- Prettier
- An opinionated code formatter that enforces a consistent style.
- Beautify
- To reformat code with clean, consistent indentation and spacing.
- Parser
- The component that reads code into a structure Prettier can reformat.
- Indent width
- The number of spaces used for each level of indentation.
Related reading
Frequently Asked Questions
Why use Code Beautifier & Formatter?
- Powered by Prettier, the industry-standard code formatter
- Supports ten languages from JavaScript to YAML and GraphQL
- Selectable two- or four-space indentation
- Runs locally in your browser, so code is never uploaded
Common use cases
- Reformat minified or one-line code into something readable
- Clean up code pasted from a chat, email, or PDF
- Standardise indentation before committing a file
- Pretty-print a JSON or YAML config for inspection
- Tidy a snippet for a blog post or documentation
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