JavaScript Formatter & Beautifier

It rewrites JavaScript code so that blocks, statements, and expressions are properly indented and spaced. The program logic does not change — only whitespace and line breaks are adjusted.

Beautify adds line breaks and indentation so the code is readable in an editor or pull request. Minify strips comments, removes whitespace, and collapses runs of spaces to shrink the file before serving it to users.

No for well-formed code. The minifier preserves quoted strings, template literals, and regex literals. The resulting code executes identically in browsers and Node.js.

Two spaces, four spaces, or a literal tab character. Choose whichever matches your team's style guide or the Prettier / ESLint config in your project.

Yes. Toggle 'Break chained methods' to place each method call on its own line, or leave it off to keep short chains on a single line.

No — it formats whatever you paste. If a brace is unbalanced or a keyword is misspelled, the output will still be invalid, just better-indented. Use a linter for correctness checking.

Yes. js-beautify handles arrow functions, async/await, optional chaining, nullish coalescing, template literals, destructuring, and class fields. It preserves the syntax as-is and adjusts whitespace around it.

No. Formatting and minification run entirely in your browser using js-beautify. Your source code — including proprietary logic, API keys in comments, or business logic — never leaves your device.

Yes. Paste the entire contents of your .js file into the input area, or drop a .js file onto the page. The tool handles files of any size that fit in your browser's memory.