JavaScript Formatter
Beautify messy JavaScript with proper indentation—or minify for deploy. All client-side, free, no signup. Case Modify runs this tool in your browser—free, private, no signup.
About JavaScript Formatter
The JavaScript Formatter pretty-prints functions, objects, and modules with stable indentation, or minifies scripts for production. It supports quick cleanup of bundles copied from stack traces, bookmarklets, or legacy pages.
How to Use JavaScript Formatter
Paste JavaScript source into the input panel. Click Format JavaScript to expand blocks and align braces. Use Minify JavaScript to produce a compact build artifact. Copy the formatted code back into your repo or sandbox.
When to Use JavaScript Formatter
Application development: Review minified third-party snippets before integration. Debugging: Beautify code logged from error reports or browser extensions. Interviews & teaching: Present readable examples during live coding sessions. Build prep: Generate a minified version when you do not have a bundler handy.
Why Use This JavaScript Formatter?
Consistent formatting makes logic flow obvious and reduces merge conflicts during reviews. Running locally in the browser keeps proprietary code off remote format servers unless you choose to share it.