How to use this tool
- Paste your JavaScript.
- Click Format to pretty-print it, or Minify to shrink it.
- Copy the result.
Frequently asked questions
- What's the difference between Format and Minify?
- Format adds clean indentation so the code is easy to read and edit. Minify renames local variables, strips whitespace and comments, and applies safe micro-optimizations to produce the smallest working output — useful for shipping to production, not for editing.
- What powers this?
- Formatting uses Prettier, the same formatter widely used in code editors; minifying uses Terser, one of the most widely used JavaScript minifiers (it's what many production build tools use under the hood).
- Does minifying change how my code behaves?
- It shouldn't — Terser only applies transformations it can prove are behavior-preserving. That said, always test minified output before shipping it, the same way you would with any build step.
- Is my code uploaded anywhere?
- No — everything runs entirely in your browser. The code never leaves your device.
How GetByteRush compares
Most free tools for this online work the same way: you upload your file to their server, wait, then download the result — which means your file (and often your email, for a "free" account) sits on someone else's infrastructure. Here's the actual difference:
| Feature | GetByteRush | Typical online tools |
|---|---|---|
| Code ever leaves your device | No — processed in this tab | Yes, uploaded to process |
| Account required | Never | Often, past a certain usage level |
("Typical online tools" reflects publicly documented behavior of common free file-processing sites as of 2026 — always check a specific competitor's own privacy policy and pricing page, since these details change.)