Free JavaScript Minifier & Beautifier
Runs locallyUpdated October 25, 2026
Pretty-print compressed JavaScript snippets for readable debugging or collapse whitespace for small inline scripts locally in your browser.
How to use JavaScript Minifier / Beautifier
Paste a JavaScript snippet into the editor.
Select Beautify to expand braces and indent lines, or Minify to collapse whitespace.
Ensure every statement ends with an explicit semicolon (;) before minifying, and test the output in your browser console.
Unpack compressed JavaScript snippets or compact small scripts
When auditing third-party analytics snippets, GTM custom HTML tags, or small inline helpers, reading single-line code is slow. Use this free JavaScript beautifier and minifier to format code locally in your browser without uploading proprietary scripts.
When to use this tool vs. dedicated parsers
| Task | Recommended Tool | Why |
|---|---|---|
Reading a compressed inline <script> | JS Beautifier (this tool) | Expands braces and statements onto readable lines immediately |
| Validating API responses or JSON-LD | JSON Formatter & Validator | Enforces strict RFC 8259 JSON syntax and highlights line errors |
| Comparing two script revisions | Text Difference Checker | Beautify both scripts first, then compare line-by-line diffs |
JavaScript Minifier / Beautifier FAQs
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