Mello
{} Developer

JavaScript Formatter & Minifier

Format or minify JavaScript — handy for inspecting bundles or formatting snippets.

Runs in your browserNo account requiredNo uploadFree
Loading tool…

About JavaScript Formatter & Minifier

Format an unreadable JS snippet to inspect it, or compress one for inline use.

Frequently asked questions

No — it only reformats it as text.

More developer tools

JSON Formatter & Validator
Paste JSON to format, validate, or minify — runs entirely in your browser.
{}Developer
Base64 Encoder / Decoder
Encode to Base64 or decode it back — handles UTF-8 correctly.
{}Developer
JSON ↔ CSV Converter
Convert between JSON and CSV — round-trip safe, runs locally.
{}Developer
Regex Tester
Build and test JavaScript regular expressions with live highlighting.
{}Developer
UUID / GUID Generator
Generate cryptographically random UUID v4 identifiers.
{}Developer
JSON ↔ YAML Converter
Switch between JSON and YAML — useful for Kubernetes, CI configs, and API specs.
{}Developer