What does JavaScript Formatter actually do?

The JavaScript formatter beautifies or minifies JS and TS with Prettier. It does not typecheck, bundle, or execute the program. Syntax errors stop the format.

When should I use JavaScript Formatter?

Use it to clean a snippet before you paste it into a PR.

When should I not use JavaScript Formatter?

Do not use it to compile TypeScript or to ship minified app code.

What does JavaScript Formatter not do?

Does not run the code or report type errors. Minify here is not a production bundler (no tree-shaking).

JavaScript Formatter

Beautify or minify JavaScript / TypeScript using Prettier. Free online — runs locally, no upload.

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JavaScript Formatter