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JavaScriptフォーマッター

コードを実行せず、ローカルで JavaScript を整形します。

Tool controls, results and detailed help are currently in English.

JavaScript formatter

Your data. Your device. Clear results.

Runs on your device
Processed on your device. Never uploaded.

Maximum input: 2 MB (2,000,000 bytes). Maximum output: 8 MB. Processing stops after 15 seconds; your original input is kept. Format supports JavaScript modules and JSX. For Minify, choose ES module for module code (including top-level await). Minify accepts JavaScript, not JSX or TypeScript; it does not rename variables or run your code. To minify JSX, compile it with your own build tools first.

About

コードを実行せず、ローカルで JavaScript を整形します。

Readable code without running it

Formatting parses JavaScript but does not execute it. Syntax colouring is a reading aid. It is not a security audit or a substitute for tests.

Conservative minification

Minification removes unnecessary formatting without compression or variable renaming. Check the result in your own application before shipping it.

Try this

Choose Load example, then Format to expand the greeting function. Minify removes formatting without running it. For a .mjs file, the ES module option is selected automatically.

Use the result as one part of your troubleshooting. Network information can change over time.

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