JavaScript Formatter
Make minified or poorly formatted JavaScript readable with spaces or tabs for indentation. All formatting runs in your browser.
JavaScript Formatter
Make minified or poorly formatted JavaScript readable with spaces or tabs for indentation. All formatting runs in your browser.
About JavaScript Formatter
Format with Prettier Babel
The formatter uses Prettier's Babel parser, so it is suited to standard JavaScript snippets, copied browser code, and small module fragments. Syntax errors are reported before the tool returns a formatted result.
Review before minifying
Use the formatter when you need to inspect control flow, copied snippets, or generated code before passing it to a minifier. Readable formatting makes it easier to catch accidental globals, missing braces, and pasted debug statements.
FAQ
Common questions and answers about this topic.
Can I unminify JavaScript and recover the original source code?
The formatter adds line breaks and indentation to JavaScript that its parser can read, making minified code easier to inspect. It cannot recover deleted comments, original variable names, or the source files that existed before bundling, and it does not deobfuscate code or automatically fix syntax errors.
What does this JavaScript formatter do?
It auto-formats your JavaScript code with proper indentation and consistent style, making it easier to read, debug, and maintain.
Can I customize the indentation?
Yes, pick 2 or 4 spaces, or tabs. Most JavaScript style guides recommend 2 spaces.
Does it support TypeScript?
This tool formats standard JavaScript. TypeScript syntax may also work for common patterns, but for full TypeScript support, consider using a dedicated TypeScript formatter.
Is my data sent to any server?
No, JavaScript formatting runs entirely in your browser. Your source code is processed locally and never sent to any external service.