DevTilt

JavaScript Formatter

Turn compacted or inconsistently indented JavaScript into readable code. Formatting runs in your browser with js-beautify — your source never leaves the device.

Result

Paste code, then Format. Processing stays in your browser.

How to format JavaScript

  1. Paste JavaScript (not TypeScript or JSX).
  2. Choose indent: 2 spaces, 4 spaces, or tab.
  3. Click Format, or press Ctrl+Enter (Cmd+Enter on Mac).
  4. Copy or download the pretty-printed source.

What is JavaScript Formatter?

Minified bundles and copy-pasted snippets from Stack Overflow are nearly impossible to read or debug. This formatter re-indents JavaScript with consistent brace style and line breaks so you can trace logic, spot syntax errors, and share readable code in reviews.

Why use DevTilt's JavaScript Formatter?

  • Configurable indent size and brace style
  • Handles ES6+ syntax including arrow functions and classes
  • Formats inline and multi-line code blocks
  • Ctrl+Enter shortcut for quick reformatting

Common use cases

  • Reading a minified script pulled from a production bundle
  • Formatting a callback hell snippet before refactoring
  • Preparing JavaScript samples for a technical blog post
  • Making a pasted code snippet readable before code review

FAQ

No. js-beautify runs entirely in your browser. Your code is not sent to DevTilt.
Yes. Use 2 spaces (default), 4 spaces, or tabs. Format is button-driven so large files are not reformatted on every keystroke.
No. Input is treated as JavaScript. TypeScript-only syntax is unsupported. JSX may indent incorrectly — use a dedicated JSX tool or your editor for that.
Inputs over 500KB show a warning. Inputs over 2MB are rejected so the tab stays responsive.
Syntax errors, template literals with nested HTML, or non-JavaScript constructs can confuse the beautifier. Fix parser errors first, or format smaller snippets to isolate the problem line.