Before you start
What you need
JavaScript source compatible with the bundled Babel parser.
Developer & Data
JavaScript Formatter
Parse and format JavaScript without executing the source in this browser.
- 01Runs in this browser
- 02Limits are explicit
- 03Copy or download output
No black box
How this tool handles the input
A Babel-compatible parser builds syntax structure and Prettier writes consistent semicolons, quotes, indentation, and line wrapping.
What you get
What the page gives back
Formatted .js text ready for review or download.
Keep in mind
Use the result responsibly
Formatting does not lint logic, detect malicious intent, type-check code, or prove runtime safety.
Practical uses
Where this tool earns its place
- Clean a compressed snippet before debugging.
- Normalize generated JavaScript for review.
- Confirm whether a snippet parses as JavaScript.
Verified data boundary
Source text stays on this page.
The published contract marks these tools as client-only processing. Nirmion uses the API only to confirm that this workspace is enabled in MySQL; source values and results are not sent to Flask.