Developer Tools
JavaScript Formatter
Format compact JavaScript into readable, indented source directly in your browser.
Output will appear here.
What this tool does
This JavaScript formatter turns pasted JS snippets into cleaner line-broken code for debugging, examples, reviews, and documentation without uploading your source.
Common use cases
Pretty-print compact JavaScript snippets into readable blocks and statements for debugging, examples, and documentation.
Use JavaScript Formatter when you are working with copied API payloads, logs, encoded values, config snippets, identifiers, or debugging data and need a quick browser-local check before pasting the result into docs, tickets, tests, or another developer tool.
How to use it
- Paste compact or messy JavaScript into the input box.
- Review the formatted output with blocks and statements on separate lines.
- Use it for snippets, docs, test fixtures, and small source examples within the browser text limit.
- Copy the formatted JavaScript for editing, QA, or sharing.
Example workflow
Copy a small payload or encoded value from an API response, request URL, log line, or config file. Run the focused check here, confirm the output is readable, then continue with related developer data tools such as validation, formatting, decoding, timestamp conversion, or CSV/JSON conversion.
Privacy note
Client-side only: JavaScript text is formatted in your browser and is not uploaded or executed.
FAQ
Does the JavaScript formatter execute my code?
No. It treats JavaScript as plain text and displays formatted output safely as text.
Is my JavaScript uploaded?
No. Formatting runs locally in your browser.
What snippets work best?
It is designed for small pasted snippets, examples, test fixtures, and compact source blocks within the browser text limit.
Explore more tools
Browse the Developer Tools hub or continue with the Developer Data Toolkit when this task is part of a larger workflow.