JSON Helper — Pretty • Minify • Validate
Extension Actions
Quick JSON tools: pretty print, minify, key sort, validate, copy & download. Works fully offline. No permissions.
SON Helper is a small, single-purpose tool for working with JSON directly in your browser. Paste raw JSON or import a .json file, then Pretty print, Minify, Validate, and Sort keys (deeply) with a click. Choose your preferred indentation (2/4/8 spaces), Copy Output to the clipboard, or Download the result as a file.
Why it’s safe and easy to approve
No permissions required (no tabs, no storage, no clipboard permission).
Works fully offline — your data never leaves the browser.
No background tasks and no access to websites.
No tracking, no analytics, no external network requests.
Key features
Pretty print for readable, consistent formatting.
Minify to shrink payload size.
Validate with helpful error messages, including line & column hints.
Sort keys recursively for deterministic diffs and cleaner reviews.
Copy/Download the output instantly; Import a .json file with a click.
Clean, professional UI that’s fast, accessible, and distraction-free.
Perfect for developers, QA, writers, and anyone who handles JSON and wants a quick, privacy-first workflow inside a lightweight popup.