JSON Editor
A fast, private JSON editor — everything stays in your browser.
Click the puzzle icon in Chrome's toolbar, then the pin next to JSON Editor.
Get started in seconds
Open the editor
Click the JSON Editor icon in your toolbar (pin it above so it's always one click away).
Paste or format JSON
Drop in any JSON — it's instantly formatted, validated, and shown as an explorable tree.
Try a Pro tool free
Query, schema-validate, diff, or convert — each gives you 5 free uses before Pro.
Where to find it: The toolbar icon (pin it above) and the right-click context menu.
What you can do
Format & validate
Beautify, minify, and catch errors as you type.
Tree view
Explore and edit deeply nested JSON as a collapsible tree.
Side-by-side diff
Compare two documents in a merge-style view.
Semantic diff Pro
Structural comparison that ignores key order and formatting.
JSON Schema validation Pro
Validate a document against a schema with inline errors.
Format conversion Pro
Convert between JSON and YAML, CSV, XML, and TOML.
JSONPath / JMESPath query Pro
Query and filter large documents with path expressions.
Multi-tab editing Pro
Keep several documents open side by side.
Up to 25 MB files Pro
Open and edit large documents past the free size cap.
Custom editor font Pro
Set your preferred editor font size and family.
Your privacy & permissions
Your JSON is processed entirely in your browser. Nothing is uploaded; we never sell data or show ads.
Ready for more?
$29 Lifetime
One purchase unlocks every Pro tool with no limits, on all your devices — no subscription, ever.