JSONifier
Auto-detects JSON on any page and formats it beautifully. Syntax highlighting, collapsible nodes, copy button. Like a built-in JSON viewer.
Auto-detects JSON in page content — no manual triggering
Syntax highlighting with color themes
Collapsible/expandable nodes for nested objects and arrays
Copy formatted JSON button
Raw/formatted toggle — switch between views
Path display — hover any node to see its JSON path
100% local — no servers, no tracking
JSONifier auto-detects JSON on any page and formats it beautifully. Syntax highlighting, collapsible nodes, copy button. No more raw JSON walls.
How it works
- Visit a URL that returns JSON (like a REST API endpoint)
- JSONifier detects the JSON content automatically
- Formatted view appears — syntax highlighting, collapsible nodes
- Toggle raw/formatted — switch between views anytime
- Copy button — copy formatted JSON to clipboard
Privacy
JSONifier doesn’t collect any data. No analytics, no tracking, no telemetry. All formatting happens in your browser — no content is sent to any server.
Free forever
JSONifier is 100% free. All features are available to everyone. There are no premium tiers, no locked features, no usage limits. If you enjoy it, you can buy me a coffee — but there’s zero pressure.
How would you rate JSONifier?
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Frequently asked questions
Is JSONifier really free?
Yes, 100% free. No premium tiers, no locked features.
How does JSONifier detect JSON?
JSONifier checks the page's Content-Type header for application/json. It also does a lightweight check on the first non-whitespace characters — if they're { or [, it tries to parse the page as JSON.
Does JSONifier work with API responses?
Yes. If you visit a URL that returns JSON directly (like a REST API endpoint), JSONifier formats it automatically. No need for a separate JSON viewer extension.
Does JSONifier modify the original JSON?
No. JSONifier creates a formatted overlay. The original JSON is untouched — you can toggle between raw and formatted views anytime.
Does JSONifier track what I'm viewing?
No. JSONifier doesn't collect any data. No analytics, no tracking. All formatting happens in your browser.