Free online tool for JSON merge, compare, validate and more
Monitor coding agents from your Mac's notch and get notified when they need you
Stage
Not given
Not given
Founded
Not given
Not given
Based in
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DK
Pricing model
Free
Paid
Pricing
Completely free, no login required, no subscription, no hidden fees.
€19 one-time personal licence with one year of updates, then €9/year for additional updates. Team plans: €75/year for 5 Macs (€15 per Mac), €140/year for 10 Macs (€14 per Mac), €300/year for 25 Macs (€12 per Mac). 7-day free trial.
Key features
Merge JSON files with conflict resolution algorithms
Handle nested structures and complex objects with precision
Visual side-by-side diff tool
Instant online processing
No login required
Client-side data processing for security
Handle large JSON files efficiently
Compare different JSON files
Validate JSON against schemas
Monitor multiple coding agents with status indicators (working, done, waiting)
Approve or deny agent requests directly from the notch without leaving your workflow
Jump to the exact terminal tab or editor window where an agent is running
Answer agent questions directly from the notch for supported agents
Smart notifications that respect Focus modes, Zoom calls and screen sharing
Display model costs and context window usage for each agent run
Connect to agents running on remote Linux servers over SSH
Support for custom agents via JSON webhook
Keyboard shortcuts for common actions (⌘Y to allow, ⌘N to deny)
What makes it different
100% free with no login, subscription or hidden fees
Data never stored after processing with client-side security
Handles complex nested structures and arrays with precision
Visual intuitive interface with side-by-side comparison
Instant processing without long wait times
Works with 30+ coding agents out of the box, all monitored in one place
Answer agent requests without context-switching, directly from the notch
Notifications that respect your Focus, calls and screen sharing to stay distraction-free
One-time personal licence with ongoing free updates for a year, then optional €9/year
No telemetry, no account required, and all sessions stay on your Mac
JSON Merge
Gnista