Original JSON
before01
{02~
"status": "draft",03~
"plan": "starter",04
"user": {05~
"role": "viewer"06
}07
}Built for API payloads
AskJason JSON Workspace
Format messy payloads, compare snapshots, apply JSON Patch operations, and resolve Pointer paths without leaving one focused playground.
4 modes
format, diff, patch, pointer
0 setup
paste JSON and inspect
dev first
keyboard-friendly surfaces
diff / response.json
valid JSONDiffFormatPatchPointer
2 changes found
Changed JSON
after01
{02~
"status": "ready",03~
"plan": "pro",04
"user": {05~
"role": "admin"06
},07+
"timeoutMs": 300008
}Jason status
Patch-ready diff generated.
Review summary
Three fields changed and one timeout setting was added.
AI COPILOT / LIMITED PILOT
Ask for the change. Keep control of the JSON.
Ask Jason routes your request to Formatter, Diff, Patch, or Pointer and exposes every fixed-schema tool call. Rust validates each result. Nothing edits the workspace until you choose Apply.
Account-free · 1 guided session / rolling 24h · 3 turns · 16 KB context
Ask Jason
2 turns left“Set retries to 5 and remove debug.”
tool_callapply_json_patch · 2 operations
tool_resultRust validation passed · proposal only
PROPOSAL
Two safe operations
replace /retries → 5 remove /debug
Apply / Discard
3 turns / 24h
Signed visitor session
4 fixed tools
No shell, network, or URLs
Rust authoritative
Proposal before apply
$20 monthly target
Planned $8 provider hard cap
Core workflow
Four focused tools, one tidy interface.
01
Formatter
Clean up pasted payloads without losing structure.
02
Diff
Compare snapshots with readable change groups.
03
Patch
Generate patch-ready edits from reviewed changes.
04
Pointer
Jump to nested paths and share exact references.
Workflow
One focused loop for understanding structured data.
Paste
Drop in an API response, config file, or webhook body.
Inspect
Format, compare, patch, or resolve the exact nested path.
Copy
Take the formatted JSON, JSON Patch, or resolved value with you.