JSON Patch Applier (RFC 6902)
About JSON Patch Applier
The RFC 6902 JSON Patch Applier applies an RFC 6902 JSON Patch operation sequence (`add`, `remove`, `replace`, `move`, `copy`, `test`) to an original JSON document, producing the transformed target document with step-by-step operation tracing.
How to Use JSON Patch Applier
Step 1
Paste your baseline JSON into the "Original JSON" pane.
Step 2
Paste your RFC 6902 JSON Patch array into the "Patch Operations" pane.
Step 3
Inspect the resulting transformed JSON document in real time.
Step 4
Click "Copy Result" or "Download .json".
Practical Use Cases for JSON Patch Applier
HTTP PATCH API Debugging & Testing
Simulate and verify how your backend server or client will apply incoming RFC 6902 JSON Patch instructions.
Collaborative Document State Reconstruction
Replay operational patch sequences onto base state snapshots to verify final document integrity.
Input & Output Examples
Applying Replace and Add Operations
Original: {"title": "Draft"} | Patch: [{"op": "replace", "path": "/title", "value": "Published"}, {"op": "add", "path": "/version", "value": 1}]{\n "title": "Published",\n "version": 1\n}Key Features & Performance
- ✓Strict RFC 6902 compliance: applies `add`, `remove`, `replace`, `move`, `copy`, and `test` operations in order.
- ✓Atomic transaction validation: halts and reports errors if a `test` operation fails or a target path does not exist.
- ✓Dual live editors with JSON syntax validation and formatted output.
- ✓100% Client-Side memory execution guarantees data confidentiality.
- ✓1-Click Copy patched result.
Key Terminology & Definitions
Atomic Patch Evaluation
Applying all patch operations sequentially such that if any operation fails, the entire transaction is rejected without altering state.
Test Operation (`"op": "test"`)
A patch directive that asserts a value at a specified path matches an expected value before applying subsequent operations.