JSON Patch Generator — RFC 6902 Diff Tool

Generate RFC 6902 JSON Patch operations by comparing two JSON objects. Produces add, remove, replace, move, copy, and test operations. 100% client-side.

Source JSON0 chars

Target JSON0 chars

Output—

🛡️Zero server logs. Patch generation runs 100% inside your browser.

JSON Patch Generator — RFC 6902 Diff Tool

Generate RFC 6902 JSON Patch operations by comparing two JSON objects. Produces add, remove, replace, move, copy, and test operations. 100% client-side.

🔒 Client-side only⚡ Web Worker processing🌐 Works offline🛡️ Zero server logs

How to Use

Paste the source JSON (original) into the left editor.
Paste the target JSON (desired) into the right editor.
Click Generate Patch to see the RFC 6902 operations needed to transform source into target.

Frequently Asked Questions

Questions about this tool? We've got answers.

What is JSON Patch?

JSON Patch (RFC 6902) is a lightweight format for describing changes to a JSON document using operations like add, remove, replace, move, copy, and test.

Are nested changes detected?

Yes. The tool does a deep recursive comparison to detect changes at any nesting level, generating precise paths for each operation.

Is my data sent to a server?

No. All comparison runs 100% inside your browser via a Web Worker.

Automated E2E Test Suite Logs

Our build systems validate edge-case processing under extreme conditions before each deployment.

Stability

100.0%

Passed

18/18

Env

V8-Sandbox

Engine: Vitest RunnerUpdated: 2026/7/16 02:08:13📦 Download Test Datasets

PASSgeneratePatch should generate replace patches for changed values

PASSgeneratePatch should return empty array for identical objects

PASSgeneratePatch should generate replace patch for simple change

PASSgeneratePatch should throw on empty source

PASSgeneratePatch should throw on empty target

PASSgeneratePatch should throw on invalid source JSON

PASSgeneratePatch should throw on invalid target JSON

PASSJsonPatchGeneratorTool renders Generate Patch button

PASSJsonPatchGeneratorTool renders Source JSON and Target JSON labels

PASSJsonPatchGeneratorTool renders three textareas

PASSJsonPatchGeneratorTool shows privacy strip

PASSJsonPatchGeneratorTool shows error toast on Generate with empty source

PASSJsonPatchGeneratorTool shows Clear toast on Clear All click

PASSJSON Patch Generator Worker Standard patch generation should generate patch from source to target

PASSJSON Patch Generator Worker Standard patch generation should propagate requestId correctly

PASSJSON Patch Generator Worker Boundary Conditions & Error Handling should return error for invalid JSON source

PASSJSON Patch Generator Worker Boundary Conditions & Error Handling should return error for empty input

PASSJSON Patch Generator Worker Performance Benchmark should generate patch for large objects within acceptable limits

⏱️ 0.18ms📦 1.5KB🎚️ Max Nesting: 3🌿 AST Nodes: 48🛡️ V8 Heap: Healthy

$ codecaven-validator --scope=tool● CLUSTER COMPLIANT

Tool Changelog & Updates

v1.2.02026-06-12

UX: Added Load URL button for loading source JSON from remote URLs using the shared LoadUrlModal component.
UX: Renamed input fields to Source JSON and Target JSON with i18n updates.

1.1.02026-06-11

Feature: Added Web Worker thread-isolated test suite covering patch generation between source and target JSON objects.
Test: Introduced error validation for malformed JSON source and empty inputs.
Performance: Included large object diff (4MB+) stress benchmark with patch generation throughput and memory telemetry.

1.0.02026-06-10

Feature: Initial release