All Tools About Blog Code Examples MCP Server — Use tools from AI agents
Workflows Paste Anything — Smart Detector Tool Pipeline Builder Bulk / Batch Processor
JSON Tools JSON Formatter & Beautifier JSON Validator JSON to CSV Converter JSON to TypeScript Generator JSON to Python Converter JSON Flatten & Unflatten jq Playground — JSON Processor JSON Mock Data Generator JSON Schema Validator JSONPath Evaluator JSON Schema Generator JSON Patch / Diff Generator
Encoding Tools Base64 Encoder / Decoder URL Encoder / Decoder Hash Generator (MD5/SHA) JWT Decoder HTML Entity Encoder / Decoder Image to Base64 Converter String Escape / Unescape Tool ASCII / Binary / Hex Converter Protobuf Decoder — Wire Format Viewer Encoding Detective — Mojibake Repair
Formatters HTML Beautifier XML Formatter & Validator SQL Formatter & Beautifier CSS Minifier & Beautifier JavaScript Minifier & Beautifier TOML Formatter & Converter YAML Formatter, Validator & Minifier
Generators UUID Generator Password Generator QR Code Generator Lorem Ipsum Generator Cron Expression Generator chmod Calculator Slug / URL Generator .gitignore Generator
Testing Tools Regex Tester Regex Explainer — Plain English
Security Tools HMAC Generator Content Security Policy Generator SSH Key Generator SSL Certificate Decoder CORS Header Builder & Generator
Design Tools Color Picker & Converter Placeholder Image Generator SVG Path Editor & Visualizer
Comparison Tools Diff Checker / Text Compare .env Diff & Merge
Converters JSON-YAML Converter Epoch / Unix Timestamp Converter Markdown to HTML Preview Curl to Fetch/Axios Converter Tailwind CSS Converter OpenAPI to TypeScript Text Case Converter Number Base Converter CSV Viewer & Editor Date & Time Format Converter SQL to MongoDB & N1QL Converter Semver Calculator & Comparator Byte / Size Calculator URL Parser & Builder Glob to Regex Converter Math Expression Evaluator SQL DDL to TypeScript Converter Duration / Time Calculator CSS Unit Converter — px, rem, em, pt, vw, vh JSON to Go Struct Converter HTML to Markdown Converter CSV to SQL Converter SQL to ORM Converter
Reference HTTP Status Code Explorer Git Command Builder GraphQL Schema Explorer MIME Type Lookup
Text Tools Word & Character Counter Text Line Sorter, Deduplicator & Tools
Networking Tools Subnet / CIDR Calculator
DevOps Tools Nginx Config Generator Docker Compose Validator Robots.txt Generator & Validator GitHub Actions YAML Validator

JSON Patch / Diff Generator

Generate RFC 6902 JSON Patch operations by diffing two JSON objects, or apply a patch to a document. Structural JSON comparison — not line-by-line text diff.

Your data never leaves your browser Available via MCP
Next steps
JSON Formatter → JSON Validator → Diff Checker → Schema Generator →

How to Use

  1. Select Generate Patch mode to diff two JSON objects.
  2. Paste the original JSON in the left panel and modified JSON in the right panel.
  3. Click Generate Patch to see the RFC 6902 operations.
  4. Switch to Apply Patch mode to apply a patch array to a document.

Understanding JSON Patch Operations

JSON Patch defines six operations: add (insert a value), remove (delete a value), replace (change a value), move (relocate a value), copy (duplicate a value), and test (verify a value). Each operation includes an op field, a path (JSON Pointer), and optionally a value or from field.

Use Cases

  • API versioning — compute minimal diffs between API responses
  • Configuration management — track changes to config files
  • Database migrations — generate update operations from schema diffs
  • Real-time sync — send only changed fields over the wire (like CRDTs)

Related Tools

Format JSON output with the JSON Formatter. Validate JSON syntax with the JSON Validator. Compare text line-by-line with the Diff Checker. Generate schemas from JSON with the JSON Schema Generator. Convert JSON to YAML with the JSON-YAML Converter.

Frequently Asked Questions

What is JSON Patch (RFC 6902)?
JSON Patch is a standard format for describing changes to a JSON document. It uses an array of operation objects (add, remove, replace, move, copy, test) with JSON Pointer paths to specify exact locations of changes.
How is JSON Patch different from a text diff?
Text diff compares line-by-line without understanding structure. JSON Patch is a semantic diff that understands JSON structure — it knows the difference between adding a key, modifying a value, and reordering array elements. The output is itself valid JSON that can be programmatically applied.
What is JSON Pointer?
JSON Pointer (RFC 6901) is a syntax for identifying specific values within a JSON document. Paths use "/" as separator: "/address/city" refers to the "city" key inside "address". Array indices are numeric: "/tags/0" refers to the first element.
Can I apply a patch to a document?
Yes. Switch to "Apply Patch" mode, paste your document and a patch array, and the tool will produce the patched result.
Is my data safe?
Yes. All diff generation and patch application happens entirely in your browser. No data is sent to any server.

Related Tools

JSON Formatter & Beautifier

Format and beautify JSON data with syntax highlighting and tree view.

JSON Validator

Validate JSON syntax with detailed error messages.

JSON to CSV Converter

Convert between JSON arrays and CSV format with custom delimiters.

JSON to TypeScript Generator

Generate TypeScript interfaces and types from JSON data instantly.

JSON to Python Converter

Convert JSON to Python dataclasses, Pydantic models, or TypedDict with automatic type inference.

Use this tool from AI agents. The CodeTidy MCP Server lets Claude, Cursor, and other AI agents use this tool and 46 others directly. One command: npx @codetidy/mcp

Drop file to load