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All JSON Web Tools

Complete index of every tool, converter, and guide on JSON Web Tools. 100+ utilities, all client-side, all free.

Core JSON Tools

JSON Validator — Validate JSON syntax, get precise error locations
JSON Formatter — Pretty-print and beautify JSON with custom indentation
JSON Beautifier — Reformat ugly JSON into readable form
JSON Minifier — Remove whitespace to shrink payload size
JSON Pretty Print — Format JSON with adjustable spacing
JSON Repair — Fix common syntax errors automatically
JSON Tree View — Browse JSON as a collapsible tree
Stringify / Parse — Convert between JS objects and JSON strings
JSON Stringify — Stringify with pretty-print options
Formatter Styles — Multiple formatting style presets

Comparison & Diff

JSON Diff — Find differences between two JSON documents
Visual JSON Diff — Side-by-side visual comparison
JSON Merge — Merge two JSON objects with conflict resolution
Advanced Merge — Deep merge with custom rules
JSON Patch (RFC 6902) — Apply RFC 6902 patches
Duplicate Keys Detector — Find duplicate keys in JSON objects

Format Converters (JSON ↔ Other Formats)

JSON to CSV — Convert JSON arrays to CSV files
CSV to JSON — Parse CSV into JSON objects
JSON to YAML — Convert JSON to readable YAML
YAML to JSON — Parse YAML into JSON
JSON to XML — Convert JSON to XML
XML to JSON — Parse XML into JSON
JSON to SQL — Generate SQL INSERT statements
JSON to Excel — Export JSON to .xlsx format
JSON to HTML Table — Render JSON as HTML table
TOML to JSON — Convert TOML config to JSON
JSON to .env — Convert JSON to environment variables
NDJSON Converter — Newline-delimited JSON tools

Code Generation (JSON to Programming Languages)

JSON to TypeScript — Generate type interfaces
JSON to Python — Generate dataclasses and TypedDicts
JSON to Go — Generate Go structs with JSON tags
JSON to Rust — Generate serde-compatible structs
JSON to Java — Generate Java POJOs
JSON to C# — Generate C# classes with JsonProperty
JSON to Swift — Generate Codable structs
JSON to Kotlin — Generate data classes
JSON to PHP — Generate PHP classes
JSON to Ruby — Generate Ruby classes

Schema & API Generation

JSON Schema Validator — Validate against any JSON Schema
JSON Schema Generator — Generate schemas from JSON samples
Schema Examples — 20+ copy-paste patterns
JSON to GraphQL — Generate GraphQL schemas
JSON to Protobuf — Generate .proto definitions
JSON to OpenAPI — Generate OpenAPI specs
JSON to SQL Schema — Generate CREATE TABLE statements
JSON to Prisma — Generate Prisma schema models
JSON to Avro — Generate Avro schemas
JSON to Zod — Generate Zod runtime validators
JSON to Mongoose — Generate Mongoose schemas
Custom Validator — Build custom validation rules
Batch Validator — Validate many documents at once

JSONPath & Querying

JSONPath Online — Run JSONPath queries against any JSON
JSONPath Builder — Build JSONPath expressions interactively
JSON Search — Search keys and values across JSON
Value Extractor — Extract specific paths from JSON
JSON Pointer (RFC 6901) — Resolve JSON Pointer references
Array Operations — Sort, filter, map, reduce JSON arrays
Data Transform — Transform JSON shape with rules

Encoding, Security & JWT

JWT Decoder — Decode JWT tokens, see header and payload
Base64 Encode/Decode — Base64 with JSON-friendly handling
URL Encode/Decode — Percent-encode JSON values
JSON Escape/Unescape — Handle escape sequences
JSON Masking — Redact sensitive fields
Security Scanner — Scan JSON for XSS, SQLi, secrets

Performance & Analysis

JSON Benchmark — Benchmark parse/stringify performance
JSON Optimizer — Reduce JSON payload size
Size Analyzer — Find the biggest fields in your JSON
Mock Generator — Generate realistic mock JSON data
Mock Data Templates — Pre-built mock data templates
JSON Flatten — Flatten nested JSON to dot notation
JSON Sort Keys — Sort object keys alphabetically
Regex Generator — Generate regex from JSON patterns

API Testing

JSON API Tester — Test REST APIs with curl-like syntax
Webhook Tester — Inspect incoming webhooks
JSON Playground — Interactive JSON sandbox

Guides & Tutorials

JSON Schema Tutorial — Start-from-zero introduction
Complete Schema Guide — Full keyword reference
oneOf vs anyOf vs allOf — Composition keywords explained
JSONPath Tutorial — Operators and live examples
JWT Tutorial — JWT explained from scratch
JWT vs Session vs PASETO — Auth token comparison
Validator Library Comparison — JSON Schema vs Zod vs TypeBox vs Yup vs Joi
JSON Best Practices — Naming, versioning, errors
JSON in Modern JavaScript — ES6+ patterns
Syntax Error Guide — Diagnose every parse error
JSON to CSV Guide — Conversion deep dive
JSON Escape Guide — Escape sequences explained
JSON to TypeScript Guide — Generation strategies
JSON Compression — gzip vs brotli vs MessagePack
JSON Performance — Optimization techniques
JSON Security — Common vulnerabilities
JSON API Design — REST API patterns
JSON in Databases — JSONB, document stores
Interview Questions — Common JSON interview topics
JSON Cheatsheet — Quick reference
What is JSON? — Introduction for beginners
JSON vs XML — Format comparison
JSON vs YAML — Format comparison
How to Validate JSON — Validation methods
Blog — All long-form posts
Changelog — Recent updates
FAQ — Frequently asked questions

Don't See What You Need?

This is a solo project. New tools and guides are added when real users ask for them. If a workflow is missing, send a quick email to admin@jsonwebtools.com describing the use case — most additions to this list started as a single user request. See the Contact page for more channels, or the About page for the project's background.

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