About JSON Web Tools

Free, fast, and private JSON tools for developers — no login, no servers, no nonsense.

What We Do

JSON Web Tools is a free online toolkit with 68+ tools for working with JSON data. From validation and formatting to type generation, data conversion, and schema building — everything a developer needs in one place.

Every tool runs entirely in your browser. Your data never leaves your device.

Our Values

• Privacy first — your data is processed locally, never on our servers
• Always free — no paywalls, no premium tiers, no hidden costs
• No friction — no account, no login, no email required
• Works offline — install as a PWA and use without internet
• Open to all — built for developers at every skill level

Who Built This

JSON Web Tools was built by an independent developer who was tired of switching between 5 different sites just to work with JSON. The goal was simple: one fast, private, no-login toolkit that covers everything.

The site is maintained as a passion project and kept free for the developer community.

What's Included

A few highlights from the 68+ tools available:

• JSON Validator, Formatter & Beautifier
• JWT Decoder
• JSON Diff & Visual Diff
• JSON to TypeScript, Python, Java, Go, C#, Kotlin, Ruby, Rust, Swift, PHP
• JSON ↔ CSV, YAML, XML, SQL, TOML converters
• JSON Repair, JSONPath Evaluator, Schema Validator
• Mock Data Generator, JSON Merge, JSON Patch, and many more

Contact

Have a question, suggestion, or found a bug? We'd love to hear from you.

Email: admin@jsonwebtools.com
Or visit our Contact page.