AllJSONTools

About AllJSONTools

A free, developer-first JSON toolkit that runs entirely in your browser.

What is AllJSONTools?

AllJSONTools is a comprehensive collection of 25+ JSON utilities built for developers, data engineers, and anyone who works with JSON on a daily basis. Every tool on this site processes data entirely in your browser — nothing is ever sent to a server.

Whether you need to format messy JSON, compare two API responses, generate TypeScript interfaces from a payload, or convert between JSON and formats like YAML, XML, CSV, TOML, or SQL — AllJSONTools has you covered.

Why We Built This

Most online JSON tools either plaster ads over every surface, require sign-ups, or — worst of all — upload your data to their servers. That felt wrong for something as fundamental as formatting or validating JSON.

AllJSONTools was created to be the JSON toolkit we wanted to use ourselves: fast, private, free, and distraction-free. No accounts, no paywalls, no data collection. Just tools that work.

Core Principles

  • 100% Client-Side — All processing happens in your browser. Your data never touches our servers. Ever.

  • Free Forever — Every tool is free to use with no limits, no sign-ups, and no premium tiers.

  • Works Offline — AllJSONTools is a Progressive Web App (PWA). Install it and use it without an internet connection.

  • Developer-First — Keyboard shortcuts, auto-formatting, real-time validation, and clean interfaces designed for daily use.

What You Can Do

Here is a quick overview of the categories of tools available:

  • Core Tools — JSON Formatter, Diff Checker, Tree Viewer, Schema Generator & Validator, JSONPath Query, JWT Decoder

  • Format Converters — Bidirectional conversion between JSON and YAML, XML, CSV, TOML, TOON, and Query Strings

  • Code Generators — Generate TypeScript, Go, Rust, Kotlin, Pydantic, Zod, Prisma, Protobuf, and GraphQL from JSON

  • One-Way Converters — JSON to Markdown tables, JSON to SQL statements

Tech Stack

AllJSONTools is built with modern web technologies for the best performance and developer experience:

  • Next.js (App Router) with React 19

  • TypeScript (strict mode)

  • Material UI (MUI) v7

  • Deployed on Vercel with Cloudflare DNS

Get in Touch

Have a suggestion, found a bug, or just want to say hi? Reach out via the contact page. We read every message.

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