About JSONKit
JSONKit is a suite of browser-based JSON tools built for developers. Every tool runs entirely in your browser — your data is never sent to any server.
Our Mission
Developers spend hours every week formatting, validating and converting JSON. We built JSONKit to make those tasks instant. No file upload, no waiting — just paste your JSON and get the result in one click.
How It Works
Every tool on JSONKit processes your data using JavaScript running directly in your browser. When you paste JSON into the formatter, it never leaves your device. This means JSONKit is safe to use with sensitive API responses, authentication tokens, and private configuration files.
All Tools
JSON Formatter
Beautify and format JSON with proper indentation
JSON Validator
Find syntax errors with exact line and column numbers
JSON Minifier
Compress JSON and see exactly how many bytes you save
JSON to CSV
Export JSON arrays to spreadsheet-ready CSV
JSON to YAML
Convert JSON to YAML and back
JSON to XML
Convert JSON to well-formed XML
JSON Diff
Compare two JSON objects and see every difference
JWT Decoder
Decode and inspect JWT tokens safely in your browser
Privacy
JSONKit does not collect, store or transmit any JSON data you paste into the tools. We use anonymous analytics (page views only) to understand which tools are most used. We do not use cookies for tracking. Read our full Privacy Policy.
Open Source
JSONKit is built with Next.js, TypeScript and Tailwind CSS. The JSON processing logic is pure JavaScript with no external dependencies — just the native browser JSON.parse and JSON.stringify.
Contact
Have a feature request or found a bug? We would love to hear from you. The best way to reach us is through the feedback button on any tool page.