About Us | Jsonr

Our Mission

Jsonr (www.freejsonr.com) exists to make working with JSON fast, private and free. Developers, testers, students and data teams deal with JSON every day — and too often the tools they reach for are paywalled, ad-stuffed, slow or quietly upload your data to a server. We built the alternative: a complete toolkit that runs 100% in your browser.

What We Offer

• JSON Formatter & Beautifier — pretty print or minify with custom indentation
• JSON Validator — strict syntax checking with precise error locations
• JSON Compare — structural diff of two documents with highlighted changes
• JSON Viewer — interactive tree view for exploring large files
• JSON Editor — live validation while you write
• Converters — JSON to/from CSV, YAML, XML, plus Dart and Java class generators

Privacy First, Always

The architecture is simple on purpose: there is no backend processing your data because there doesn't need to be. Everything happens in JavaScript on your device, so confidential payloads — internal APIs, customer records, secrets — are safe to paste. Read more in our Privacy Policy.

Free Forever

No accounts, no trials, no rate limits, no locked features. The Site is supported by unobtrusive advertising where available, which lets us keep every tool free for everyone.

Get in Touch

Found a bug, want a new converter, or have feedback? We would genuinely like to hear it — visit the contact page.