About jsonformat.org
What We Do
jsonformat.org is a free, ad-supported collection of browser-based developer tools. We help developers format, convert, validate, and encode data — instantly, privately, and without any signup.
Every tool on this site runs entirely inside your browser. When you paste a JWT token, format JSON, or generate an HMAC signature, that data never leaves your device. We built the site this way because developers frequently work with sensitive data — API keys, auth tokens, private config files — and they deserve tools that respect that.
Our Tools
We cover the most common daily tasks in a developer's workflow, organized by category:
Our Principles
Privacy by Design
All processing happens in your browser. Zero data is transmitted to any server. You can verify this in your browser's DevTools Network tab.
No Friction
No accounts. No email required. No paywalls. Open any tool and start working immediately. We believe great utilities should be accessible to everyone.
Works Everywhere
Every tool is a single HTML file. No frameworks to load, no build steps. Fast on any device, works offline once cached.
Free, Ad-Supported
Tools are free forever. We display non-intrusive ads via Google AdSense to keep the lights on. Your tool data is never shared with advertisers.
Contact Us
Have a question, found a bug, or want to suggest a new tool? We'd love to hear from you.
Reach us at: our contact page — or use the email listed there for privacy inquiries.
We aim to respond to all messages within 3–5 business days.