Built for Developers Who Value Their Privacy
JSON Buddy is a collection of 17 free, browser-based tools for working with JSON, XML, YAML, JWTs, and QR codes. No signup. No data stored. No server ever sees your input.
What We Believe
Private by Design
Every tool runs entirely in your browser. We never see, store, or transmit your data — not even for analytics. What you paste stays on your machine.
Free Forever
All 17 tools are free with no account, no rate limits, and no paywall. The site is supported by non-intrusive ads so the tools can stay free.
Instant Results
No server round-trips means no waiting. Results appear as fast as your browser can compute — even on a slow connection or offline.
No Signup Required
Open a tool, paste your data, get results. There is no registration, no email verification, and no account of any kind.
Works Offline
Once the page loads, all tools keep working without an internet connection. There are no API calls during normal use.
Built for Developers
Keyboard shortcuts, copy-to-clipboard, one-click downloads, dark mode, and syntax highlighting — details that matter when you use a tool dozens of times a day.
Why JSON Buddy Exists
Developer tools on the web have a problem: most of them send your data to a server. That matters when you are working with API responses, config files, tokens, or anything that might contain credentials or sensitive business logic.
JSON Buddy was built to be different. Every conversion, diff, format, decode, and QR operation runs entirely inside your browser using JavaScript. There is no backend. There is no database. There is no queue that your pasted text passes through on its way to the result.
The second goal was simplicity. There are no ads blocking the editor. There are no modal prompts asking you to sign up before you can use a tool. You open the page, you get the tool — immediately.
The site is supported by non-intrusive display ads so everything stays free. That is the whole business model.
17 Free Tools, Four Categories
Converters
7 tools to convert between JSON, XML, YAML, and plain text in any direction.
Formatters
Beautify, minify, and validate JSON, XML, and YAML with instant error highlighting.
Compare & Diff
Side-by-side diff for JSON, YAML, XML, and plain text with deep structural comparison.
Utilities
Decode JWTs, generate QR codes, and read QR codes from images — all offline-capable.
Try a tool now
17 free tools, no account needed. Paste your data and get instant results — privately, in your browser.
Open JSON Formatter