I m working on SafeJSON, a browser-based JSON toolkit for formatting, validating, diffing, decoding JWTs, querying JSONPath, and validating schemas.
The hard part has not been the formatter itself.
The hard part has been explaining privacy in a way that is accurate and believable.
I don t want to use vague claims like 100% private or no tracking, because most modern sites still have normal analytics, payments, licensing, or extension permissions.
SafeJSON is a privacy-first JSON toolkit for developers.
Format, validate, diff JSON and decode JWT tokens — all 100% client-side.
Your sensitive pasted JSON data never leaves your browser, no pasted-content upload, no pasted-content analytics. You can verify this behavior in DevTools Network panel.
Built after jsonformatter.org leaked 80,000+ user credentials in 2025.
