This product was not featured by Product Hunt yet. It will not be visible on their landing page and won't be ranked (cannot win product of the day regardless of upvotes).
SafeJSON is a privacy-first JSON toolkit for developers. Format, validate, diff JSON and decode JWT tokens — all 100% client-side. Your sensitive data never leaves your browser, no uploads, no tracking. Built after jsonformatter.org leaked 80,000+ user credentials in 2025. Open source & free forever for core formatting features.
Hey Product Hunt! I'm the solo developer behind SafeJSON.
I built this after the jsonformatter.org breach in November 2025 — security researchers found over 80,000 credentials
(AWS keys, GitHub tokens, banking details) publicly exposed through an unprotected feature. The root cause:
server-side processing.
SafeJSON does everything in your browser. Open DevTools → Network tab while using it — zero requests. Your data
literally never leaves your device.
What's included:
- JSON Formatter & Validator (free forever)
- JSON Diff — side-by-side comparison with color-coded changes
- JWT Decoder — decode tokens without sending them to a server
- JSONPath Query & Schema Validator
- Browser extension (Edge Add-ons)
Built with Next.js + Tailwind. MIT licensed. Entire codebase on GitHub.
I'd love feedback on what to build next. What's the one JSON-related task you do manually that you wish was automated?
No comment highlights available yet. Please check back later!
About SafeJSON — Privacy on Product Hunt
“ A JSON formatter that never sees your data ”
SafeJSON — Privacy was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #136 on the daily leaderboard. SafeJSON is a privacy-first JSON toolkit for developers. Format, validate, diff JSON and decode JWT tokens — all 100% client-side. Your sensitive data never leaves your browser, no uploads, no tracking. Built after jsonformatter.org leaked 80,000+ user credentials in 2025. Open source & free forever for core formatting features.
SafeJSON — Privacy was featured in Open Source (68.5k followers), Privacy (11.1k followers), Developer Tools (514k followers) and GitHub (41.3k followers) on Product Hunt. Together, these topics include over 114.8k products, making this a competitive space to launch in.
Who hunted SafeJSON — Privacy?
SafeJSON — Privacy was hunted by JSON-Lee. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
Want to see how SafeJSON — Privacy stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
JSON-Lee