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DevNest
8 private developer tools that never leave your browser
JSON formatter, JWT decoder, regex tester, Base64 & URL encoders, hash and UUID generators, and a timestamp converter — all running 100% in your browser. Nothing you paste is uploaded or stored. Live results as you type, dark mode, no sign-up.
Hey Product Hunt 👋
I'm the maker of DevNest.
I kept pasting JWTs, API responses and config files into random online tools while debugging — and realised I had no idea whether any of them sent that data to a server. Some of those tokens were live sessions.
So I built DevNest: eight tools I use every week, all running entirely in the browser. There's no backend that could receive your data.
A few things I'm proud of: 🔐 JWT Decoder shows expiry as "expires in 2 hours / expired 3 days ago" — and clearly warns that decoding isn't verifying 🧪 Regex Tester runs in a Web Worker with a timeout, so a catastrophic pattern like (a+)+$ can't freeze your tab #️⃣ Hash Generator does MD5 → SHA-512 for text or files, with HMAC and a "compare with expected checksum" box 🧾 JSON Formatter tells you the exact line and column of an error, with a "jump to error" button
It's free, needs no sign-up, and works on mobile.
What tool should I add next? I'm considering JSON ↔ CSV, a cron expression explainer and a diff checker — I'd love to hear what you use most.
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About DevNest on Product Hunt
“8 private developer tools that never leave your browser”
DevNest was submitted on Product Hunt and earned 2 upvotes and 1 comments, placing #101 on the daily leaderboard. JSON formatter, JWT decoder, regex tester, Base64 & URL encoders, hash and UUID generators, and a timestamp converter — all running 100% in your browser. Nothing you paste is uploaded or stored. Live results as you type, dark mode, no sign-up.
DevNest was featured in Productivity (661.9k followers), Privacy (11.4k followers) and Developer Tools (520.4k followers) on Product Hunt. Together, these topics include over 259.9k products, making this a competitive space to launch in.
Who hunted DevNest?
DevNest was hunted by Pankaj Kumar Gawande. 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 DevNest stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
Pankaj Kumar Gawande