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devkits.vip
178 Free Developer Tools — 100% Local, No Upload, No Sign-up
Over the past months, I shipped **178 developer tools** that all share one rule: **your data never leaves your browser.** No uploads. No accounts. No tracking. Just paste your JSON, YAML, Base64 string, JWT token, SQL query, or image into the browser — and get instant results. Every tool runs entirely client-side.
Hey Product Hunt! I'm Kuper, the solo dev behind devkits.
**Why I built this:** Every time I needed a JSON formatter or a JWT decoder, the top Google result was plastered with ads and a "pro plan" upsell. I wanted tools I could actually trust — and ones where I could open DevTools, check the network tab, and see zero outbound requests.
So I built 178 of them. Every one runs 100% client-side. No uploads, no accounts, no tracking.
**My favorite technical detail:** The PrefetchLink component (open source in the repo). Next.js 15's `` disables both viewport AND hover prefetch — which kills the instant-navigation feel on slow connections. My wrapper uses `router.prefetch()` on hover/focus/touchstart, sharing one global Set for dedup. If you build with Next.js, steal this pattern.
**Ask:** Try decoding a JWT, converting a CSL to JSON, or generating an OTP. If you find a tool you wish existed, tell me in the comments — I add new tools every week.
Happy to answer questions!
About devkits.vip on Product Hunt
“178 Free Developer Tools — 100% Local, No Upload, No Sign-up”
devkits.vip was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #136 on the daily leaderboard. Over the past months, I shipped **178 developer tools** that all share one rule: **your data never leaves your browser.** No uploads. No accounts. No tracking. Just paste your JSON, YAML, Base64 string, JWT token, SQL query, or image into the browser — and get instant results. Every tool runs entirely client-side.
On the analytics side, devkits.vip competes within Productivity, Privacy and Developer Tools — topics that collectively have 1.2M followers on Product Hunt. The dashboard above tracks how devkits.vip performed against the three products that launched closest to it on the same day.
Who hunted devkits.vip?
devkits.vip was hunted by New User. 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.
For a complete overview of devkits.vip including community comment highlights and product details, visit the product overview.
New User