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).
DevToolBox
Developer tools that make zero network calls. Verifiable.
Most online developer tools have a dirty secret: they send your pasted data to servers. Analytics endpoints, "improvement" APIs, or just... somewhere. DevToolBox is different. Every tool runs 100% in your browser. Not "we promise" — verifiably. Open your Network tab while using any tool. Nothing fires.
Maker here! The origin story: I caught a popular JSON formatter POSTing my pasted content to a third-party analytics endpoint. After that, I decided to build my own tools where I could *verify* that data stays local.
The architecture is simple: pure JavaScript for all computations, no backend, no API calls. The hosting is static files on a CDN. Even if I wanted to steal your data, the code literally has no mechanism to send it anywhere.
**7 tools at launch:**
• JSON Formatter & Validator
• Regex Tester (real-time highlighting)
• Base64 Encoder/Decoder (UTF-8 aware)
• JWT Decoder (expiry checker)
• Hash Generator (MD5 → SHA-512)
• URL Encoder/Decoder
• Color Converter (HEX/RGB/HSL)
**Why it's different:**
• Zero network calls (verify in DevTools)
• Installable as a PWA (works offline)
• No signup, no account, no tracking
• Sub-90KB per page load
• $0/month to run
Next up: Cron Expression Builder, Timestamp Converter, and a JSON Diff tool. Voting on what comes first in the comments!
How does this hold up for the heavier tools like JSON-to-cSV converters with massive datasets, or does performance start to dip once you get past a few MB?
About DevToolBox on Product Hunt
“Developer tools that make zero network calls. Verifiable.”
DevToolBox was submitted on Product Hunt and earned 0 upvotes and 2 comments, placing #113 on the daily leaderboard. Most online developer tools have a dirty secret: they send your pasted data to servers. Analytics endpoints, "improvement" APIs, or just... somewhere. DevToolBox is different. Every tool runs 100% in your browser. Not "we promise" — verifiably. Open your Network tab while using any tool. Nothing fires.
DevToolBox was featured in Developer Tools (515.9k followers) and Development (6k followers) on Product Hunt. Together, these topics include over 79.6k products, making this a competitive space to launch in.
Who hunted DevToolBox?
DevToolBox was hunted by SRINIVAS ESLAWATH. 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 DevToolBox stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
SRINIVAS ESLAWATH