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22 developer tools in one keyboard-first app — JSON editor, PDF toolkit, JWT decoder, regex tester, hash, QR, cron, color, diagrams, converters. Everything runs 100% in your browser: no backend, no accounts, no uploads. Your data never leaves the tab, and the whole suite keeps working offline (only live currency rates need a network, and it says so). Depth over count: JSON Schema validation, realdocx + text PDF export, ReDoS-safe regex, diagrams that sync text and canvas both ways. Free.
Hey Product Hunt 👋
OneUtiL started as a bookmarks folder. One site for JSON, another for base64, a third for cron, each with its own layout and its own idea of what a dark theme is. Then one day I pasted a real staging JWT into a decoder I'd never looked at twice, and thought about where that just went.
So the rule for this project became: nothing leaves your tab. There's no backend at all — it's a static site, 22 tools, everything computed in the browser. Turn your Wi-Fi off and the whole suite still works. That's not a bonus feature, it's the proof; nothing that phones home could do it.
Three things I'd like your take on:
Diagram Studio is the part I'm least sure about. Text is the source of truth — write SQL and the ERD draws itself, drag nodes and the text rewrites to match. Four types so far (ERD, sequence, flowchart, architecture). Does the two-way sync survive contact with your real schemas?
The one exception: Currency Converter fetches live ECB rates from Frankfurter. I labelled it rather than dropping the tool or making a quiet request. Right call?
What's missing? I'd rather add three tools you actually reach for than twelve to round out the number.
On money, so it's not a surprise later: it's free with no account and no paid tier, and I'll be running ads to cover hosting. The tools stay free and stay local either way — ads don't change where your data goes, which is nowhere.
I'll be here all day. Tell me what's broken.
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About OneUtil on Product Hunt
“A Roof for all utilities.”
OneUtil was submitted on Product Hunt and earned 3 upvotes and 1 comments, placing #160 on the daily leaderboard. 22 developer tools in one keyboard-first app — JSON editor, PDF toolkit, JWT decoder, regex tester, hash, QR, cron, color, diagrams, converters. Everything runs 100% in your browser: no backend, no accounts, no uploads. Your data never leaves the tab, and the whole suite keeps working offline (only live currency rates need a network, and it says so). Depth over count: JSON Schema validation, realdocx + text PDF export, ReDoS-safe regex, diagrams that sync text and canvas both ways. Free.
OneUtil was featured in Design Tools (261.8k followers), Productivity (658.2k followers) and Developer Tools (517.4k followers) on Product Hunt. Together, these topics include over 273.3k products, making this a competitive space to launch in.
Who hunted OneUtil?
OneUtil was hunted by Gopal Khichar. 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.
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Gopal Khichar