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Calibrly
Upload an HTML file and inspect every pixel of it
Calibrly is a browser-based inspection tool for HTML files. Upload a file and inspect spacing, typography, colors, the box model, and WCAG contrast ratios — then export what you find as computed CSS or Tailwind utility classes. No install, no extension, no DevTools digging. Built for developers and designers who need to check someone else's markup fast. Free plan: 5 uploads per month.
Hey Product Hunt 👋
I'm Milan, a solo developer. I built Calibrly because I kept running into the same annoying loop: someone sends me an HTML file — a template, an email, a handoff from a designer — and to check whether the spacing and type are actually right, I'd open DevTools and spend ten minutes clicking through the elements tree.
Calibrly does that in one step. You drop in the HTML file, hover over anything, and see the spacing, typography, colors, box model, and WCAG contrast ratio right there. When something's off, you export the fix as computed CSS or Tailwind classes.
What it does today:
🔍 Hover inspection with a live tooltip
📏 Measure mode — pixel distance between any two elements
🎨 Color + WCAG AA/AAA contrast check
📦 Box model breakdown
📤 Export to CSS or Tailwind
Who it's for: front-end devs reviewing handoffs, designers checking implementation, anyone auditing markup they didn't write.
It's free — 5 uploads a month, no card, Google sign-in only. There's a paid plan coming, but I wanted to see how people actually use this before I charge for it.
I'd really like feedback on two things: does the inspection tooltip show what you'd actually want to see, and is the upload flow the right model — or would you rather this were a browser extension that works on live sites? That's the next thing I'm considering building and I genuinely don't know which way to go.
Thanks for taking a look 🙏
About Calibrly on Product Hunt
“Upload an HTML file and inspect every pixel of it”
Calibrly was submitted on Product Hunt and earned 2 upvotes and 1 comments, placing #138 on the daily leaderboard. Calibrly is a browser-based inspection tool for HTML files. Upload a file and inspect spacing, typography, colors, the box model, and WCAG contrast ratios — then export what you find as computed CSS or Tailwind utility classes. No install, no extension, no DevTools digging. Built for developers and designers who need to check someone else's markup fast. Free plan: 5 uploads per month.
On the analytics side, Calibrly competes within Web App, Design Tools and Developer Tools — topics that collectively have 905k followers on Product Hunt. The dashboard above tracks how Calibrly performed against the three products that launched closest to it on the same day.
Who hunted Calibrly?
Calibrly was hunted by Milan . 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 Calibrly including community comment highlights and product details, visit the product overview.
Milan 