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Tessera
Load a URL and see it on phones/tablets/desktops in canvas
See your web app on phones, tablets, and desktops at once — live, synced viewports at true size and DPR. Capture evidence, share mosaics, or run tessera check for agent-friendly overflow findings.
I got tired of resizing DevTools over and over and still missing a breakpoint, so I made Tessera.
It's a web app where you drop your URL onto an infinite canvas and each tile is an actual browser session at real device dimensions. Phone next to tablet next to desktop, all live. You can click around inside them. There's a sync mode so scrolling one scrolls the others.
Live tiles run on Playwright over a websocket. There's also a plain iframe mode if you don't need the heavy stuff.
About Tessera on Product Hunt
“Load a URL and see it on phones/tablets/desktops in canvas”
Tessera was submitted on Product Hunt and earned 0 upvotes and 7 comments, placing #149 on the daily leaderboard. See your web app on phones, tablets, and desktops at once — live, synced viewports at true size and DPR. Capture evidence, share mosaics, or run tessera check for agent-friendly overflow findings.
On the analytics side, Tessera competes within Design Tools, Developer Tools and Tech — topics that collectively have 1.4M followers on Product Hunt. The dashboard above tracks how Tessera performed against the three products that launched closest to it on the same day.
Who hunted Tessera?
Tessera was hunted by MILL3R. 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 Tessera including community comment highlights and product details, visit the product overview.
MILL3R