Calibrate your screen once, then preview any file — label, card, flyer, package — at its exact real-world dimensions. Catch readability issues before they hit the printer.
No special hardware, no plugins, no installation — just your browser and something to measure with.
Hold a physical 100 mm ruler — or a standard credit card (85.6 × 54 mm) — against your screen. Drag the on-screen ruler until it matches. Your personal px / mm ratio is saved locally for next time.
Type in the exact width and height in millimetres. The tool instantly draws a preview rectangle at precisely that physical size on your screen — what you see is what will print.
Drop in your artwork, label PDF export, or screenshot. Zoom, pan, and compare two areas side-by-side. Is that 6 pt footnote actually readable? You'll know before spending a single sheet of paper.
Built for designers, packaging engineers, and anyone who needs to be sure before committing to a print run.
The screen element matches real-world mm exactly after calibration — not an approximation.
Define two areas at once — compare a current label version against a revised one in the same view.
Load any image file — PNG, JPEG, exported PDF page — with Contain, Cover, or exact-mm placement modes plus drag-to-reposition.
Hit Print — the layout switches to absolute CSS mm units. At 100% scale in your print dialog, output matches your spec exactly.
Toggle a precise millimetre grid over your artwork to spot alignment issues and measure margins at a glance.
Your px/mm ratio is persisted in localStorage — calibrate once per device, use the tool forever without repeating the step.
Anyone who designs things that get physically printed — and wants to be confident before pressing "send to print."
Check that ingredients text is legible and logo proportions look right on the actual label size — before ordering thousands of units.
Standard credit-card size is 85.6 × 54 mm. Preview your design at that exact size and catch crowding or font issues instantly.
From DIN A6 postcards to A3 posters — set the dimensions, load your file, and see it life-size on screen.
Verify that fold lines, cutouts, and text panels all have the correct real-world proportions before sending files to the printer.
Small formats are notoriously tricky on screen. Proof at 1:1 and make font-size decisions with confidence.
Have a deadline and no time for a test print? Use the tool as a rapid sanity check to catch obvious errors in seconds.
Your files never leave your device. Everything runs entirely in the browser — no server, no upload, no account. Images are read as local data URLs and discarded when you close the tab.
Open the tool, calibrate your screen in under a minute, and never waste a test print again.