Free, right here
The seam score, per-edge readouts, and the tiled repeat preview all run in your browser. Your image never leaves your browser — nothing is uploaded, no account, no credits.
Free tool
Seamless pattern checker
Drop a tile and find out — objectively — whether it repeats without a visible seam. A 0–100 score, per-edge readouts, and a tiled preview with seam guides, computed on your device.
Drop an image here, or
PNG, JPEG, WebP, or AVIF · up to 16 MB.
We score how invisibly it tiles — nothing to configure.
Runs entirely in your browser — nothing is uploaded, no credits used.
01How it works
A seam is a kink, not a slope
The checker measures the second difference — curvature — across both wrap edges, so a busy print isn't punished for being busy. It's the exact metric the TextileDesign editor and backend use, locked to one shared test fixture.
In the app, with credits
Repairing a bad seam is generation work: Make seamless rebuilds the join with AI inpainting, re-scores the result with this same metric, and saves it to your project.
Seam scored red? TextileDesign can repair it.
Create an account and run Make seamless — the app rebuilds the join, re-scores it with this same metric, and hands back a tile that actually repeats.
Create your account