Seamless Tile Checker

See a 2×2 / 3×3 repeat, measure the left↔right and top↔bottom edges, and try a seamless fix.

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Seamless Tile Checker

See a 2×2 / 3×3 repeat, measure the left↔right and top↔bottom edges, and try a seamless fix.

How it works

Add images
Adjust settings and review the result
Download a new file

Supported formats

PNG / JPG / WebP / AVIF / HEIC → PNG + JSON (ZIP) — Input decoding depends on browser support and optional engines.

What this tool does

See a 2×2 / 3×3 repeat, measure the left↔right and top↔bottom edges, and try a seamless fix.

Implementation and verified quality

advanced · wrap-edge channel difference against an in-tile baseline / half offset + cross blend. Quality qualification is in progress. Pro/Flagship quality has not been established.

Before you export

The seamless fix alters the art (half-tile offset + cross-blend); it does not synthesise new content.

Frequently asked questions

What are this tool’s limitations?

The seamless fix alters the art (half-tile offset + cross-blend); it does not synthesise new content.

Are my files uploaded?

Nerulio processes selected files on your device and has no file-upload API. Optional engines and models are downloaded from third parties; those requests expose connection information such as your IP address.

Will my work be saved automatically?

No. Images and editing state stay in this tab; media output can use local temporary storage. Changing language preserves your work; reloading, closing the tab, or following a link to another page can clear it.