Straighten document photos

Align four corners to correct a document photo’s perspective. Review detected corners and adjust them by dragging, arrow keys or coordinates.

Files are processed on your device and are not uploaded to a server. Tool assets load from this site. Use is free, with no sign-in required.

SMILEON / DOCSCAN

Align four corners to correct a document photo’s perspective. Review detected corners and adjust them by dragging, arrow keys or coordinates.

JPG, PNG or WEBP up to 20 MB, 20 MP and a 12,000-pixel long edge. Each dimension must be at least 16 pixels.
Saves a PNG or JPEG copy. Large results are reduced to at most 12 MP and a 6,000-pixel long edge.
Corrects perspective using four corners. It does not flatten curved book pages or restore crumpled paper.

Files are processed on your device and are not uploaded to a server. Tool assets load from this site. Use is free, with no sign-in required.

What if automatic corner detection fails?

The photo remains available for manual alignment. Move each corner by dragging, arrow keys or entering coordinates.

Can it flatten a curved book page?

No. This is four-corner perspective correction, not page-curvature or paper-crease restoration.

Do I need to upload my file?

No. Your selected file is processed in your browser. No account is required, and the original file stays unchanged.