Deskew PDF

Straighten tilted scanned PDF pages locally with best-effort text-line angle detection, optional border crop, and before-and-after preview.

Options

Best-effort local text-line angle detection for small tilt correction.

Optional crop trims white borders introduced by rotation when page edges are clear.

Color, grayscale, or black-and-white output with mild contrast and quality controls.

Output is rebuilt as page images; run OCR PDF afterward when you need searchable text.

How to deskew a PDF

  1. Upload PDF — Upload a tilted scanned or camera-created PDF.
  2. Choose output — Choose whether to preserve color, use grayscale, or output black-and-white pages.
  3. Adjust settings — Adjust DPI, quality, mild contrast, and border crop.
  4. Deskew — Deskew locally, compare the preview, and download the straightened copy.

FAQ

Are PDFs uploaded?
No. Rendering, angle detection, preview, and export run in your browser.
Will every page rotate?
No. Pages are deskewed only when the local detector finds a confident small-angle text-line signal.
Can it fix sideways pages?
Use Auto-Rotate Scanned PDF for 90-degree orientation fixes. Deskew PDF focuses on small tilt correction.