Deskew PDF

Straighten slightly tilted scanned pages.

Enable JavaScript in your browser to use this tool.

Deskew PDF help

Deskew PDF looks for a clear text tilt up to five degrees. Corrected pages become pictures with extra white edge space, so their corners are not cropped. Uncertain or already straight pages keep their original content.

How to use Deskew PDF
  1. Choose your scanned PDF.
  2. Choose the pages and picture resolution.
  3. Select Prepare PDF and review the reported page corrections.
  4. Compare original and corrected pages before downloading.
Options explained
Pages
Only selected pages are examined. A page changes only when a clear small tilt is found.
Resolution
Higher DPI keeps small scanned text sharper but uses more memory.
Limits and supported files

Standard PDFs without switchable layers or XFA. Selected fillable pages need Flatten PDF first.

128 MB input/output/converted-picture working set. Rendered input is bounded to 12 megapixels; expanded output to 16 megapixels and 8,192 pixels per side.

Up to 500 source pages; examine up to 100 per run with a two-minute deadline.

Current browsers with local workers. Included in the initial offline cache.

Every file is examined independently; no tilt or recognition accuracy is guaranteed.

Will it straighten every page?

No. Blank pages, dense photographs and uncertain text baselines may not provide enough evidence. Those original pages are kept.

Does it fix sideways pages?

Use Rotate PDF for quarter-turn rotation. Deskew handles clear small tilts up to five degrees.

Is text still selectable?

Corrected pages become pictures; they lose selectable text and interactive links/comments. Accessibility tags are removed from the new copy if any page changes. Unchanged pages keep their native content.

Can I use this to remove hidden data?

No. It changes page appearance, not document security. Digital signatures are invalidated when the copy is saved, with acknowledgement required.

Your files are processed on your device. Verify it yourself. Read our privacy policy for details about website analytics and saved settings.