Will my PDF stay searchable?

No. Deskew rasterizes each page, so text is no longer selectable unless you run OCR elsewhere.

When does auto-detect work best?

Scanned documents and pages with clear horizontal text lines. Pure graphics or heavy layouts may get little or no correction.

No. PDF.js and pdf-lib run locally in your browser.

Yes. Unlimited use with no signup.

Deskew PDF Online Free

Automatically straighten tilted scanned pages using OpenCV. All processing happens in your browser. No uploads, no signup—your files never leave your device.

Drop your PDFs here, or click to choose files

Your files never leave your device. All processing happens in your browser.

How to use

Upload PDF

Add a scanned or crooked PDF. Processing runs entirely in your browser.

Deskew

Use auto-detect for typical scans, or turn it off and enter a manual rotation in degrees for every page.

Download

Download the straightened PDF. Pages are rebuilt as images so file size may change.

Frequently asked questions

OCR PDF
Make a PDF searchable and copyable.
Repair PDF
Recover data from corrupted or damaged PDF files.
Compress PDF
Reduce PDF size with Condense or Photon, multiple levels, grayscale, and custom settings. One or more files.