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PDF tool · runs in your browser

Straighten tilted PDF scans

Automatically correct small scan angles, or apply your own rotation, and save a new PDF.

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Supported languages

processes page images regardless of language, without recognizing or translating text. Automatic correction works best on pages with horizontal text lines. Vertical text, graphics or sparse pages may need a manual angle.

How to use deskew scanned pdf

  1. 1. Open tilted scans

    Choose a scanned PDF with up to 100 pages. Automatic deskew is intended for small tilts in horizontal text.

  2. 2. Choose automatic or manual

    Use Automatic for angles up to 5 degrees, or Manual for an angle from -10 to +10 degrees. Positive values rotate clockwise.

  3. 3. Inspect straightened pages

    Select Process PDF and review the reported angles. Download the image-only PDF; run OCR afterward if searchable text is needed.

What this tool preserves

Automatic correction searches up to 5 degrees. Output is image-only; page edges expand and original interactive features are lost.

Privacy and practical limits

Files stay on your device. Each input must be under 150 MB. Processing speed and memory use depend on your device. Keep original documents; PDF transformations do not preserve digital-signature validity.

Built by Faheem Riaz at Feemag. How file privacy works · Report a problem

Good to know

Questions & answers

What angles can automatic deskew correct?

Automatic correction searches from -5 to +5 degrees. For a different small tilt, use a manual angle between -10 and +10 degrees. Use Rotate PDF for sideways pages.

Does deskew preserve selectable text?

No. This tool exports new image-only pages at up to 144 DPI. Text selection, links, form fields and signature validity are not preserved. Run OCR afterward if you need searchable text.

Why might automatic deskew leave a page unchanged?

Blank pages, sparse text, graphics or unclear line direction may not provide a reliable angle. Inspect the output and use the manual angle when needed.

Which languages are supported?

Language support: processes page images regardless of language, without recognizing or translating text. Automatic correction works best on pages with horizontal text lines. Vertical text, graphics or sparse pages may need a manual angle.

Is it really free?

Yes. Every Feemag tool is free, with no sign-up, no watermarks added by us and no daily limits.

Are my files uploaded anywhere?

No. Your files are processed by your own browser on your device and never uploaded to a server. Processing speed depends on your device and file size.

Does it work on my phone?

Yes: in any modern browser (Chrome, Safari, Edge or Firefox) on iPhone, Android, Mac, Windows and Linux.

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