Straighten PDF Online - Professional Deskew Tool

Fix tilted scans and straighten crooked PDF pages automatically using advanced image processing. 100% private and secure.

Click to select a file or drag and drop

One or more PDF files

Your files never leave your device.

How to Straighten PDF Online

1

Select Scanned PDF

Upload the PDF document containing tilted or crooked scanned pages.

2

Auto-Correction

Our AI-powered engine analyzes each page to detect and correct the precise skew angle.

3

Download Results

Save your perfectly straightened PDF document instantly to your device.

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Frequently Asked Questions

What is PDF deskewing?

Deskewing is the process of correcting tilted or rotated pages in scanned documents. When you scan a document, it's common for pages to be slightly skewed. This tool automatically detects and corrects that skew.

Why use ZentoPDF to straighten scans?

Our tool uses advanced OpenCV image processing to straighten your documents with professional precision. Best of all, your files never leave your computer, ensuring complete privacy for sensitive documents.

How accurate is the skew detection?

The tool analyzes the layout and alignment of text and lines on the page to determine the exact angle of rotation needed to perfectly square the document.

Will straightening my PDF affect the text quality?

No. The deskew process rotates the page content but maintains the original resolution you specify (up to 300 DPI) to ensure clear, readable output.