Deskew PDF Free Online - Straighten Tilted Scans

Automatically detect and correct skewed pages in scanned PDFs. Uses advanced image processing to straighten tilted documents.

Click to select files or drag and drop

One or more PDF files

Your files never leave your device.

How It Works

1

Upload PDF

Select your scanned PDF with tilted pages

2

Auto-Detect

OpenCV analyzes and detects skew angles automatically

3

Download

Get your straightened PDF instantly

Why Choose SwiftPDFLab for PDF Deskewing?

100% Private

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

Advanced Detection

Uses OpenCV's advanced image processing algorithms to detect skew angles with high precision.

Configurable

Adjust sensitivity threshold and processing quality to match your needs.

Batch Processing

Process multiple PDF files at once. No limits on file count.

Frequently Asked Questions

What is PDF deskewing?

PDF deskewing is the process of correcting tilted or skewed pages in scanned documents. It straightens the content to make it easier to read and process.

How accurate is the skew detection?

Our tool uses OpenCV's advanced algorithms that can detect skew angles with sub-degree precision. You can adjust the sensitivity threshold based on your needs.

Are my files private?

Yes! All processing happens entirely in your browser using WebAssembly. Your files never leave your device and are not uploaded anywhere.

What's the difference between DPI settings?

Higher DPI means better accuracy but slower processing. 150 DPI is recommended for most documents. Use 300 DPI for documents requiring maximum precision.

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