Deskew Scanned PDF
Automatically detect and straighten crooked scanned pages, with an optional manual angle adjustment.
Deskew Scanned PDF online, free and private
Crooked scan lines are distracting and can reduce OCR quality. Automatic deskew scores horizontal text alignment page by page, while manual mode applies one precise angle to the whole document.
The complete workflow runs locally in your browser. Your source file is not sent to PDFToolz or stored on a server.
How to deskew scanned pdf in your browser
- 1
Add your source
Choose a local file or use the direct-input controls shown in the workspace.
- 2
Review the options
Choose automatic detection or enter a manual angle, then set the image-quality balance for the rebuilt scan.
- 3
Straighten the pages
Run the tool, review the completion summary, then save the generated file or report to your device.
Why use PDFToolz for this
On-device processing
PDF parsing, rendering and export happen in browser memory, without an upload step.
Clear scope
Deskewing rasterizes pages. Use it for scan-based PDFs, and run OCR afterwards if searchable text is required.
No account required
Use the tool without signup, a trial, a watermark or a server-side file quota.
Built for real documents
Progress feedback, device-memory limits and output descriptions make the result predictable before download.