Deskew PDFStraighten skewed or tilted scanned pages
Straighten skewed or tilted PDF pages automatically. The tool detects the tilt angle of each page and rotates it to correct the skew. Ideal for fixing crooked scans, photos of documents, and tilted pages. Runs entirely in your browser.
Straighten Skewed PDF Pages
Upload a scanned PDF with tilted pages. The tool analyzes each page using projection profile analysis, detects the exact skew angle, and rotates to straighten it. Works on text-heavy documents, scanned forms, receipts, and photographed pages. The result is clean, properly aligned pages.
Fix Crooked Scans Automatically
When a document is placed slightly crooked on the scanner, every page comes out tilted. Rather than re-scanning the entire batch, upload the PDF here and fix the skew in seconds. The detection works per-page, so pages with different tilt angles are each corrected individually.
Deskew Before Running OCR
Skewed text confuses OCR engines and produces poor text recognition results. Straighten your scanned PDF first, then run OCR PDF for much better accuracy. This is the recommended workflow for converting scanned documents to searchable text.
Important: Output Pages Become Images
The deskewing process re-renders each page as a high-resolution image. Text in the output will not be selectable or searchable. If you need searchable text, run OCR PDF on the deskewed result to add a text layer back.
How to Deskew a PDF Online
Upload Your Skewed PDF
Drag and drop a scanned PDF with crooked or tilted pages.
Automatic Straightening
The tool detects the skew angle of each page and corrects it automatically.
Download the Straightened PDF
Download your PDF with properly aligned pages.
Frequently Asked Questions
What does deskew mean?
Deskewing detects the tilt angle of a scanned page and rotates it so text lines are perfectly horizontal. It fixes the crookedness from placing a document slightly off-angle on the scanner.
Will deskewing make the text blurry?
The rotation may introduce minimal interpolation, but visual quality remains high. The improvement in readability from straightening far outweighs any minor softening.
Does the output have selectable text?
No. Deskewed pages are re-rendered as images. Run OCR PDF afterward if you need searchable text.
Should I deskew before or after OCR?
Before. Straightened text produces significantly better OCR results. Deskew first, then run OCR PDF.
Can I deskew only specific pages?
The tool processes all pages. Pages that are already straight will have near-zero correction applied.
Is my file uploaded to a server?
No. Everything runs in your browser. Your scanned documents never leave your device.