Straighten crooked scans (deskew)
Auto-straighten tilted scanned pages.
Your files never leave your device.
How to straighten crooked scans
Add the scanned PDF. Every page is measured for tilt.
Check the thumbnails, which show each page straightened, and adjust the smallest tilt to fix.
Press “Straighten pages” and download the corrected PDF.
Frequently asked questions
How does it find the tilt?
It looks at the lines of text on each page and finds the angle at which they line up best, to a tenth of a degree.
Does it work on photos of documents?
For photos taken at an angle, use the Camera scanner, which also corrects perspective. Deskew is for pages that are only rotated slightly.
What about pages without text?
Pages with too little text, such as photos or blank pages, are left as they are.
Do the corners get cut off?
Pages keep their size, so a very small strip at the corners may be trimmed. With typical tilts of 1° to 3° this is only the margin.
Are my files uploaded to a server?
No. This tool runs entirely in your browser, so your files stay on your device and are never sent anywhere. It even works with the internet switched off.