Straighten a scanned PDF
Pages fed into a scanner at an angle come out crooked. Quikdo measures the tilt of every page and turns it straight, without re-compressing the scan.
Nothing is uploaded. Your files stay private.
How to straighten a crooked scan
Three steps, about ten seconds.
- 01
Add your scan
Drop the PDF in the box, or tap to choose it.
- 02
Check the angles
Each page is measured and the preview shows it straightened. Nudge any page by half a degree if needed.
- 03
Download
Press Straighten PDF to save the fixed copy.
Good to know
Deskew finds the lines of text on each page and works out how far they slope, up to 10 degrees either way. Pages that are already straight are left alone.
The page itself is rotated as it is, without being redrawn, so the scan keeps its full quality and file size. Straight pages also give much better results with OCR PDF.
For pages that are sideways or upside down, use Organise pages to rotate them in 90 degree steps first.
Frequently asked questions
How do I straighten a scanned PDF?
Drop the PDF in. The slope of the text on each page is measured and the page is turned straight, up to 10 degrees either way.
Does it work on photos of documents?
It straightens tilt, not perspective. For phone photos, use Scan to PDF, which also flattens the page.
Will it lose quality?
No. The page is turned, not re-compressed.
Why wasn't a page changed?
It was already straight, or it has too little text to measure. Use the arrows on that page to set the angle yourself.
Is my PDF uploaded?
No. Pages are measured and straightened in your browser, so the scan stays on your device.