Rotate and Straighten a Signature
Fix a signature that went through the scanner at an angle. Rotate by any amount until it sits level on the line.
Free preview · No signup · ~10 seconds
Drop a crooked scan — image or 1-page PDF
PNG, JPG, WebP, SVG or a 1-page PDF — up to 20 MB
Runs entirely in your browser. Your image is never uploaded.
Why scanned signatures come out crooked
Any angle, not just quarter turns
A page fed slightly askew is out by two or three degrees, not ninety. The slider covers the full range one degree at a time, so you can correct the small tilt that is actually the problem.
The canvas grows to fit
Rotating a rectangle needs a bigger rectangle to hold it, so the canvas expands and the new corners are transparent. Nothing is cropped off, which matters when the signature already runs close to the edge.
Rotation costs a little sharpness
Any angle that is not a multiple of ninety degrees has to resample the pixels, which softens edges very slightly. It is invisible at one pass and starts to show if you rotate repeatedly, so get it right in one go rather than nudging back and forth.
Transparency survives
A transparent signature stays transparent, and the fresh area created around the rotation is transparent too, so the file still drops cleanly onto a document.
Straighten first, then crop
Correct the angle before cropping. Cropping first means the rotation adds transparent wedges inside the frame you just chose, and you have to crop a second time.
How to rotate and straighten a signature
Upload the signature
Drop in the crooked scan or photo. Scanned to PDF instead? A single-page PDF works as well — page 1 is turned into an image in your browser.
Dial in the angle
Drag the slider until the signature sits level. Small corrections of one to five degrees fix most scanner tilt.
Download
Take a free preview, or download the full-resolution file with one credit.
When straightening matters
Crooked scans
Correct a page that went through the feeder at a slight angle.
Phone photos
Level a signature shot freehand where the paper was never quite square.
Placing on a signature line
Match the angle of the printed line the signature has to sit on.
Batch consistency
Make several signatures share the same orientation across a set of documents.
Or just ask
Describe the edit in your own words
Type what you want changed and the assistant does it on the canvas — each step lands as a layer you can reopen, so nothing it does is baked in.
No edits yet.
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Straighten your signature
Upload the crooked scan, dial in the angle, and download it level.