Straighten a crooked scanned document
Fix a skewed, tilted, or trapezoid-shaped scan in seconds — drag four corners and get a perfectly flat page, free and private.
Upload Document Images
Drag & drop files here, click to browse, or use your camera. Supports multiple files — JPG, PNG, WEBP, HEIC.
100%
Processed in-browser
4
Adjustable corner points
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Average cleanup time
0
Files ever uploaded
How to fix a crooked or skewed scan
One drag-and-crop step is usually all it takes.
Upload the crooked scan
Add the PDF or photo of the document that's tilted, skewed, or shot at an angle.
Drag the corners onto the page edges
Move the four corner handles to trace the actual edges of the page. The tool perspective-crops it into a flat rectangle, correcting skew as well as simple rotation.
Download the straightened PDF
Save the corrected page, or clean up the background and pick a color mode before exporting.
Fixes more than just rotation
Built to correct real-world skewed scans, not just spin a flat image.
Perspective correction, not just rotation
A crooked phone photo is usually skewed at an angle, not simply rotated. Corner-point cropping maps the page onto a flat rectangle, correcting true perspective distortion.
One-tap 90° rotate and flip
For scans that came out sideways or upside down, rotate or flip instantly in addition to corner correction.
Works on phone photos and real scans alike
Whether the crookedness came from a rushed phone photo or a slightly misaligned flatbed scan, corner cropping straightens both.
Background and shadow cleanup
Once the page is straight, strip out the desk or shadow around it for a cleaner finished document.
Consistent results across multiple pages
Straighten several pages of the same document and combine them into one properly aligned multi-page PDF.
No upload required
Straightening happens locally in your browser with WebAssembly — the crooked original never leaves your device.
Rotation alone won't fix a skewed page
Spinning a photo only helps if it's tilted evenly. Most crooked scans are also skewed — closer on one side than the other — which needs perspective correction, not just rotation.
A straight scan looks intentional
A tilted, trapezoid-shaped page reads as careless, even if the content is fine. Straightening it makes the same document look properly scanned.
Takes seconds, not software
There's no need for scanning hardware or desktop software with an auto-align feature — dragging four points in the browser does the same job.
When a scan needs straightening
Anywhere a page came out tilted, skewed, or at an angle.
Quick phone photos
Straighten a document photographed in a hurry, at an angle, without a flat surface to shoot from directly above.
Misfed flatbed scans
Fix a page that shifted slightly on the scanner bed and came out a few degrees off.
Contracts and signed documents
Straighten a signed page before filing or sending it, so it reads as a clean, professional scan.
Book and magazine pages
Correct the curved, skewed look that comes from photographing a page in a bound book.
Receipts photographed on the go
Fix the tilt in a receipt photo taken quickly, before filing it for expenses or bookkeeping.
Whiteboards and posters
Straighten a photo taken from an angle across a room, like a whiteboard or a printed notice.
More scanning tools
Free, private, and browser-based — just like the tool above.
Loved by renters, bookkeepers & coordinators
Thousands of people clean up a scanned document here every day. Here's what a few of them say.
“My phone scan of a lease was crooked with a shadow across it. Two minutes here and it looked like it came off a real scanner.”
“Switching to black & white made an old faded receipt scan actually readable again — and it never left my laptop.”
“I clean the scan, then compress it to 200KB for the portal. Two tools, zero uploads, done in under a minute.”
Frequently asked questions
How is this different from just rotating a photo?
Rotation only spins the whole image. Dragging the four corners onto the page edges perspective-crops it into a flat rectangle, which corrects true skew — where one side of the page is closer to the camera than the other — not just a simple tilt.
Will straightening crop out part of my document?
Only the area outside the four corner points you set is cropped away. Position the handles right on the page's edges and the full content of the page stays in the result.
Can I straighten a PDF, not just a photo?
Yes. Upload a PDF page the same way you would a photo — the corner-cropping tool works on both.
Is my document uploaded anywhere to straighten it?
No. Perspective correction runs entirely in your browser using WebAssembly. The file never leaves your device at any point.
Can I straighten multiple pages at once?
Straighten each page individually with its own corner points, then combine them into a single multi-page PDF once every page is flat.
Is this straightening tool free to use?
Yes, completely free — no signup, no watermark, and no limit on how many documents you straighten.