Auto edge and perspective fix
Point your camera at a page and the app finds the corners, straightens the skew and crops to the document.
Tool
Document Scanner
Turn paper into clean scans with your camera — auto edge detection, perspective correction, export as image or PDF.
Why OneBox for scanning
Clean, readable output
Enhancement filters even out shadows and lighting, so faded print and crumpled paper come out legible.
Image or PDF
Save one page as an image, or keep adding pages and export the whole set as a single PDF.
How it works
- 1
Frame the document
Point the camera at the page. The app highlights the detected edges as you line it up.
- 2
Capture and enhance
Take the shot. Perspective is corrected automatically and the result is cleaned up for readability.
- 3
Save or share
Export as an image or as a PDF, then send it wherever you need — email, cloud storage or messaging.
AI agent
Or just say it
Tell the built-in agent what you want in plain English. It picks the right tool, runs it, and reports back — you never leave the chat.
›
Scan this contract and save it as a PDF›
Straighten this photo of a receipt and boost the contrast›
Scan these pages into one PDF ready for emailCommon questions
Does it need an internet connection?
No. Capture, edge detection, perspective correction and enhancement all run on your device.
Can I scan several pages into one file?
Yes. Keep adding pages and export the whole set as a single PDF in the order you scanned them.
How does it handle receipts and whiteboards?
Well. The enhancement step is designed to cope with shadows, creases and uneven lighting.
Where do my scans get saved?
To your gallery or the folder you choose. Nothing is uploaded anywhere.
Get OneBox free
90+ tools, free, no ads. All processing happens on your device. Open source under Apache-2.0.