Document Scanning
Turning phone photos of paper into clean, usable PDFs
A phone photo of a document is almost never usable as-is: the page is skewed, the lighting is uneven, and the edges of the table or desk are in the frame. A document scanner app fixes all three in one pass — it finds the document's actual corners inside the photo, warps the image back to a flat rectangle (perspective correction), and cleans up the exposure and contrast so text reads like it was scanned on a real flatbed. The output is usually a PDF, since that's the format most people actually need for record-keeping, signing, or emailing.
The quality bar for this category has moved: Apple's Vision framework now does edge detection and perspective correction on-device, which means a scanning app doesn't need to upload your receipts and contracts to a server to do this work well. We built Scannic around that — point your camera at a document, and it scans, corrects, and exports to PDF entirely on your Mac, with nothing leaving the device.
The app
How it compares to other tools
Frequently asked questions
What makes a document scan actually usable, versus just a photo?
Three things: perspective correction (the page reads as a flat rectangle, not a trapezoid), consistent lighting/contrast (so text is legible and the file isn't huge), and a sensible export format — PDF for anything you'll file, sign, or send, rather than a raw image.
Do I need OCR to make a scanned document searchable?
Only if you want to search or copy text from the scan later. For simple archiving — a receipt for taxes, a signed lease — a clean image-based PDF is enough. OCR adds a searchable text layer on top, which matters more for scanning multi-page documents you'll need to reference again.
Is it safe to scan sensitive documents (contracts, IDs, medical paperwork) with a phone or Mac app?
That depends entirely on whether the app processes the image on-device or uploads it to a server. Cloud-based scanners often keep a copy of what you scan on their infrastructure, sometimes indefinitely. An on-device scanner (edge detection and PDF export happening locally, nothing transmitted) avoids that exposure by design.
Batch scanning vs. one page at a time — does it matter?
For a single receipt, no. For anything with multiple pages (a contract, a multi-page whiteboard session, a stack of receipts), batch processing into one combined PDF saves real time over scanning and exporting each page separately.