Guide
When a phone scan is good enough
People open a document scanner because a clerk, a teacher, or an inbox asked for a PDF. The phone is already in your pocket. The question is whether that photo-as-PDF will be accepted, not whether it looks impressive. This guide is the decision list we use when someone writes to ask if RealScaner can replace a shop scanner.
Jobs the phone handles well
Everyday paperwork that someone will read on a screen, file in email, or attach to a form is a good match. Receipts for expense reports, permission slips, homework, invoices under a few pages, meeting notes, and a signed letter you already have on paper all work if the text is readable at 100% zoom. The RealScaner scanner is built for that path: capture, crop, clean the paper color, export PDF.
A phone also wins when the original is not a neat A4 sheet. A crumpled till receipt, a shipping label, a whiteboard after a meeting, a page from a spiral notebook: a camera can follow those shapes. A flatbed often cannot without damaging the binding.
Jobs that still need another process
- Certified copies of passports, visas, or court papers. The office that asked usually wants their own stamp, not a phone photo.
- Notarized originals. A scan of a notarized page is a picture of the stamp. It is not a new notarization.
- Bound books, glossy photo albums, and pages that must stay unbent. Use a book-edge scanner or a shop.
- Archival records you will reprint at high resolution years later. Keep the original paper or a lossless scan.
- Anything whose instructions say “do not photocopy” or “in-person only.” Follow those instructions.
How to tell from the file, not from the device
Open the PDF and read the smallest required line: a tax ID, a barcode, a handwritten date. If you have to guess a digit, recapture closer. Check corners for cut-off stamps. Check the back of thin forms; bleed-through looks like extra text. If the portal lists a maximum file size, compress after you have a readable scan, using Compress PDF, rather than standing farther away.
Color matters when the form uses colored stamps or highlighter. Black-and-white cleanup can erase a red “received” mark. Keep a color export for those pages and a high-contrast export for dense text pages, then combine them in Organize PDF.
What RealScaner gives you
The scanner gives you a clean copy, made on your device and never stored on a server. If a portal later asks “who scanned this,” the answer is simple: you did, on your device, with a browser tool. That is enough for most school and office uploads. When the law requires a particular office to make the copy, or a notary to sign it, that office’s process applies.
For lighting and framing details, use how to scan a document on your phone. For portal size and naming rules, use prepare a PDF for an upload portal.
Updated September 26, 2026. First published September 26, 2026.
Keep reading
- How to scan a document on your phone
Lighting, framing, and export settings that turn a phone photo into a readable scan.
- Compress a PDF without ruining the text
When shrinking images inside a PDF helps, and when a smaller file starts to look worse.
- Prepare a PDF for an upload portal
Size limits, page order, file names, and a last check before a government or school form rejects the file.
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