Documents tower · floor

How to scan a document on iPhone, and on Android

How to scan a document on iphone is asked by people who have already tried the obvious thing — photographing the page — and been sent back to do it again. Both phones have a real document scanner built in, neither is in an app called Scanner, and neither costs anything.

iPhone and iPad

The Notes app

  1. Open Notes and start or open a note.
  2. Tap the camera button, then Scan Documents.
  3. Hold the page in frame. Apple documents an automatic capture: keep the phone steady and it takes the shot itself when it detects the edges of the page.
  4. Adjust the corners if it got them wrong, scan further pages, then finish.

Apple’s documentation is explicit about the result: the document is saved as a PDF in the note. Not a photograph — a PDF.

Android

The Google Drive app

  1. “Open the Google Drive app”.
  2. “At the bottom right, tap Camera”, then “Point your device’s camera at a document”.
  3. Adjust it: Google lists “Crop & Rotate”, “Filter” and “Clean”, plus Add for another page and Retake.
  4. “Tap Done”, name the file, then save.

And the step nobody expects to be a choice: “To save the scanned document in a specific format, select either .pdf or .jpg.”

Nothing needs installing on either. On an iPhone the scanner lives inside Notes, which is why people who look for a scanning app never find it. On Android it lives inside Google Drive, for the same reason.

Why this beats photographing the page

A photograph of a document
  • Taken at an angle, so the page is a trapezium
  • Your shadow across one corner
  • The table, your sleeve, the floor
  • Several megabytes, in colour, per page
  • One file per page, in no particular order
A scan from the same phone
  • Corners detected and the page squared up
  • Filters that flatten shadow and paper colour
  • Cropped to the document and nothing else
  • Far smaller, which matters at the upload box
  • All pages in one PDF, in order

Same camera, same lighting, same thirty seconds. The difference is entirely in what the software does with the frame — and it is the difference between a document somebody accepts and one they ask you to send again. Almost every rejected upload described as “the photo was too big” or “they said it was unreadable” started life as a photograph rather than a scan.

That last point is the whole floor, really. The searches around this one — scan documents, how to scan with my phone, how do i scan with my phone, how to scan a document with phone — are almost all from somebody holding a phone and a piece of paper, believing they need something they do not have. They already have it.

One practical note before the floors below, because it is where scans go wrong most often. Put the page on something plain and dark rather than a patterned tablecloth, and stand so the light is behind you rather than behind the page. Edge detection works by finding the boundary of the paper; a busy background and a shadow across the corner are the two things that defeat it. When the automatic capture refuses to fire, that is almost always why — and moving one step to the side fixes more attempts than any setting.

Where to start

Four ways in.

“I have an iPhone.”
It is above. Then after the scan
“I have an Android phone.”
Also above. Then after the scan
“It came out crooked or unreadable.”
Go to getting a clean scan
“It has to be signed.”
That is signing and sending

Getting a clean scan

The difference between a scan somebody accepts and one they send back is almost never the phone. It is the surface, the light and the angle.

Light, background and shadowWhy edge detection fails, and the one step sideways that usually fixes it.Being built
Multi-page documentsSeveral pages into one PDF, in order, without starting again.Being built
Filters and readabilityGreyscale, black and white, colour — and which one an official document wants.Being built
Scanning a passport or IDThe documents where legibility is the whole point, and cropping matters most.Being built

After the scan

What you have now is a PDF on a phone. Getting it where it needs to go, at the size it needs to be, is the rest of the job.

Getting it off the phoneEmail, cable or cloud, and which keeps the file intact.Being built
When the upload box refuses itGetting under a size limit without making an official document unreadable.Open this floor → Making the text searchableA scan is a picture of words until something reads it.Open this floor → Combining with other filesPutting the scan together with documents you already had.Open this floor →

Signing and sending

The commonest reason a document is scanned at all: somebody needs it back, signed, today.

Signing on the phoneA signature made once and reused, without printing anything.Open this floor →
Filling in a form firstReal form fields, and what to do when a PDF refuses typing.Being built
Print, sign, scan — and why not toThe old loop, what it costs in legibility, and what replaces it.Being built

Scanning without a phone

For volume, for a stack of pages, or for the archive nobody wants to redo. A phone is excellent for one document and poor for two hundred.

A flatbed or a printer that scansWhat resolution to choose, and why higher is not better.Being built
Scanning a book or a bound filePages that will not lie flat, and the trade that comes with them.Being built
Old photographsA different job with different settings, and one chance to get it right.Being built

What this tower will not do

It will not recommend a scanning app for a job the phone already does. Both systems ship one, and both save straight to PDF.

It will not tell you a scan is as good as an original. Where a document has to be legible to a person who can reject it, the floor says what to check before sending.

And it will not rank the scanning apps yet. That verdict needs the same awkward documents — a creased receipt, a bound page, a passport, a form in faint blue ink — through each of them, with the results shown at the size they will actually be read. What holds instead is simple: the steps on this page are taken from Apple’s and Google’s own documentation.

Where this page got its facts

  1. Apple Support — Scan text and documents in Notes using the iPhone camera, including automatic capture and the note that the document is saved as a PDF — support.apple.com, read 21 August 2026.
  2. Google Drive Help — Scan documents with the Google Drive app, including the crop, filter and clean options and the choice between .pdf and .jpg — support.google.com, read 21 August 2026.

Written by Alberto Gulotta

Founder and editor of AI Tools Primer, writing from Palermo, Italy. Thirty-five years of taking computers apart, starting with a Commodore 64 — the long version is on the about page.

Something wrong on this page? Write to aitoolsprimer@gmail.com and it gets fixed.

Written on 21 August 2026.

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