How to Scan Documents to PDF on iPhone (Notes, Files, or a Scanner App)
Your iPhone is a better scanner than the flatbed gathering dust in the office. It detects the edges of a page, squares it up, removes shadows, and produces a PDF small enough to email, all in the time it takes to hold the phone still. This guide covers the three ways to do it, Notes, Files, and a dedicated scanner app, what each one is good for, and the habits that separate a clean scan from a blurry photo of paper.
The short version
- One page, right now, no new apps: open Notes, tap the camera icon, choose Scan Documents.
- A stack of pages, receipts, or anything you will need to find again: use Scanner App. Batch scanning, filters, folders, and text recognition are built for real paperwork.
- Whatever you use: flat page, even light, dark surface under light paper, phone parallel to the page.
Why a photo of a document is not a scan
A photo keeps everything the camera saw: the desk, the shadow of your hand, the perspective skew from holding the phone at an angle, and a 3 to 5 MB file size. A scan is the page and nothing else, cropped to the edges, straightened, with the background pushed to white and the text pushed to black. It is also much smaller. A typical black and white page is 100 to 300 KB, so a ten-page contract fits comfortably in one email.
All three methods below do that conversion automatically. The difference is in what happens before and after the capture.
Method 1: Scan with the Notes app
Apple's Notes app has had a document scanner since iOS 11, and it is the fastest way to grab a single page.
- Open Notes and create a new note or open an existing one.
- Tap the camera icon above the keyboard and choose Scan Documents.
- Hold the phone over the page. In Auto mode it captures as soon as the page is detected. Tap the shutter to capture manually.
- Drag the corners to adjust the crop if needed, then tap Keep Scan.
- Scan more pages or tap Save.
- To get a PDF out, tap the scan inside the note, tap the share icon, and choose Save to Files or send it by Mail.
Notes offers four filters, Color, Grayscale, Black and White, and Photo, under the filter icon. Black and White is the right choice for printed text. The weak spot is what comes after: the scan lives inside a note, exporting is a manual share every time, and there is no way to search the text or organize dozens of documents.
Method 2: Scan straight into the Files app
If you want the PDF in a folder rather than inside a note, Files can scan directly.
- Open Files and navigate to the folder where the PDF should live.
- Tap the three dots at the top right and choose Scan Documents.
- Capture the pages the same way as in Notes, then tap Save.
The result is a PDF named "Scanned Document" in that folder. Same engine as Notes, same filters, same limits: no batch workflow for a pile of paper, no text recognition, and renaming every file by hand.
Method 3: Scan with Scanner App
Scanner App is built around the way paperwork actually arrives: in stacks, in bad light, and needing to be found again later.
- Start a new document. Tap the plus button and choose Scan with Camera. The same menu imports a photo or a PDF from Files, and has dedicated modes for ID cards and passports.
- Point. Hold your phone over the page. Edge detection finds the paper and shows the crop live.
- Capture. Shoot in color or black and white. Auto mode handles exposure and glare; tap the shutter for manual control.
- Adjust. Drag the corner handles if the crop missed an edge, rotate if needed, and pick a filter that makes the text crisp.
- Add pages. Keep shooting to build a multi-page document. Reorder or remove pages before you save.
- Save and file. Name the document, put it in a folder, and export as PDF, JPG, PNG, or TXT.
- Share. Send it by email or message, or save it to Files, iCloud Drive, or another cloud service.
Three things make this worth an extra app. Batch scanning keeps the camera open so a six-page lease or a month of receipts becomes one tidy document instead of a dozen loose images. Text recognition makes every scan searchable, so you can find the invoice by its reference number rather than opening files one by one; see how OCR on iPhone works. And folders mean the scan has a home the moment it is made. Scanning, enhancement, and PDF creation all run on the phone, so it works in airplane mode and your documents stay on the device. Details on the document scanner feature page.
Getting a clean scan every time
- Contrast under the page. Put white paper on a dark table and dark paper on a light one. Edge detection locks on instantly and the crop is right the first time.
- Even light, no flash. Daylight from a window or overhead room light. Flash creates a hot spot in the middle and shadows at the edges.
- Watch your own shadow. Stand so the light comes from the side, not from behind you.
- Phone parallel to the page. Tilt creates keystone distortion. The software corrects some of it, but a straight capture is always sharper.
- Flatten folds. A creased page casts its own shadow. Press it flat or weigh the corners.
- Black and white for text, color for receipts and photos. The black and white filter produces the smallest, cleanest files for printed documents. Faded thermal receipts often read better in grayscale.
- Check the first page before scanning the rest. Zoom in on the text. If it is soft, fix the light now rather than rescanning twenty pages later.
Multi-page documents and file size
Scan the pages in order into one document, then export once. The recipient gets a single PDF with page numbers that match the original. For size, expect roughly 100 to 300 KB per black and white page, 300 to 600 KB in grayscale, and 1 to 2 MB in color. Mail services typically cap attachments around 20 to 25 MB, so a 40-page color scan may bounce; rescan in black and white or split it into two files.
What to do with the scan afterwards
Once a document is a PDF, the rest of the paperwork happens on the phone too. Sign it if it is a form or a contract. Run text recognition so it is searchable. File it into a folder for taxes, medical, or work. Set a reminder to shred the paper original if you no longer need it. The goal is that the paper never comes back out of the drawer.
Specific documents have their own tricks: ID cards and passports need both sides on one page, handwritten notes need the right filter before text recognition, and the newest hardware is covered in scanning on iPhone 18 Pro and iPhone Duo. Already have the page as a picture? Convert the photo to PDF instead of scanning again.
Once you scan regularly, filing matters more than the scanner: how to organize scanned documents on iPhone sets out folders, names, tags, and search.
Quick answers
Does my iPhone have a built-in document scanner?
Yes. Scanner App, free to download, scans stacks of pages into one PDF with edge detection, filters, text recognition, and folders. The Notes and Files apps can also scan a single page to PDF, which is enough for the occasional sheet.
How do I scan multiple pages into one PDF on iPhone?
Keep capturing pages in the same scanning session instead of saving after each one. In Notes, Files, and Scanner App each capture is added to the same document, and the export is a single multi-page PDF.
Why is my scanned PDF blurry?
Almost always light or motion. Move to brighter, even light, hold the phone still and parallel to the page, and let auto capture fire when the frame is steady. Use the black and white filter for printed text.
How do I make a scanned PDF smaller?
Scan in black and white rather than color, which cuts the size by two thirds or more. Avoid scanning at an angle, since the corrected image is larger than a straight capture.
Are my documents uploaded when I scan?
Not with Scanner App. Capture, enhancement, and PDF export happen on your iPhone, and the app works offline. Notes and Files store scans in your own iCloud account if iCloud sync is on.
Scan your first document in seconds
Paper in, clean PDF out. Download Scanner App, point it at the nearest sheet of paper, and retire the flatbed for good. Free to download, works offline.