iPhone's built-in camera app doubles as a capable document scanner, and iOS can turn those scans into a PDF without any third-party app. Whether you're scanning a contract, a receipt, or a multi-page form, the whole process takes under a minute.
How to Scan a Document to PDF Using the Notes App
The fastest built-in method uses the Notes app. Open Notes and create a new note. Tap the camera icon above the keyboard and select Scan Documents. Hold your iPhone over the document โ iOS automatically detects the edges and captures the scan. For multi-page documents, keep scanning each page. When done, tap Save. The scanned pages are inserted into the note as a PDF attachment.
To save it as a standalone PDF file, tap the scan in the note, then tap the Share button and select Save to Files. Choose a location in iCloud Drive or on your device and tap Save. The file is saved as a properly formatted PDF.
How to Scan a Document to PDF Using the Files App
On iOS 16 and later, the Files app has its own document scanner. Open Files, navigate to the folder where you want to save the scan, then tap the three-dot menu in the top-right corner and select Scan Documents. The scanner interface opens โ hold the phone over the document, let it auto-capture, and tap Save when all pages are done. The PDF saves directly to the folder you opened, with no extra steps.
This method is more direct than the Notes approach because the file ends up exactly where you want it from the start, ready to share or upload.
Getting the Best Scan Quality
A few habits consistently produce cleaner scans. Place the document on a flat, dark surface โ the contrast helps iOS detect the page edges accurately. Make sure the lighting is even; direct overhead light without shadows gives the sharpest result. Hold the phone parallel to the document rather than at an angle, and let the auto-capture trigger rather than tapping manually โ the automatic mode waits until the camera is stable.
After scanning, you can adjust the crop, apply color filters (color, grayscale, black and white), and rotate pages before saving. The black and white filter in particular makes text-heavy documents much cleaner and produces a significantly smaller file than a full-color scan.
Making a Scanned PDF Searchable
Scans from the iPhone camera are image-based PDFs โ the text looks right visually but isn't selectable or searchable. If you need to search the content, copy text, or have the file indexed, run it through an OCR PDF tool after scanning. Upload the scanned PDF to WukongPDF, convert it with OCR, and download the searchable version. The process adds a text layer without changing how the document looks.
For receipts, invoices, or records you'll need to reference later, making the scan searchable saves significant time โ you can find specific transactions or dates with a simple search rather than opening files one by one.
Compressing and Sharing the Scanned PDF
Multi-page color scans can produce large files โ a five-page scan in color might be 10โ20 MB. Before emailing or uploading, run it through a PDF Compression tool to bring the size down. Most scanned PDFs compress dramatically since the image areas contain significant redundant data.
Once compressed, share the PDF from the Files app by tapping and holding the file, selecting Share, and choosing your preferred method โ Mail, Messages, AirDrop, or a cloud storage app. The whole workflow from scan to share takes two or three minutes on iPhone.