The basic process: scan, save, attach
To scan a document to email, you scan the paper into your computer or phone, save it as a file, and then attach that file to an email message. The steps differ slightly depending on whether you use a scanner connected to your computer, a multifunction printer with scanning capability, or a smartphone camera app.
Most people find the smartphone route fastest for one or two pages. A dedicated scanner or printer works better if you have many pages, need higher quality, or want to scan regularly without setting up your phone each time.
Key Takeaways
- Smartphone camera apps like Google Lens or your phone's built-in Notes app can scan documents without any additional equipment.
- A scanner or multifunction printer connected to your computer produces higher-quality scans and handles multiple pages faster than a phone.
- Save your scanned file as a PDF unless the recipient specifically asks for a different format like JPG or TIFF.
- Most email providers let you attach files up to 25 MB, so large scans or multiple documents may need to be compressed or split across separate emails.
- If your scan is too large to email, cloud storage services like Google Drive or Dropbox let you share a link instead of attaching the file.
Scanning with a smartphone camera
Your phone's camera can work as a scanner if you use the right app. Google Lens (built into most Android phones and available free on iPhone) can photograph a document and convert it to a clean, straight image. Open the app, point your camera at the document, and tap the Lens icon. The app will automatically crop and straighten the image, then let you save it as a PDF.
iPhone users can also open the Notes app, tap the camera icon, select "Scan Documents," and photograph each page. The phone will straighten and enhance the image automatically. When you finish, tap "Save" and choose where to store the scan.
After scanning, open your email app, start a new message, and tap the attachment button (usually a paperclip icon). Navigate to where you saved the scan and select it. The file will attach to your email and send with the message.
Scanning with a desktop scanner or printer
If you have a scanner or a multifunction printer (one that prints, copies, and scans), connect it to your computer with a USB cable or over your home network. Most devices come with software that handles scanning, but you can also use built-in tools on Windows or Mac.
On Windows, open the Settings app, go to Devices, and select "Printers and Scanners." Find your scanner in the list, click it, and select "Open Scanner." This launches the built-in scanning tool. On Mac, open the Applications folder, go to Image Capture, select your scanner, and click "Scan."
Place your document face-down on the scanner glass or face-up in the automatic feeder (if your scanner has one). Choose your scan settings: resolution (300 dpi is standard for documents), color mode (black and white for text, color for photos), and file format (PDF is best for email). Then click "Scan." The software will save the file to a folder you choose, usually your Documents or Desktop folder.
Saving your scan in the right format
PDF is the best format for sending documents by email. It preserves the layout and fonts, works on any computer or phone, and most email recipients expect it. When you scan, choose PDF as your file format if the option appears.
If your scanning software does not offer PDF, you can convert the file after scanning. On Windows, right-click the image file, select "Print," choose "Microsoft Print to PDF" as your printer, and click "Print." On Mac, open the image in Preview, go to File, and select "Export As." Choose PDF from the Format dropdown.
JPG format works if the recipient specifically asks for it or if you are sending photos rather than documents. TIFF format is rarely needed unless you are archiving documents for long-term storage or sending to a professional service.
Attaching the scan to your email
Open your email provider (Gmail, Outlook, Yahoo, or your company email) and start a new message. Type the recipient's email address, add a subject line, and write your message. Then look for the attachment button — usually a paperclip icon or a plus sign.
Click the attachment button and navigate to where you saved your scan. Select the file and click "Open" or "Attach." The file will upload to the email. You can attach multiple files if you need to send several scans in one message, but keep the total size under 25 MB (the limit for most email services).
Before you send, check that the file name is clear and professional. Rename it if needed — "Tax Return 2024" is better than "Scan001.pdf." Then click "Send."
What to do if your scan is too large
Large scans or multiple documents can exceed your email provider's size limit. If you see an error message saying the attachment is too large, you have two options: compress the file or use cloud storage.
To compress a PDF on Windows, right-click the file, select "Send To," and choose "Compressed (Zipped) Folder." On Mac, right-click the file and select "Compress." This reduces the file size, though it may lower the image quality slightly. Try sending the compressed version.
If compression does not work, use Google Drive, Dropbox, OneDrive, or iCloud. Upload your scan to the service, right-click the file, and select "Share." Set the permission to "Anyone with the link can view," copy the link, and paste it into your email instead of attaching the file. The recipient can view or download the scan without you needing to email a large file.
Tips for clean, readable scans
Place your document on a flat, well-lit surface before scanning. Remove any staples or tape. If you are using a smartphone camera, hold the phone directly above the document and make sure the entire page fits in the frame.
For scanner or printer scanning, clean the glass with a soft, dry cloth before placing your document. Use a resolution of at least 200 dpi for text documents; 300 dpi is better if the text is small. If you are scanning a color document, choose color mode; for black-and-white text, choose black and white to keep the file size smaller.
If you are scanning multiple pages, number them before you start so you can put them in order if they get mixed up. Some scanners and apps let you scan multiple pages into a single PDF file automatically — check your software's settings to enable this feature.
Frequently Asked Questions
Can I scan directly to email without saving a file first?
Some multifunction printers have a "Scan to Email" button that sends the scan directly to an email address without saving it to your computer first. Check your printer's manual or control panel to see if this feature is available. If it is, you will need to set up your printer with your email account information once.
What resolution should I use when scanning documents?
For text documents that you plan to read on screen or print, 200 to 300 dpi is standard. For documents with small print or fine details, use 300 dpi. For photos, 300 dpi is also good. Higher resolutions like 600 dpi create much larger files without noticeably better quality for most purposes.
Why does my scan look blurry or dark?
Blurry scans usually mean the scanner glass or camera lens is dirty, or the document moved during scanning. Clean the glass with a soft cloth and try again. Dark scans often happen when the brightness setting is too low. Check your scanning software for a brightness or contrast slider and adjust it before rescanning.
Can I scan both sides of a document in one go?
If your scanner has an automatic document feeder (ADF), it can scan both sides automatically if you enable duplex scanning in the software settings. If your scanner only has a glass bed, you will need to scan one side, flip the pages, and scan the other side, then combine them into one PDF file using your scanning software or a free online PDF tool.
What should I do if the recipient says they did not receive my scan?
Check that the file actually attached to the email before you sent it — sometimes attachments fail to upload. Resend the email and watch for the attachment icon to appear. If the file is very large, try compressing it or using a cloud storage link instead. Ask the recipient to check their spam folder, as large attachments sometimes get filtered there.