The fastest way depends on what you have

If you have a smartphone, you can scan most documents without buying anything. Open the Notes app on iPhone or Google Keep on Android, tap the camera icon, and select "Scan Documents" — the phone will capture the page, straighten it automatically, and save it as a PDF. On Android, Google Drive also has a built-in scanner: open the app, tap the plus sign, then "Scan".

If you have a dedicated scanner, plug it into your computer via USB, open the scanner's software (usually installed automatically), place the document face-down on the glass, and click Scan. The file saves to your computer as a PDF or image file. Most scanners come with their own app; Canon uses CanoScan, HP uses HP Scan, and Epson uses Epson Scan.

If you don't have either, you can use a multifunction printer that has scanning built in — many modern printers do. Place the document on the glass, press the Scan button on the printer itself, and it will save to a USB drive or email the file to you directly.

Key Takeaways

  • Your phone's built-in camera app or Notes app can scan documents without installing anything extra, and the result is usually good enough for email or storage.
  • A dedicated scanner produces sharper, more consistent results and is faster if you have many pages, but requires a computer and the scanner's software.
  • Multifunction printers can scan without a computer — you place the document on the glass and press the Scan button on the printer itself.
  • Most scanners save as PDF or JPG; PDF is better for text documents and email, while JPG works for photos or images you might edit later.

Scanning with your phone's camera

On iPhone, open the Notes app, create a new note, and tap the camera icon at the bottom. Select "Scan Documents" from the menu. Hold the phone 6 to 8 inches above the document and tap the shutter button — the phone will capture the page, auto-crop it, and apply a filter that makes text darker and the background whiter. You can scan multiple pages in one session; they all go into a single PDF. When you're done, tap Save, name the file, and it goes into Notes. To share it, tap the three dots, then "Share PDF".

On Android, open Google Keep, create a new note, and tap the image icon. Select "Take a photo" and then "Scan" from the bottom menu. The process is similar — the phone captures the page, straightens it, and darkens the text. You can add multiple pages. When done, tap the checkmark. To share, tap the three dots and choose "Share".

Alternatively, open Google Drive on Android, tap the plus sign, select "Scan", and follow the same steps. The file saves directly to your Drive as a PDF, which is useful if you want it in the cloud immediately.

Phone scanning works best in good lighting. If the room is dim, the text may come out blurry. Avoid shadows across the document, and keep the phone as level as possible — tilting it at an angle makes the text harder to read in the final scan.

Scanning with a dedicated scanner

Place your document face-down on the scanner's glass, with the top edge toward the back of the machine. Open the scanner's software on your computer — if it's not installed, download it from the manufacturer's website using your scanner's model number. Most software has a preview button that shows you what the scan will look like before you commit.

In the software, choose your settings: resolution (measured in DPI, or dots per inch) affects file size and sharpness. For text documents, 300 DPI is standard and produces a clear, readable file without being huge. For photos or artwork, use 600 DPI or higher. Choose color mode — "Color" for photos, "Grayscale" for black-and-white documents, and "Black and White" for text-only pages where you want the smallest file size.

Select where to save the file and what format — PDF is best for documents you'll email or archive, because it preserves formatting and is hard to accidentally edit. JPG is smaller and works for images. Click Scan, and the software will save the file to your chosen folder.

If you're scanning a multi-page document, some scanners have an automatic document feeder (ADF) — a tray that holds a stack of pages and feeds them through one at a time. If your scanner has one, load the stack, select "Continuous Scan" or "Batch Scan" in the software, and it will scan all pages into a single file.

Scanning from a multifunction printer

Place the document face-down on the glass or in the automatic feeder, just as you would for a scanner. On the printer's control panel (the screen or buttons on the front), look for a button labeled "Scan", "Copy", or a green button with a scanner icon. Press it.

The printer will ask where to send the file. Most multifunction printers can save to a USB drive plugged into the printer itself, email the file to an address you set up in the printer's settings, or send it to a computer on the same network. Choose your destination and press Start or OK. The printer will scan the page and save the file — usually as a PDF.

If you're not sure how to set up email or network scanning on your printer, check the manual or search "[Your Printer Model] how to scan to email" online. The setup is usually a one-time task.

Cleaning up your scans

After scanning, you may want to crop out blank space, rotate pages that came out sideways, or adjust brightness if the text is faint. On iPhone, open the PDF in Notes, tap Edit, and use the crop tool. On Android, open the PDF in Google Drive, tap the three dots, select "Open with", and choose a PDF editor like Adobe Acrobat Reader (free version) or Markup.

If you scanned multiple pages and they ended up in separate files, you can combine them into one PDF using free online tools like ILovePDF or Smallpdf — upload the files, arrange them in order, and download the merged PDF. Most PDF readers also let you rearrange or delete pages after scanning.

For documents with very faint text, rescan at a higher resolution or in a brighter room. For pages that came out crooked, most scanner software has a "deskew" option that straightens them automatically.

Choosing between phone, scanner, and printer

Use your phone if you need to scan one or two pages quickly, don't have a scanner nearby, or want the file in the cloud immediately. Phone scans are good enough for email, sharing, or storage, and you always have your phone with you.

Use a dedicated scanner if you scan documents regularly, need very sharp text for archiving, or have many pages to process at once. Scanners are faster for batch jobs and produce more consistent results, but they require a computer and take up desk space.

Use a multifunction printer if you already own one and don't want to buy a separate scanner. Printer scans are slower than dedicated scanners and the quality varies by model, but you don't need a computer — the printer handles everything.

If you're choosing between buying a scanner or a multifunction printer, consider how often you print. If you print regularly, a multifunction printer saves money and space. If you rarely print but scan often, a dedicated scanner is worth it.

File formats and storage

PDF is the standard for scanned documents. It preserves the layout, works on any device, and is hard to accidentally change. Most scanners and phones save as PDF by default.

JPG is smaller and works for photos or images, but it's not ideal for text documents because the text can look slightly blurry. Use JPG only if you need a smaller file and don't plan to print the scan.

TIFF is a high-quality format used by archives and professionals, but files are very large and not all devices can open them easily. You probably don't need TIFF unless you're scanning for a library or legal firm.

After scanning, store your files in a cloud service like Google Drive, OneDrive, or Dropbox so you can reach them from any device. Create a folder structure — one folder per year, or one per project — so you can find scans later. If the document is sensitive (tax returns, medical records), use a service with encryption or store it on an external hard drive instead.

Frequently Asked Questions

Can I scan a document without a scanner or printer?

Yes. Your phone's camera app or Notes app can scan documents. The quality is usually good enough for email and storage, though not as sharp as a dedicated scanner. If you don't have a phone, some libraries and FedEx stores have public scanners you can use for a small fee.

What resolution should I use when scanning?

For text documents, 300 DPI is standard and produces a clear, readable file. For photos or artwork, use 600 DPI or higher. Higher resolution makes larger files; if file size matters, stick with 300 DPI for text.

Why does my scan look crooked or blurry?

Blurriness usually means low resolution, poor lighting, or the scanner glass is dirty. Try cleaning the glass with a soft cloth, rescanning in brighter light, or increasing the DPI. Crooked pages happen when the document isn't aligned straight on the glass; most scanner software has an auto-straighten option.

Can I scan both sides of a document at once?

No scanner captures both sides in one pass. You must scan one side, flip the document, and scan the other side. Some scanners have an automatic document feeder that makes this faster — you load a stack of double-sided pages and the feeder turns them over automatically.

What's the best way to store scanned documents long-term?

Use a cloud service like Google Drive or OneDrive for documents you need to reach from multiple devices. For sensitive documents, use a service with encryption or store on an external hard drive kept in a safe place. Create a folder system so you can find old scans — organize by year or by document type.