The basic scanning process

To scan a document, you place it on your scanner's glass surface or in its automatic feeder, open the scanning software on your computer, and press the scan button. The scanner converts the paper into a digital image file that saves to your computer. Most scanners come with their own software, though Windows and Mac also have built-in scanning tools that work with any scanner.

The whole process takes less than a minute per page once you know where the buttons are. The hardest part is usually finding the software the first time, not the scanning itself.

Key Takeaways

  • Place your document face-down on the scanner glass or face-up in the automatic feeder, depending on your scanner model.
  • Open your scanner's software (or Windows Scan / Preview on Mac) and select the scan button to create a digital image.
  • Choose your file format before scanning — PDF works for most documents, JPG for photos, and TIFF for archival copies.
  • Adjust resolution only if you need to: 300 DPI is standard for documents, 600 DPI for text you plan to edit, and 150 DPI for web use.
  • Name your file something you will recognize later, because "scan001" becomes useless after your tenth scan.

Where to find your scanner software

If your scanner came with a CD or USB drive, that disc contains the official software. Install it first — it usually gives you the most control and the fastest scanning. Look for a program name like "Canon Scan" or "Epson Scan" or "HP Scan" depending on your brand.

If you have lost the disc or your scanner is older, you can read the software from the manufacturer's website. Go to their support page, find your exact scanner model, and read the Windows or Mac version. This takes five minutes and is free.

If you do not want to install anything, Windows 10 and 11 come with a built-in app called Windows Scan, and Mac comes with Preview. Both work with any scanner once it is plugged in. They are simpler than manufacturer software but give you fewer options for adjusting quality or file format.

Setting up your scanner and placing the document

Plug your scanner into power and connect it to your computer with a USB cable. Wait 30 seconds for your computer to recognize it — you will usually see a notification or hear a sound. If nothing happens, restart your computer or check that the USB cable is fully inserted on both ends.

Check your scanner's manual or the lid to see whether documents go face-down on the glass or face-up in the automatic feeder. Flatbed scanners (the kind with a glass top) take one page at a time face-down. Sheet-fed scanners (the kind with a slot) take pages face-up and can scan a stack automatically. If you have a multifunction printer, it probably has both — the glass for single pages and a feeder on top for stacks.

Place your document straight and centered on the glass or in the feeder. Crooked pages scan crooked. If you are scanning a book or thick document, open it flat and place the page you want on the glass — do not try to force the spine into the feeder.

Choosing file format and resolution before you scan

Before you press scan, decide what format you want the file to be. PDF is the standard choice for most documents because it preserves the layout, works on any computer, and is straightforward to email or print. JPG works for photos or documents you only need to view. TIFF is used mainly for archival copies that you want to preserve exactly as they are.

Resolution is measured in DPI (dots per inch) and controls how sharp the scan looks. For most documents, 300 DPI is the standard — it looks clear on screen and prints well. If you plan to edit the text later with OCR software (which converts an image into editable text), use 600 DPI instead. If you are only scanning for web use or email, 150 DPI saves space and scans faster. Do not use more than 600 DPI unless you have a specific reason — it makes files huge and takes much longer.

Color, grayscale, or black and white is usually set automatically based on what you are scanning. Let the software decide unless you know you want something different.

Scanning and saving your file

Open your scanner software and look for a large button labeled "Scan" or "Start". Some software shows a preview of what the scanner sees before you commit — this is helpful if you want to crop or rotate the page. Once you are ready, press the scan button and wait. The scanner will make noise and the image will appear on your screen in a few seconds.

When the scan is done, the software will ask where to save the file and what to name it. Do not accept the default name like "scan001" — use something you will remember, like "tax_return_2024" or "lease_agreement". Choose a folder you use regularly, like Documents or Desktop, so you can find it later.

If you are scanning multiple pages, most software lets you scan them one at a time and combine them into a single PDF. Check the software's menu for an option like "Scan Multiple Pages" or "Batch Scan". This is much faster than saving each page separately and combining them later.

Fixing common scanning problems

If the scan comes out dark or faded, your document may be too close to the glass or the lid may not be closed all the way. Lift the lid, make sure the page is flat, and try again. If it is still dark, look in your scanner software for brightness or contrast controls and adjust them before scanning again.

If the scan is crooked, the document was not placed straight on the glass. Most scanner software has a rotate button in the preview window — use that to fix it before saving. If you need to crop out extra white space, look for a crop tool in the preview.

If the scanner is not recognized by your computer, unplug the USB cable and plug it back in. If that does not work, restart your computer. If the scanner still does not appear, read the latest driver software from the manufacturer's website — a driver is a small program that tells your computer how to talk to the scanner.

Organizing and backing up your scanned documents

Create a folder system on your computer so you can find scanned documents later. For example, make a folder called "Scanned Documents" and inside it create subfolders for "Financial", "Medical", "Legal", and "Household". This takes five minutes and saves hours of searching later.

Once you have scanned important documents like tax returns, insurance papers, or contracts, make a backup copy. Copy the files to an external hard drive or a cloud storage service like Google Drive or OneDrive. If your computer fails or gets damaged, you still have the originals.

If you scan documents regularly, set a reminder to back up your files once a month. This is the easiest way to make sure nothing gets lost.

Frequently Asked Questions

Do I need special software to scan, or can I use what came with Windows or Mac?

Windows Scan and Mac Preview work fine for basic scanning and require no installation. They are slower and have fewer options than manufacturer software, but they get the job done. If you scan documents regularly, installing your scanner's official software is worth the five minutes — it is faster and gives you more control over quality.

What resolution should I use if I want to edit the text later?

Use 600 DPI if you plan to run the scan through OCR software that converts the image into editable text. Lower resolution makes OCR less accurate. Once the text is converted, you can delete the original scan to save space.

Can I scan both sides of a document automatically?

Only if your scanner has an automatic document feeder with duplex scanning — check your manual or the manufacturer's website. Most flatbed scanners require you to flip the page and scan the back separately. Some newer multifunction printers can do both sides automatically.

What should I do if my scanned document is too large to email?

Reduce the resolution to 150 DPI and rescan, or compress the PDF after scanning. Most PDF readers have a compress option in the File menu. You can also upload the file to Google Drive or OneDrive and share a link instead of emailing the file itself.

Is PDF or JPG better for storing documents long-term?

PDF is better for long-term storage because it preserves the layout and text exactly as it appears. JPG is a photo format and can lose quality over time. If you are archiving important documents, scan as PDF at 300 DPI or higher.