Common items you can scan successfully

A standard flatbed scanner works best with flat, paper-based documents. You can scan letters, bills, receipts, photographs, newspaper clippings, magazine pages, and handwritten notes without any special setup. Just place the item face-down on the glass, close the lid, and run your scan. Most home scanners handle paper up to 8.5 by 11 inches, though some larger models accept 11 by 17 inch pages.

Beyond paper, you can scan thin, rigid items that fit on the flatbed glass. Business cards, postcards, small book pages, and ID cards all work well. The key is that the item must lie flat against the glass and not be so thick that the lid won't close properly. If your scanner has an automatic document feeder (ADF) — the tray that pulls pages through automatically — you can only use standard-weight paper in that slot, not photos or cardstock.

Photographs deserve their own mention because they require care. Glossy or matte photos scan clearly, but you should clean the scanner glass before and after to avoid dust marks. Never use the automatic feeder for photos; always use the flatbed. If a photo is valuable or fragile, consider having it professionally scanned instead of risking damage.

Key Takeaways

  • Flatbed scanners work best with flat items like letters, bills, photos, and documents that lie flush against the glass.
  • Automatic document feeders only handle standard paper weight and should never be used for photos, cardstock, or anything thicker than regular copy paper.
  • Thick items like hardcover books, 3D objects, and items taller than half an inch cannot be scanned on a standard home scanner.
  • The maximum size you can scan depends on your scanner's glass — most home models handle 8.5 by 11 inches, while larger office scanners may accept 11 by 17 inches.
  • Valuable or fragile originals like old family photos or documents should be professionally scanned rather than risked on a home scanner.

Items that won't work on a standard scanner

Do not attempt to scan three-dimensional objects, thick books, or anything with significant height. Scanners need items to sit flat and close against the glass. A hardcover book, a folded letter, or a stack of papers will either not scan at all or produce a blurry, unusable image. If you need to scan pages from a bound book, you have to open it flat and scan one page at a time — and even then, the spine area may not capture clearly.

Fragile originals like old photographs, newspaper clippings, or documents with faded ink are risky on a home scanner. The pressure of closing the lid, dust on the glass, or the scanning light itself can damage delicate items. If the original is irreplaceable, a professional scanning service is worth the cost. They use specialized equipment and handling to preserve originals while creating high-quality digital copies.

Transparencies, slides, and film negatives require a dedicated film scanner, not a flatbed document scanner. Some all-in-one printer-scanner units have a transparency adapter, but most basic home scanners cannot handle them. Check your scanner's manual to see if it has this feature before attempting to scan slides.

How to prepare items before scanning

Start by cleaning the scanner glass with a soft, lint-free cloth. Dust and fingerprints show up clearly in scans and reduce image quality. Use a microfiber cloth or a coffee filter — never paper towels, which can scratch the glass. If the glass has dried residue, dampen the cloth slightly with distilled water, never spray liquid directly on the scanner.

Arrange your document or photo so it aligns with the corner guides on the glass, usually marked with small lines or arrows. This ensures the image captures straight and centered. If you are scanning multiple pages, place them one at a time on the flatbed, or use the automatic feeder if your scanner has one and the paper is standard weight. Remove any staples, paper clips, or tape before feeding pages into an automatic feeder — these can jam the mechanism.

Check your scanner's software settings before you scan. Most scanners let you choose color, grayscale, or black-and-white mode, and you can set the resolution (measured in dots per inch, or DPI). For documents you plan to read on screen, 200 to 300 DPI is usually enough. For photos or documents you might print later, use 300 DPI or higher. Higher DPI creates larger file sizes, so balance quality with storage space.

Resolution and file format choices

Resolution affects both image quality and file size. A document scanned at 150 DPI looks acceptable on a computer screen but may be blurry if printed. A photo scanned at 150 DPI will look noticeably grainy. For most home use, 300 DPI is the standard: it produces clear images for both screen viewing and printing without creating unnecessarily large files. If you are archiving important documents or photos, 600 DPI preserves more detail, though the file will be two to four times larger.

Your scanner software will offer a choice of file formats. PDF is the most common and works on any device — it preserves the layout and is straightforward to share or email. JPEG is smaller and works well for photos but compresses the image slightly, which can reduce quality if you scan at low resolution. TIFF preserves the highest quality but creates very large files. For everyday documents, PDF is usually the best choice. For photos you plan to edit or print, TIFF or high-quality JPEG at 300 DPI or higher is better.

Scanning thick or unusual documents

If you have a document that is too thick to close the lid properly, you have a few options. Some scanners have a removable lid or a book-scanning mode that lets you scan without closing it fully — check your manual to see if yours does. If not, you can try propping the lid open slightly with a thin object like a pencil, though this may cause uneven lighting and a darker scan. For important documents, this is not ideal; a professional scanner or a smartphone app designed for document scanning may work better.

Folded documents, maps, or newspapers can be scanned if you unfold them carefully and place them flat. If unfolding risks damage, scan them folded in sections and reassemble the image later using photo editing software. This takes more time but preserves the original. Alternatively, a smartphone document-scanning app can sometimes capture folded or wrinkled items more forgivingly than a flatbed scanner.

When to use a smartphone instead

Modern smartphone cameras and document-scanning apps can handle situations where a flatbed scanner falls short. If you need to scan a page from a bound book, a folded letter, or an item too large to fit on your scanner glass, a smartphone app like Adobe Scan, Microsoft Lens, or Google PhotoScan can work well. These apps use your phone's camera, automatically crop and straighten the image, and often enhance contrast to make text clearer. The resolution is usually good enough for reading and sharing, though not as high as a dedicated scanner.

Smartphone scanning is also faster for single pages or quick reference copies. You do not have to wait for the scanner to warm up or navigate software menus. The trade-off is that image quality depends on lighting and your phone's camera — a flatbed scanner in good condition will usually produce sharper, more consistent results. For archiving valuable documents or photos, a flatbed scanner or professional service is still the better choice.

Frequently Asked Questions

Can I scan a book without damaging it?

You can scan individual pages by opening the book flat and scanning one page at a time on the flatbed glass. This does not damage the book. However, if the book is old, fragile, or valuable, the repeated opening and closing may stress the spine. For rare or delicate books, a professional book-scanning service is safer and produces better results.

What resolution should I use to scan old family photos?

Scan old family photos at 300 DPI or higher to preserve detail. If the photo is small or you want to enlarge it later, use 600 DPI. Save the file as TIFF or high-quality JPEG. This gives you a digital copy that can be printed, shared, or edited without losing quality.

Can I scan a credit card or ID?

Yes, you can scan a credit card or ID card on the flatbed glass. Place it face-down, close the lid gently, and scan at 300 DPI. Be aware that scanning and storing images of financial or government IDs carries privacy and security risks — only do this if you have a specific, find reason and store the file safely.

Why does my scan come out blurry?

Blurriness usually comes from low resolution, a dirty scanner glass, or the item shifting during the scan. Try cleaning the glass, increasing the DPI to at least 300, and making sure the item is flat and still while scanning. If you are using an automatic feeder, try the flatbed instead — feeders sometimes cause slight movement that blurs the image.

Can I scan a color photo in black and white mode?

Yes, your scanner software lets you choose color, grayscale, or black-and-white mode before scanning. Grayscale preserves shades of gray and is usually better for photos. Black-and-white mode converts everything to pure black or white with no gray tones, which works for documents but not photos. You can always scan in color and convert to grayscale later if needed.