TIFF is a way to store photographs and scanned documents that keeps all the detail without shrinking file size

Tagged Image File Format, or TIFF, is a file type that holds pictures and scanned documents. Unlike JPEG files, which throw away some image information to make the file smaller, TIFF keeps everything — every pixel, every color value, every detail. This makes TIFF files much larger, but it also means you can edit them repeatedly without losing quality.

You will most often see TIFF files when you scan a document at a bank or doctor's office, when a photographer delivers professional photos, or when you read an image from a government website. The file will end in .tif or .tiff. Most computers can open TIFF files with the default photo viewer, though some older programs may struggle with them.

The name comes from how TIFF works: it stores information in tags — small pieces of data that describe what the image contains and how it should be displayed. This tagging system is what lets TIFF hold so much information without losing it.

Key Takeaways

  • TIFF files preserve all image detail and can be edited many times without quality loss, making them standard for professional photography and document scanning.
  • TIFF files are much larger than JPEG files because they do not discard any image information.
  • You can open TIFF files with your computer's built-in photo viewer, though some older software may not recognize them.
  • Government agencies and banks often use TIFF for official documents because the format does not degrade when copied or archived.

Why TIFF files are so much bigger than JPEG

A JPEG file works by analyzing an image and deciding which details the human eye probably will not notice — then it throws those details away. This compression happens automatically and you cannot undo it. A photograph that is 5 megabytes as a TIFF might be 500 kilobytes as a JPEG, a tenfold difference.

TIFF does the opposite. It stores the image exactly as it was captured or scanned, with no information removed. If you edit a TIFF file and save it, the next person who opens it sees your exact edits — not a blurry approximation. This is why photographers and document archivists use TIFF: they need to know that what they are looking at is what actually exists, not a simplified version.

The tradeoff is obvious: TIFF files take up much more storage space and take longer to email or upload. For a casual photo you want to share with family, JPEG is almost always the better choice. For a document you need to keep for ten years, or a professional photo you might edit later, TIFF is worth the space.

When you will encounter TIFF files in daily life

Banks and government offices often ask you to scan documents and upload them as TIFF or PDF. TIFF is preferred because it preserves the exact appearance of the original — handwriting, signatures, and small print all stay sharp and readable. If you scanned a check as a JPEG and the bank's system compressed it further, the signature might become unreadable.

Professional photographers deliver photos in TIFF format because clients may want to edit them later or print them very large. A TIFF file can be enlarged without the blurriness that happens when you enlarge a JPEG. Medical imaging — X-rays, MRI scans, ultrasounds — also uses TIFF or similar lossless formats because doctors need to see every detail.

You may also encounter TIFF when downloading images from library websites, museum collections, or historical archives. These institutions use TIFF because they want to preserve the image in its highest quality for future generations, even if the file is enormous.

How to open and work with TIFF files

On Windows, right-click the TIFF file and select "Open with" — your default photo viewer (Photos, Windows Photo Viewer, or similar) will open it. On Mac, double-click the file and it will open in Preview. Both programs let you view the image and zoom in to see detail, though neither is designed for serious editing.

If you need to edit a TIFF file — crop it, adjust colors, or add text — you will need photo editing software. Photoshop handles TIFF files perfectly and preserves all the quality. Free alternatives like GIMP also work, though they are more complex. For straightforward tasks like rotating or cropping, many online tools will convert your TIFF to a format they can handle, edit it, and convert it back.

If someone sends you a TIFF file and you need to share it with others who may not have software to open it, converting it to JPEG or PNG is usually safe — unless the file contains text or signatures that must stay perfectly sharp. Many free online converters will do this in seconds.

TIFF versus other image file types

JPEG is smaller and faster, which is why it dominates on the internet and in email. PNG is also lossless like TIFF, but PNG files are usually smaller and work better for images with text or graphics rather than photographs. GIF is an older format mostly used for straightforward animations. PDF is not an image format at all, but it is often used for documents because it preserves layout and fonts across different computers.

For most everyday purposes — sharing photos, posting to social media, emailing pictures — JPEG is the right choice. TIFF is the right choice when you need to preserve every detail, when you plan to edit the image many times, or when an organization specifically asks for it. PNG is a good middle ground: it is lossless like TIFF but smaller, though not as small as JPEG.

Why some organizations require TIFF for official documents

When you submit a scanned document to a bank, insurance company, or government office, they may specify TIFF or PDF. They do this because TIFF does not degrade when copied, archived, or transferred between systems. A JPEG might look fine on your screen but become blurry or unreadable after being processed by multiple computer systems.

TIFF files also include metadata — information about when the file was created, what device scanned it, and other details — that can be important for legal or archival purposes. This is why courts, hospitals, and government agencies often require TIFF for documents that must be kept for years or decades.

Frequently Asked Questions

Can I convert a TIFF file to JPEG or PNG?

Yes. You can use free online converters, photo editing software, or even your operating system's built-in tools. Right-click the TIFF file, select "Open with" and choose an image editor, then use "Save As" to choose a new format. The conversion is when ready and usually painless, though you will lose some quality if you convert to JPEG.

Why is my TIFF file so huge?

TIFF stores every pixel of information without compression. A high-resolution photograph can easily be 50 to 100 megabytes as a TIFF. If you need to email it or upload it, converting to JPEG will shrink it dramatically — usually to 5 to 10 megabytes — with little visible difference on a screen.

Do I need special software to open a TIFF file?

No. Your computer's built-in photo viewer will open TIFF files. On Windows, that is the Photos app; on Mac, it is Preview. If you need to edit the TIFF, you will need photo editing software like Photoshop or the free program GIMP.

What is the difference between .tif and .tiff?

There is no difference. Both extensions refer to the same file format. The shorter .tif was used on older computers that limited file extensions to three letters. Modern systems accept both, and you can rename one to the other without any problem.

Should I scan documents as TIFF or PDF?

Either works for most purposes. TIFF is slightly better if you might need to edit individual pages or extract images later. PDF is better if you want to combine multiple pages into one file or if the recipient specifically asks for PDF. Many scanners let you choose at the moment you scan.