What is a TIFF file, and how do you open a scanned .tif?
What to do with a .tif that is huge, won't open or shows only one page
The document from your scanner, an attachment sent by a solicitor's or insurer's office, or a message saved by fax software is sitting there with a .tif or .tiff extension. The file is far larger than you expected, your phone shows no preview, and dragging it into a web browser does nothing. Even when it does open on the computer, a document that should have twelve pages shows only the first. This guide explains those four complaints one by one and shows how to make the file usable without losing a page.
First, know this: TIFF is not a document format but an image container. It holds a picture of one page, or of many pages. So your file is most likely not damaged; it simply was not designed with today's phones and browsers in mind.
Where TIFF files come from and why they are still around
TIFF dates from the early days of desktop scanners and fax systems, and it is still alive in that world. Plenty of scanning software, office document archives and fax-to-email services save to it by default. That is usually why a medical practice, an insurer or an accountant sends you a .tif: the file was not chosen by a person but produced by a system that has run on the same settings for years.
Archivists like TIFF for three reasons. It can store an image with no loss at all, it records the DPI each page was scanned at, and it can keep dozens of pages in order inside one file. That last point matters most to you: the .tif in front of you may not be one picture but a document that behaves like a small folder of pages.
Why is the file so big?
Most of the time the size comes from no compression being applied. Scan an A4 page at 300 DPI and the image is 2480 × 3508 pixels, roughly 8.7 million dots. In a colour scan each dot takes 3 bytes, so without compression a single page passes 26 MB. The table shows the raw size of that same page by scan mode; the figures are calculated from the pixel count. A US Letter page at the same DPI comes out slightly smaller.
The practical takeaway: a ten-page colour scan saved without compression approaches 260 MB, while the same document in black-and-white mode stays around 11 MB. That is why fax TIFFs are small; the pages are already black and white and squeezed with a fax-specific method. If you can scan again, set the colour mode in your scanning software to black and white or greyscale for text documents, and where possible choose PDF directly as the save format.
| Scan mode (A4, 300 DPI) | Per dot | Uncompressed page |
|---|---|---|
| Colour | 24 bits (3 bytes) | ≈ 26.1 MB |
| Greyscale | 8 bits (1 byte) | ≈ 8.7 MB |
| Black and white | 1 bit | ≈ 1.1 MB |
Why it won't open, or shows a single page
Chrome, Edge and Firefox do not display TIFF; drop the file into a window and it either downloads again or leaves a blank tab. Safari does open it. Phone galleries and the previews in mail apps also tend to go silent on this format. So "it won't open" is in most cases a limit of the program receiving the file, not of the file itself.
The sneakier problem is seeing only one page. Some viewers show just the first page of a multi-page TIFF and offer no arrow to the next one; the Windows Photos app has drawn complaints about this for years. People then assume the document arrived incomplete and write back to the sender. If you open it in Preview on a Mac, choose View > Thumbnails and the pages line up in the sidebar.
The easiest way to know the page count for sure is to give the file to the TIFF to PDF tool: the result line states how many pages were processed. The TIFF to JPG tool also labels every image with its position, such as "page 3/12".
PDF or JPG? Decide by what you will do next
A multi-page TIFF can be opened in two different ways, and the right one depends on your next step. The diagram shows both side by side: the upper route keeps the pages together in one document, the lower one splits every page into its own image.
| What will you do? | Right output |
|---|---|
| Send the document back to an office or by email | PDF: one file, page order kept |
| Share a single page in a message | JPG: download just that page |
| Upload it to a form as an image | JPG, if that is what the form asks for |
| Keep a signature or fine print crisp | PNG: lossless, letter edges stay sharp |
| Keep the original in an archive | Do not delete the TIFF; store the converted copy beside it |
How the two tools on this site handle the pages
TIFF to PDF turns each TIFF file into its own PDF and carries every page across in order. It sets the page size from the DPI stored in the scan; when that information is missing, it fits the pages to Letter on the English site. Pure black-and-white pages are embedded without loss, colour pages are written as JPEG. Select several TIFFs and you get one PDF per TIFF; to read them as one document, give the downloads to the Merge PDF tool.
TIFF to JPG makes every page a separate image and numbers it: a twelve-page scan.tif runs from scan-01.jpg to scan-12.jpg. Each image gets its own Download button and no ZIP is produced, so for a thirty-page file the PDF route saves a lot of clicking. If you only need the cover, the "First page only" option skips the rest entirely. Both tools also correct the squashed look that fax pages often have.
Know the limits too. A single page above 60 million pixels is refused to protect phone memory: an A4 scan at 600 DPI is about 35 million pixels and passes, an A3 at 600 DPI comes close to 70 million and does not. Old-style JPEG-compressed, 16-bit, CMYK or layered TIFFs can trip the decoder; in that case the tool tells you which page failed. With both tools the file never leaves your device; decoding happens inside your browser.
The other way round: when someone asks you for a TIFF
Sometimes the job is reversed: an office's archive system or fax server accepts only TIFF, while the document on your desk is a PDF. The PDF to TIFF tool writes every page of the PDF into one multi-page TIFF. You can choose 150, 200 or 300 DPI; greyscale keeps the file small for text documents, colour is the right pick when there is a logo or photo.
Ask the recipient which DPI they want; if they do not say, the middle value is usually enough for text. Before sending, feed the result back into TIFF to PDF once to check the page count, which saves you from an application filed with a missing page.
Frequently asked questions
Are .tif and .tiff the same thing?
Yes, they are the same format. The three-letter version is a leftover from old systems that limited file name extensions; some programs write .tif, others .tiff. The tools accept both.
How do I open a TIFF on my phone?
Open the TIFF to PDF tool in your phone's web browser, pick the file and convert it. The resulting PDF opens on any phone. If you want a single page in your photo gallery, use TIFF to JPG and download just that page.
Will converting lower the quality?
On the PDF route, black-and-white and greyscale pages are written without loss and colour pages become high-quality JPEG. On the JPG route the quality setting defaults to 90; for a fully lossless copy, set the output format to PNG.
Can I copy the text from a scanned TIFF?
Not directly. A TIFF page is a photograph with no selectable letters in it, and turning it into a PDF does not change that. Making the text selectable needs a separate program that performs text recognition (OCR).
I only need one page. Do I have to convert them all?
No. TIFF to JPG lists the pages as separate images; press Download only on the one you need. If the cover page is enough, the "First page only" option makes the job even shorter.
Last updated: October 12, 2026