How to Fax a TIFF or TIF File Online (2026)

TIFF files are common in offices that scan, archive, or exchange records. You may see either .tif or .tiff; for faxing, they refer to the same image format.

Onetime Fax accepts both TIF and TIFF uploads, including multi-page TIFF files.

Quick Steps: Fax a TIFF Online

1. Open Onetime Fax.
2. Enter the recipient’s fax number.
3. Enter your email for delivery confirmation.
4. Upload your .tif or .tiff file.
5. Wait for processing and page counting.
6. Review the document list.
7. Pay and send.

For a broader walkthrough, see How to Send a Fax Online.

When TIFF Is Used for Faxing

TIFF is common for:

• Scanned medical records
• Legal files
• Government forms
• Insurance documents
• Archived business records
• Multi-page scanned packets

Many legacy document systems still export TIFF because it preserves scanned pages well.

TIF vs TIFF

There is no meaningful difference for faxing. .tif is the shorter extension; .tiff is the longer one. Onetime Fax accepts both.

Multi-Page TIFF Files

A TIFF can contain one page or many pages. Multi-page TIFFs are common when a scanner saves an entire packet into one file.

If your TIFF has multiple pages, allow time for page counting and processing after upload. Once the document appears in the file list, continue with checkout and sending.

TIFF vs PDF for Faxing

TIFF is a strong scan format, but PDF is usually easier for people to preview and share.

Upload TIFF directly when:

• The file already came from a scanner.
• It is a multi-page TIFF packet.
• You do not want to run a separate converter.

Convert to PDF first when:

• You need to combine TIFF with other files.
• You want to rearrange pages.
• You need to add a cover page or annotations before uploading.

Onetime Fax can handle TIFF uploads directly, so conversion is optional.

Quality Tips for TIFF Scans

Before sending, check:

• Resolution is high enough for small text.
• Pages are upright.
• Blank pages are removed.
• Black-and-white scans are high contrast.
• The file opens correctly on your computer.
• No pages are missing from a multi-page TIFF.

If a TIFF looks faint or gray, rescanning in black-and-white or grayscale can help.

Common Problems

The TIFF is unreadable

Open it locally before uploading. If your computer cannot preview it, export it again from the scanner software or convert it to PDF.

Page count looks wrong

Multi-page TIFF files can be tricky if the file is damaged. Re-export the scan or split it into PDF pages.

The file is very large

Large TIFFs may take longer to upload and process. If it is practical, export a compressed PDF from the scanner.

The fax failed

The issue may be the destination number or receiving fax machine, not the TIFF. See Fax Troubleshooting.

Bottom Line

TIFF and TIF files are valid fax formats, especially for scanned records. Upload the file directly, wait for processing, and send from your browser.