Yes, you can fax a photo or screenshot straight from your iPhone: pick it in the FaxUp app or on faxup.net/send in Safari, crop it to the paper, and send. Each photo becomes one fax page; even light and a plain background make it readable.
Sometimes the only copy you have is a photo: a receipt you snapped, a signed page someone texted you, a screenshot of a confirmation. You can fax it as it is. A little preparation decides whether it is readable on the other end.
Send it
In the FaxUp app: start a fax, choose a photo from your library, crop it to the paper, and send. You can also share a photo from Photos to FaxUp with the Share button.
In Safari: open faxup.net/send, tap to add a file and pick from your photo library. You can pick several photos at once, up to 10 files in total. Each photo becomes one Letter page, scaled to about 200 dots per inch, so a large camera photo is sent as a much smaller file.
HEIC photos are fine. According to Apple, iPhone 7 and later can capture photos in HEIF (set under Settings, Camera, Formats: High Efficiency, or Most Compatible for JPEG), and both the app and faxup.net accept them.
What a photo looks like as a fax
A fax machine prints in pure black and white at a resolution set by the fax standard (ITU-T T.4), around 200 lines per inch in fine mode. That has three effects on a photo:
- Shadows become marks. The shadow of your phone or hand across the page can print as a grey-black band.
- Color is gone. Blue ink usually survives; yellow highlighter, pale stamps and pencil often vanish.
- The background matters. A page photographed on a wooden table prints the wood grain as noise around the page.
The fax preview shows you this black-and-white result for any photo, in your browser, before you pay.
Get a readable result
- Crop to the paper. In the FaxUp app, crop in the editor; in Photos, use Edit and crop before you add the photo.
- Shoot straight on. Hold the phone parallel to the page so lines of text stay level.
- Use even light. Daylight from a window beside you is better than a ceiling lamp above.
- Use a dark, plain surface so the page edge is clear.
- One page per photo. Two pages in one photo end up at half size on one fax page.
For paper documents, the app's scanner or the free phone document scanner does steps 1 to 4 for you: it finds the edges, flattens the perspective and raises the contrast.
Screenshots
A screenshot is a tall image, and it is scaled to fit one Letter page. A full-length phone screenshot ends up as a narrow strip with small text. Crop it to the part the recipient needs, or zoom in and take two screenshots.
Several photos in a set order
Add them in the order they should print. Or combine them first with image to PDF, which also lets you choose Letter or A4, and then fax the one PDF.