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You can fax photos and images, but fax is black-and-white and built for text, so photos arrive as rough grayscale copies with lost detail. Boost contrast, use fine mode, and crop tightly before sending, and send the original by another route when exact detail matters.
Fax was designed in an era when a page meant typed text, and its settings reflect that. A standard fax scans each page as black or white dots, with no true grey in between, and the receiving machine recreates shades by grouping those dots into patterns. That technique, called halftoning, works passably for a simple logo but turns a photograph's smooth tones into a grainy, blotchy copy. Colour vanishes entirely, since fax has no colour channel at all, and subtle differences in skin tone, sky, or fabric collapse into similar greys.
Resolution is the second limit. Standard fax mode is coarse compared with a modern phone camera or scanner, so fine detail such as eyelashes, small text in an image, or distant faces simply does not survive. Fine mode doubles the vertical detail and helps noticeably, but it still falls far short of a photograph's original quality. A faxed photo is a recognizable copy, not a reproduction, and anyone expecting the latter will be disappointed.
| Setting | Effect on photos | When to use it |
|---|---|---|
| Standard mode | Coarse detail, heavy grain in shaded areas | Only when speed matters more than legibility |
| Fine mode | Clearly better detail, slower send | Default choice for any photo or image |
| Photo or halftone mode, if offered | Smoother shading, less banding | Best option when the machine or service offers it |
| Higher contrast before sending | Dark areas stay dark, light areas stay light | Photos that arrive washed out or muddy |
Start with the original, not with a printout of a printout. Scan a physical photograph directly, or send the digital file itself through an online fax service, rather than photographing a printed photo with a phone and faxing that image. Each extra copy step adds grain and loses detail, and a phone photo of a glossy print adds glare on top.
Before sending, raise the contrast slightly and brighten mid-tones a touch. Photos that look perfect on a screen often arrive dark and muddy by fax, because fax treats the middle greys harshly. Crop tightly around the subject and enlarge it to fill the page: a small photo in the middle of a blank page wastes most of the fax's limited detail on empty space, while a cropped, full-page image gives the recipient the most the medium can offer. If the image includes text, such as a caption or a sign in the photo, enlarge that text as well, since small text is the first thing to blur.
High-contrast images fax best: a dark signature on white paper, a simple line drawing, a black-and-white diagram, or a photo of a single subject against a plain background. Low-contrast images fax worst: a foggy outdoor photo, a group shot in dim light, a photo with many similar tones, or any image where the important detail sits in shadow. Colour-coded information, such as a chart that relies on red versus green, becomes meaningless in black and white, so redraw that information with labels or patterns before faxing.
Medical images deserve a special warning. X-rays, scans, and dermatology photos sent by fax lose exactly the subtle shading that a clinician needs to see, and many clinics will not accept a faxed image as a substitute for the original file. If a doctor or insurer asks for an image by fax, ask whether a secure file upload or a mailed print would be accepted instead. For identification photos, such as a passport photo faxed for verification, expect the recipient to treat it as a rough confirmation only, and to ask for the original document by another route.
Ask what the recipient actually needs. If they need to recognize a person, confirm an object exists, or file a rough copy for the record, a faxed photo is usually good enough, especially in fine or photo mode. If they need exact detail, colour, or a legally reliable copy, fax is the wrong tool, and an emailed file, a secure upload, or a mailed print serves better. Saying so in a cover note helps: tell the recipient that the faxed image is a reference copy and that the original follows by another route, so they do not judge the original by the fax.
When you do fax, send a test page first if the image matters and time allows. Fax the photo to a number you control, or ask the recipient to confirm what arrived before you send the full set. A test costs one extra send and saves the embarrassment of a recipient working from a black rectangle where a photo should have been.
LetterAgent fax is currently available in testing, so it is described that way here, not promised for any specific send. You ask your AI assistant, approve the exact quoted total after the page count is verified, and pay once through Stripe. Fax numbers cover the United States and Canada only, and there is no inbound fax. For photos, the same limits apply as with any fax: black-and-white, coarse compared with the original, and best in fine or photo mode. If exact image detail matters, a mailed letter with a printed image, sent through LetterAgent's letter flow, may preserve it better than a fax.
Ready to fax it? Fax with LetterAgent: describe it to your AI assistant, approve the exact quoted price, and it is sent.
LetterAgent is a working name. Prices include print, postage, and our service fee. US prices in USD, Canadian prices in CAD (Canadian prices exclude applicable sales tax, added at checkout). Currently in private testing.
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