If you took a document photo on an iPhone, there is a good chance the file is HEIC or HEIF. That can be annoying when a website only accepts PDF or JPG.
Onetime Fax now accepts HEIC and HEIF uploads directly, so you can fax iPhone photos without manually converting them first.
For more phone-specific tips, see How to Send a Fax from Your Phone.
HEIC is an image format used by iPhones and other Apple devices. It is part of Apple’s High Efficiency photo setting.
The main benefit is smaller file size with good image quality. The drawback is compatibility: some older websites and document tools do not accept HEIC files.
That is why many people search for a HEIC-to-PDF or HEIC-to-JPG converter before faxing. With Onetime Fax, that extra step is not required.
Behind the scenes, the uploaded HEIC image is converted into a fax-ready document. You do not need to manage that conversion yourself.
The practical result is simple:
The recipient receives a normal fax. They do not need to know the original file was HEIC.
Before you upload, make the photo as readable as possible:
If the document has several pages, consider using the iPhone Notes scanner or Files app to create a PDF. That can make page order easier to manage.
HEIC is fine for a single clear photo. PDF is better when:
If you already have a HEIC file, upload it directly. If you are starting from paper and have several pages, scanning to PDF may be cleaner.
Make sure the file extension is .heic or .heif. Some apps export iPhone photos as other formats.
Rotate the photo in the Photos app before uploading.
Retake the photo with better lighting and less background. Faxing works best with dark text on a light page.
HEIC files are usually compact, but very large photos can still take time to upload. Try using Wi-Fi or scan the document as a PDF.
You can fax HEIC and HEIF photos from your iPhone without converting them first. Upload the file directly, check that it processed, and send.
Yes. Onetime Fax accepts HEIC and HEIF image uploads and prepares them for faxing.
HEIC is the image format many iPhones use by default for photos. It stores high-quality images in smaller files than JPG.
No. With Onetime Fax, you can upload the HEIC file directly.
Apple uses HEIC for its High Efficiency image setting because it saves storage while keeping good image quality.