HEIF to FAX — Format Comparison & Online Converter
Fast, instant HEIF to FAX conversion. No signup required. Just drop your .heif file and get .fax in seconds.
Batch Settings
About HEIF to FAX Conversion
HEIF (introduced 2015) and FAX are both image formats, but they differ in important ways. HEIF stores images using highly efficient HEVC compression, commonly used on Apple devices. FAX is a widely used file format.
When you convert HEIF to FAX, the goal is to convert between formats quickly. Converting HEIF to FAX maintains high quality with CocoConvert's optimised encoder settings. Understanding these technical differences helps you choose the right format for your workflow.
Your HEIF file is decoded and re-encoded as FAX. The conversion involves 4 steps: (1) your heif file is uploaded and validated, (2) the file is decoded (parsed into its raw data), (3) the data is re-encoded in fax format, (4) the converted file is ready for download.
CocoConvert's converter handles the entire pipeline server-side using FFmpeg, Sharp, and qpdf — battle-tested libraries used by streaming platforms and enterprise tools. Files are encrypted in transit and deleted within 24 hours.
This conversion is ideal when you When you need a FAX file. For the opposite direction, CocoConvert also supports FAX to HEIF conversion.
How to Convert HEIF to FAX
- 1
Upload .heif file
Select your HEIF file by dragging it to the upload zone or using the file picker. Batch upload is available for multiple files.
- 2
Choose .fax
Set FAX as the output format. The converter uses optimal settings based on the HEIF→FAX conversion profile.
- 3
Convert
The server-side engine decodes your HEIF file and re-encodes it as FAX. Processing time depends on file size and complexity.
- 4
Download result
Grab your converted .fax file. Multiple output files can be downloaded together.
What Happens When You Convert HEIF to FAX
Your HEIF file is decoded and re-encoded as FAX.
Your HEIF file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in FAX format
The converted file is ready for download
Format Comparison
HEIF
.heif file
| Extension | .heif |
| MIME Type | image/heif |
| Category | Image |
FAX
.fax file
| Extension | .fax |
| MIME Type | image/g3fax |
| Category | Image |
Should You Convert HEIF to FAX?
When to Convert
- ✓When you need a FAX file
Frequently Asked Questions
What is the difference between HEIF and FAX?
HEIF stores images using highly efficient HEVC compression, commonly used on Apple devices. FAX is a widely used file format.
Does HEIF to FAX conversion affect quality?
Converting HEIF to FAX maintains high quality with CocoConvert's optimised encoder settings.
Which format has better compression, HEIF or FAX?
HEIF uses lossy compression. FAX is widely supported. The better choice depends on whether you prioritize file size or quality.
How long does HEIF to FAX conversion take?
Most conversions finish in seconds. Larger files or complex image content may take 10–30 seconds. CocoConvert processes files in parallel for batch jobs.
Is HEIF or FAX better for long-term storage?
Both formats use lossy compression, so consider keeping your original source file for long-term storage.
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