HotConvertDrop your files here
or click to select
Why convert X3F to FAX?
Fast
Your file is converted in under 30 seconds in our cloud.
Secure
Files are automatically deleted after 1 hour.
Quality preserved
Maximum quality preserved during conversion.
About the X3F format
RAW — Sigma X3F RAW
X3F is Sigma's proprietary RAW format used in cameras equipped with the Foveon X3 sensor. Unlike conventional Bayer sensors, the Foveon captures red, green, and blue data at every pixel location, producing unique color rendering and sharpness.
Common uses
- Sigma camera photography with Foveon sensor
- Studio and still-life photography
- Architecture and detail-oriented photography
- Color-critical professional workflows
About the FAX format
FAX — Group 3/4 Fax Image
FAX is a generic extension used for raw CCITT Group 3 or Group 4 fax image data files. These files contain compressed monochrome page scans as transmitted by fax machines, and are typically converted to TIFF or PDF for archival and viewing.
Common uses
- Fax document archiving and recovery
- Converting raw fax streams to viewable formats
- Legal and business fax record keeping
- Processing fax server received files
Related conversions
Other conversions available for X3F and FAX files
Frequently asked questions
Is the conversion free?
Yes, basic conversion is completely free. For large volumes, check out our paid plans.
What is the maximum file size?
Free accounts can convert files up to 25 MB. Pro accounts up to 100 MB.
How long are my files kept?
Files are automatically deleted after 1 hour on the free plan, 24 hours on Pro.
What formats are supported?
We support over 200 source and target formats. See our complete formats page.