Convert FAX to OTB

Convert your FAX files to OTB format for free. Drag and drop your file or click to select it.

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Source format(.fax, .g3…)

Target format(.jpg)

Accepted files :.fax.g3.g4

Drop your files here

or click to select

Max 25 MB · FAX only

Why convert FAX to OTB?

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 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

About the OTB format

OTB — On-the-air Bitmap (Nokia)

OTB is a monochrome bitmap format originally used by Nokia feature phones for sending and receiving images over SMS (picture messages). It was a standard format in early mobile phones of the late 1990s and 2000s for simple graphics like logos and ringtone icons.

Common uses

Nokia mobile phone picture message images
Converting legacy feature phone graphics
Historical mobile messaging image recovery
Early mobile logo and icon conversion

Related conversions

Other conversions available for FAX and OTB files

OTB to FAXReverse conversion FAX to PNGFrom FAX too PNG to OTBTo OTB too FAX to TXTFrom FAX too TXT to OTBTo OTB too FAX to JPGFrom FAX too JPG to OTBTo OTB too FAX to CSVFrom FAX too

See all FAX conversions

Frequently asked questions

How do I convert FAX to OTB?

Upload your FAX file above, choose OTB as the output format, then click Convert. Your OTB file is ready to download in seconds — nothing to install, and it works in your browser.

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.

Remove ads and get unlimited conversions by creating a free account.