Convert fax to avif

Download and install the latest version of Filestar.
Right click on one or more Fax file(s) on your desktop and select Convert with Filestar.
Type convert to avif in the search box.
Press Convert.

Or let an AI agent do it: filestarcli -i file.fax -c "convert to avif" (how).

Let your AI agent convert FAX to AVIF

Claude Code, Codex, Cursor and other agents can do this on your computer with Filestar. Your files stay on your machine.

Install Filestar and add it to your agents:

npm install -g filestar
filestarcli agent install

Or add it in one click:

Claude Code:

claude mcp add filestar -- npx -y [email protected] mcp

Then ask your agent:

“Convert the FAX files in my Downloads folder to AVIF”

Or run it yourself:

filestarcli -i file.fax -c "convert to avif"

Runs on your computer, so your files stay on it. Works on Windows, macOS and Linux. 50 free conversions with the npm install, no account needed.

Can my AI agent convert FAX to AVIF?

Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.fax -c "convert to avif" on your computer, so your files stay on it.

Using Filestar With AI Agents → · Download SKILL.md

What is the difference between .fax and .avif?

Name: Group 3 FAX; AV1 Image File Format
Extension: .fax; .avif
Format: Binary; Binary
Category: Fax; Raster Image
Developer: ITU-T; AOMedia
Description: This format is used to compress TIFF images when sending them via fax machines. This format helps reduce the data transmission time. Group 3 eliminates redundant data during compression in order to reduce file size. The standard 10:1 compression ratio may be increased to the user's preferences, but it can lead to a significant loss of image quality.; It is an image compression codec file with the same quality as .jpeg, but that is ten smaller. It supports HDR (High Dynamic Range). SDR (Standard Dynamic Range), and WCG (Wide Color Gamut) images. Also, it contains both the image sequences and image items. The only pitfall is that a few applications support it.
MIME Type: application/vnd.fax; image/avif
Sample: sample.avif
Wikipedia: .avif on Wikipedia

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