Convert x3f to avif

  1. Download and install the latest version of Filestar.

  2. Right click on one or more X3f file(s) on your desktop and select Convert with Filestar.

  3. Type convert to avif in the search box.

  4. Press Convert.

Or let an AI agent do it: filestarcli -i file.x3f -c "convert to avif" (how).

Let your AI agent convert X3F 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

Then ask your agent:

“Convert the X3F files in my Downloads folder to AVIF”

Or run it yourself:

filestarcli -i file.x3f -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 X3F to AVIF?

Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.x3f -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 .x3f and .avif?

Extension
.x3f
.avif
Format
Binary
Binary
Category
Camera
Raster Image
Developer
SIGMA
AOMedia
Description
The X3F file format, also known as the SIGMA X3F Camera RAW File, is a proprietary image format developed by Sigma Corporation for storing raw image data captured by Sigma cameras equipped with the Foveon X3 sensor. Unlike standard JPEGs or TIFFs, X3F files contain unprocessed data from the camera's sensor, offering photographers greater flexibility in image editing.
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
image/x-sigma-x3f
image/avif

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