Sigma RAW Converter

Convert Sigma RAW files online for free.

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How to Convert a Sigma RAW file?

Click the “Choose Files” button to select your Sigma RAW files.
Then select a target format and click the "Convert" button
Once the conversion finishes, click the "Download" button to save the file.

Convert Any File

FreeConvert supports 500+ file formats. Simply upload your Sigma RAW files and select a popular file format to convert them to. Easily share your Sigma RAW files (in a widely supported format) after conversion.

Best Quality

We use both open-source and custom software to make sure our conversions are of the highest quality. In most cases, you can fine-tune conversion parameters using “Advanced Settings” (optional).

Free & Secure

Our Sigma RAW converter is free and works on any web browser. We guarantee file security and privacy. Files are protected with 256-bit SSL encryption and automatically deleted after 8 hours.

What is a Sigma RAW (X3F) file?

Sigma RAW is the raw image format written by Sigma’s SD and dp cameras, saved with the .x3f extension. Its distinguishing feature is the Foveon X3 sensor behind it, which captures red, green, and blue at every pixel instead of interpolating colour from neighbouring photosites. The result is a raw file with remarkable per-pixel detail, though the trade-off is large file sizes and a narrower choice of compatible software.

How to open a Sigma RAW file?

Use Sigma’s own SIGMA Photo Pro. It is purpose-built for Foveon data and produces noticeably better colour and detail than generic raw converters.

Some third-party developers, including Adobe Lightroom, RawTherapee, and XnView MP, can open Sigma RAW files, but support depends on the camera model. Developing in SIGMA Photo Pro and exporting a 16-bit TIFF is the most reliable route into other editors. You can also convert the file with our X3F to JPG tool.

Developed by: Sigma Corporation

Initial Release: 2002

Convert Sigma RAW to other file types

Freeconvert.me can convert your Sigma RAW files to these other formats:

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