X3F is the RAW image format used by Sigma cameras with Foveon X3 sensors.
YUV is a raw video format storing luminance and chrominance separately.
FreeFileConvert uses tuned encoding for X3F to YUV conversions, preserving clarity while trimming file size. Finished images open instantly across phones, tablets, desktops, and modern browsers without extra tweaks.
Upload X3F files from desktop or tablet, queue multiple jobs, and let the converter finish autonomously. Return whenever convenient to download synchronized YUV results on any device you rely on.
Process up to 5 files sized 1024 MB per batch without splitting queues manually. Mixed-format uploads convert together, producing consistent YUV images with dependable progress tracking.
X3F files contain three-layer sensor data from Sigma Foveon sensors.
YUV files contain uncompressed video frames in Y, U, V color space.
Upload your image file in the X3F format from your device.
Select YUV as the output format and click Convert. Adjust optional settings if needed.
Download the converted image file. Each file stays available for up to 5 downloads.