XWD (X Window Dump) is an image format for X Window System screen captures.
FITS (Flexible Image Transport System) is a standard format for astronomical data.
FreeFileConvert uses tuned encoding for XWD to FTS conversions, preserving clarity while trimming file size. Finished images open instantly across phones, tablets, desktops, and modern browsers without extra tweaks.
Upload XWD files from desktop or tablet, queue multiple jobs, and let the converter finish autonomously. Return whenever convenient to download synchronized FTS 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 FTS images with dependable progress tracking.
XWD files contain raw pixel data with X11 window attributes.
FITS files can contain multi-dimensional data, tables, and extensive metadata headers.
Upload your image file in the XWD format from your device.
Select FTS 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.