OTB is a bitmap format for mobile devices, used for operator logos and graphics sent via SMS.
XBM is a monochrome image format for X Window System using C source code.
FreeFileConvert uses tuned encoding for OTB to XBM conversions, preserving clarity while trimming file size. Finished audio streams instantly across phones, tablets, desktops, and modern browsers without extra tweaks.
Upload OTB files from desktop, tablet, or cloud storage, queue multiple jobs, and let the converter finish autonomously. Return whenever convenient to download synchronized XBM results on any device you rely on.
Process up to 5 files sized 1000 MB per batch without splitting queues manually. Mixed-format uploads convert together, producing consistent XBM audio with dependable progress tracking.
OTB images are small monochrome bitmaps optimized for mobile transmission.
XBM files are valid C code defining a static array of bitmap data.
Upload your image file in the OTB format from your device, Dropbox, or Google Drive.
Select XBM 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.