MNG is an animation extension of PNG, supporting multiple frames with timing and transition effects.
OTB is a bitmap format for mobile devices, used for operator logos and graphics sent via SMS.
FreeFileConvert uses tuned encoding for MNG to OTB conversions, preserving clarity while trimming file size. Finished audio streams instantly across phones, tablets, desktops, and modern browsers without extra tweaks.
Upload MNG files from desktop, tablet, or cloud storage, queue multiple jobs, and let the converter finish autonomously. Return whenever convenient to download synchronized OTB 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 OTB audio with dependable progress tracking.
MNG files contain multiple PNG or JNG images with animation control chunks.
OTB images are small monochrome bitmaps optimized for mobile transmission.
Upload your image file in the MNG format from your device, Dropbox, or Google Drive.
Select OTB 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.