PBM (Portable Bitmap) is a simple black-and-white image format from the Netpbm family.
FAX format stores scanned or transmitted fax documents, typically as black-and-white TIFF with CCITT compression.
FreeFileConvert uses tuned encoding for PBM to FAX conversions, preserving clarity while trimming file size. Finished audio streams instantly across phones, tablets, desktops, and modern browsers without extra tweaks.
Upload PBM files from desktop, tablet, or cloud storage, queue multiple jobs, and let the converter finish autonomously. Return whenever convenient to download synchronized FAX 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 FAX audio with dependable progress tracking.
PBM files use ASCII or binary format with 1-bit color (black and white only).
Fax images use Group 3 or Group 4 compression optimized for black-and-white document transmission.
Upload your image file in the PBM format from your device, Dropbox, or Google Drive.
Select FAX 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.