About this conversion
BMP files are uncompressed and often unnecessarily large. Converting to PNG applies lossless compression, typically shrinking the file substantially with zero quality loss. Converting iPhone photos instead? Use the HEIC batch converter — it keeps original filenames.
Frequently asked questions
Will I lose any quality?
No -- PNG compression is lossless, so every pixel is preserved exactly.
How much smaller will the file be?
Often dramatically smaller, especially for images with flat colors or repeated patterns -- BMP’s lack of compression makes it very inefficient by comparison.
Is this safe for old scanned documents or screenshots saved as BMP?
Yes, this is a common and ideal use case for this exact conversion.
Looking for an HEIC batch converter that preserves filenames?
This page is BMP to PNG. For iPhone HEIC photos, use the HEIC batch converter — the ZIP keeps original filenames.