BMP is an uncompressed Windows bitmap format that produces very large files. PNG is a lossless format that preserves transparency and sharp edges. Whenever a folder of BMP files needs to move into a workflow, platform, or tool built around PNG, converting each file by hand doesn't scale past a handful of images.
Turbo Batch Image Converter Lite batch converts an entire folder of BMP files to PNG in one pass, including nested sub-folders, all processed offline on your own Windows PC with no upload limits.
















- Install Turbo Batch Image Converter Lite on your Windows PC.
- Open the app and select Batch Mode for a folder, or Single Mode for one file.
- Drag your BMP files or folder into the app window, enabling recursive scanning if needed.
- Set the "From" format to BMP and the "To" format to PNG.
- PNG is lossless, so no quality tradeoff is needed, just confirm your output folder.
- Click Convert. Your PNG files are written to your output folder, fully offline.
- Converts an entire folder of BMP files to PNG in one batch
- Recursive sub-folder scanning for nested image libraries
- Lossless PNG output with transparency support
- Runs fully offline, so your images never leave your PC
- Multi-core engine scales up to 32 parallel workers
Does converting BMP to PNG affect my original files?
No, the converter reads your BMP files and writes new PNG files to your chosen output folder, leaving the originals untouched.
Can I convert an entire folder of BMP files to PNG at once?
Yes, Batch Mode processes an entire folder in one pass, including nested sub-folders if recursive scanning is enabled.
Will converting to PNG change my image quality?
PNG is a lossless format, so no additional quality is lost during conversion.
Ready to batch convert your BMP files to PNG, fully offline and for free?