How to Convert BMP to PNG

BMP and PNG can both store image data without lossy compression, but they do it very differently — BMP stores pixel data in a raw, uncompressed grid, while PNG applies genuine lossless compression that shrinks the file without losing any detail. Converting BMP to PNG typically reduces file size meaningfully while keeping the image exactly as it was, and unlike converting to JPG, you don't trade away any lossless quality to get there.

PNG also adds a full alpha channel for transparency, which standard BMP doesn't support, making PNG the better choice if you need to add or preserve a transparent background as part of your workflow after conversion.

1. Install Turbo Batch Image Converter Pro on your Windows PC.
2. Open the app and select Batch Mode for multiple files, or Individual Mode for a single BMP.
3. Drag your BMP file or folder into the app window, enabling recursive folder scanning if needed.
4. Set the "From" format to BMP and the "To" format to PNG.
5. Click Convert. PNG files are written to the output folder, fully offline.

• 100% offline — your images are never uploaded anywhere
• Bulk conversion of entire folders, including sub-folders, in one click
• Lossless compression shrinks file size with no quality loss
• Multi-core processing for fast handling of large batches
• Option to delete original BMP files automatically after conversion
• No recurring subscription or hidden upload limits

If you only need straightforward format conversion without RAW or HEIC support, Turbo Batch Image Converter Lite covers this exact BMP-to-PNG conversion in a lighter, more focused app.