Batch convert PNG images to Windows BMP bitmap format with custom bit depth, quality and transparency handling. Free, no signup. Need the reverse direction? Try our BMP to PNG converter, or explore PNG to JPG, PNG to WebP and Compress PNG for related tasks.
png-to-bmp.zip archive with a README inside.Need to go the other way? Use our BMP to PNG converter. For other PNG workflows, see PNG to ICO (at our homepage), PNG to PDF, PNG Analyzer or browse the full Image Converters collection.
Choose PNG when file size and web use matter. Choose BMP when working with software that needs raw, uncompressed pixel data, or when targeting legacy Windows applications. For other comparisons, see our Compression Analyzer.
Bit depth controls how many colors each pixel can represent. Higher bit depth means richer color and larger file size. Pick the lowest depth that still looks right for your use case.
Full color plus transparency. The only depth that preserves PNG transparency in a BMP. Largest files.
16.7 million colors, no alpha. The standard choice for photos and most BMP exports. Recommended for general use.
65,536 colors. Good balance between quality and file size. Some color banding may appear on gradients.
Indexed color or grayscale. Excellent for screenshots, simple graphics and UI icons. Supports RLE compression.
Very small files. Ideal for old-school graphics, low-color logos and simple icons. Supports RLE.
Smallest possible BMP. Best for line art, faxes, OCR input and silhouettes. No grayscale - pure black or white.
Convert multiple PNG files at once. 3+ files are bundled into a single ZIP archive automatically.
Full control: 1, 4, 8, 16, 24 and 32-bit output to match exactly what your target software needs.
Keep the alpha channel in 32-bit, or flatten transparency over white, black or a custom color.
Scale to a percentage or cap to a maximum width during conversion - no second tool needed.
Strip EXIF and metadata by default. Files auto-delete from the server after a few hours.
Optional Run-Length Encoding for 4 and 8-bit BMP - smaller files where it matters.
100% free, no signup, no email, no watermark. Works entirely in your browser session.
Comfortable to use day or night - light mode by default, dark mode one toggle away.
BMP remains the format of choice for several niche but important workflows:
If you also need to compress or analyze the resulting BMP, check out Compress BMP or browse all BMP Converters.
PNG uses lossless compression to create smaller files and supports transparency through an alpha channel. BMP stores uncompressed pixel data, resulting in larger files but maximum quality and broad compatibility with Windows software, image editors and embedded display systems. See our Compression Analyzer to compare formats side by side.
Use 24-bit for standard color images (most common choice), 32-bit if you need to preserve transparency, 8-bit for grayscale or simple palette graphics, 16-bit for a balance of size and quality, and 1-bit or 4-bit for monochrome line art or icons.
Only 32-bit BMP supports an alpha channel. For 24-bit and lower depths, you can flatten transparent pixels onto a white, black or custom background color using the Transparency Handling dropdown. The tool detects transparency in your PNG and suggests the best option automatically.
BMP is essentially uncompressed and stores every pixel directly, while PNG uses lossless compression to shrink file size. The larger BMP is expected. To reduce size, choose a lower bit depth, enable RLE for 4 or 8-bit, or run the result through our Compress BMP tool afterwards.
Yes. Drop multiple PNGs onto the upload area or pick them through the file picker. When you convert 3 or more files at once, the results are bundled into a single png-to-bmp.zip archive with a README inside. For just 1 or 2 files, you get them individually.
Each input PNG can be up to 50MB. There is no hard cap on the number of files per batch beyond the overall upload size. Output BMPs may be significantly larger because BMP is uncompressed - drop the bit depth or use the optional resize for smaller results.
Yes. BMP is well supported on macOS Preview, GIMP, ImageMagick, Photoshop and most image viewers and editors across Windows, macOS and Linux. The format is also widely used by older industrial, scientific and embedded software.
Yes. Files are processed on our server and then automatically deleted within a few hours. We never view your files, share them, or use them for training. By default we also strip EXIF and embedded metadata from your BMP output for extra privacy.
Absolutely - use our BMP to PNG converter for the reverse direction. You can also convert BMP to other formats with BMP to JPG, BMP to WebP or browse all BMP Converters.