PNG to BMP — Format Comparison & Online Converter
Fast, instant PNG to BMP conversion. No signup required. Just drop your .png file and get .bmp in seconds.
Batch Settings
Transparency will be lost
PNG supports transparency, but BMP does not. Transparent areas will be filled with a solid color (typically white). If you need transparency, consider converting to PNG or WebP instead.
Some metadata may not survive
Your PNG file may contain tEXt, iTXt, ICC metadata. BMP has limited or no support for these metadata types. Location data (GPS), camera settings, and color profiles may be stripped during conversion.
Color depth reduction: 48-bit → 32-bit
PNG stores up to 48 bits per channel, but BMP supports only 32 bits. You may notice banding in smooth gradients (like sky or skin tones) where subtle color transitions are lost.
在处理图片文件时，有时我们需要将PNG格式转换为BMP。PNG以其无损压缩和支持透明背景的特性，在网页设计和日常分享中广受欢迎。然而，在某些特定场景下，比如对图像质量有极致要求、需要兼容老旧系统或特定专业软件时，未压缩的BMP格式就显得尤为重要。BMP文件直接存储图像像素信息，虽然文件体积较大，但它能确保图像的每一个细节都得到最原始的保留，避免了压缩带来的任何潜在失真。我们的在线转换工具，旨在帮助您轻松、高效地完成PNG到BMP的转换，无论是追求极致画质，还是为了满足特定设备或软件的需求，都能迎刃而解，让您的图片处理更加得心应手。
- 微信表情包制作与分享
- 游戏开发素材导入
- 工业设计软件兼容
在华语地区，尤其是游戏和专业设计领域，BMP因其无损特性，在素材交换和旧版软件兼容方面仍有一定应用。同时，部分早期移动设备和特定行业系统对BMP的支持度也高于其他格式。
About PNG to BMP Conversion
PNG (introduced 1996) and BMP (introduced 1986) are both image formats, but they differ in important ways. PNG uses lossless compression and supports transparency, making it perfect for graphics, logos, and screenshots. BMP is an uncompressed raster format that preserves every pixel but produces very large files.
Full Name: PNG uses Portable Network Graphics, while BMP uses Bitmap Image. Compression: PNG uses Lossless, while BMP uses None (uncompressed). Transparency: PNG uses Yes, while BMP uses No.
When you convert PNG to BMP, the goal is to convert between formats quickly. PNG supports transparency, but BMP does not. Transparent areas will be filled with a solid color (typically white). If you need transparency, consider converting to PNG or WebP instead. Understanding these technical differences helps you choose the right format for your workflow.
Your PNG file is decoded and re-encoded as BMP. The conversion involves 4 steps: (1) your png file is uploaded and the format is validated, (2) the file content is decoded into its raw representation, (3) the data is re-encoded in bmp format with optimal settings, (4) the converted file is ready for download.
CocoConvert's converter handles the entire pipeline server-side using FFmpeg, Sharp, and qpdf — battle-tested libraries used by streaming platforms and enterprise tools. Files are encrypted in transit and deleted within 24 hours.
This conversion is ideal when you You need maximum device and software compatibility. For the opposite direction, CocoConvert also supports BMP to PNG conversion.
How to Convert PNG to BMP
- 1
Upload .png file
Select your PNG file by dragging it to the upload zone or using the file picker. Batch upload is available for multiple files.
- 2
Choose .bmp
Set BMP as the output format. The converter uses optimal settings based on the PNG→BMP conversion profile.
- 3
Convert
The server-side engine decodes your PNG file and re-encodes it as BMP. Processing time depends on file size and complexity.
- 4
Download result
Grab your converted .bmp file. Multiple output files can be downloaded together.
What Happens When You Convert PNG to BMP
Your PNG image is decoded into raw pixel data, then re-encoded as BMP. No quality loss — pixel data is preserved exactly.
Your PNG file is decoded — the compressed/stored pixel data is expanded into raw RGBA (with alpha channel) pixels
Transparency is resolved: transparent pixels are composited onto a white background
Pixels are re-encoded using no compression (raw pixel storage)
Metadata (EXIF, ICC profiles) is transferred where BMP supports it
The BMP file is saved and ready for download
PNG vs BMP — Detailed Comparison
| Feature | .PNG | .BMP |
|---|---|---|
| Full Name | Portable Network Graphics | Bitmap Image |
| Compression | Lossless | None (uncompressed) |
| Transparency | Yes | No |
| Animation | No | No |
| Color Depth | 8 or 16 bits/channel (up to 48-bit color) | up to 32 bits/channel |
| HDR Support | No | No |
| Typical File Size | 5–20 MB per photo, <1 MB for graphics | 10–50 MB per photo (uncompressed) |
| Platform Support | Universal | Universal |
| Browser Support | Universal | Limited |
| Year Created | 1996 | 1986 |
| Open Standard | Yes | No |
Should You Convert PNG to BMP?
When to Convert
- ✓You need maximum device and software compatibility
When NOT to Convert
- ✗You need to preserve transparent areas — BMP doesn't support transparency
Consider alternatives:
Common Mistakes When Converting PNG to BMP
"My file's transparent background will carry over to BMP"
BMP doesn't support transparency. Transparent areas become solid (usually white). Save as PNG or WebP if you need transparency.
"BMP will be smaller than my PNG file"
BMP uses no compression, so the output file is often larger than a lossy PNG. If you need a small file, BMP may not be the right choice.
Frequently Asked Questions
What is the difference between PNG and BMP?
PNG uses lossless compression and supports transparency, making it perfect for graphics, logos, and screenshots. BMP is an uncompressed raster format that preserves every pixel but produces very large files. Full Name: PNG uses Portable Network Graphics, while BMP uses Bitmap Image. Compression: PNG uses Lossless, while BMP uses None (uncompressed). Transparency: PNG uses Yes, while BMP uses No.
Does PNG to BMP conversion affect quality?
PNG supports transparency, but BMP does not. Transparent areas will be filled with a solid color (typically white). If you need transparency, consider converting to PNG or WebP instead.
Which format has better compression, PNG or BMP?
PNG uses lossless compression. BMP uses none compression. The better choice depends on whether you prioritize file size or quality.
How long does PNG to BMP conversion take?
Most conversions finish in seconds. Larger files or complex image content may take 10–30 seconds. CocoConvert processes files in parallel for batch jobs.
Is PNG or BMP better for long-term storage?
BMP is better for archival since it preserves all original data.
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