BMP vs QOI: Which Should You Use?
Side-by-side comparison of BMP and QOI image formats — features, pros, cons, and conversion options.
BMP is best for Simple uncompressed images in Windows applications. QOI is best for Real-time applications requiring fast lossless image encoding.
Quick Verdict
- ✓ Simple uncompressed format
- ✓ No quality loss
- ✓ Universal Windows support
- ✗ Extremely large file size
- ✓ Extremely fast encode/decode
- ✓ Lossless compression
- ✓ Simple specification
- ✗ Lower compression than PNG
Specs Comparison
Side-by-side technical comparison of BMP and QOI
| Feature | BMP | QOI |
|---|---|---|
| Category | Image | Image |
| Year Introduced | 1986 | 2021 |
| MIME Type | image/bmp | image/qoi |
| Extensions | .bmp | .qoi |
| Animation | ✗ | ✗ |
| Hdr | ✗ | ✗ |
| Lossless | ✓ | ✓ |
| Lossy | ✗ | ✗ |
| Max Color Depth | 32-bit | 8-bit |
| Transparency | ✗ | ✓ |
Pros & Cons
BMP
- ✓ Simple uncompressed format
- ✓ No quality loss
- ✓ Universal Windows support
- ✗ Extremely large file size
- ✗ No transparency
- ✗ No compression
QOI
- ✓ Extremely fast encode/decode
- ✓ Lossless compression
- ✓ Simple specification
- ✗ Lower compression than PNG
- ✗ Very limited adoption
- ✗ No advanced features
When to Use Each
Choose BMP when...
- You need files optimized for Simple uncompressed images in Windows applications
- Simple uncompressed format
- No quality loss
- You need lossless quality
Choose QOI when...
- You need files optimized for Real-time applications requiring fast lossless image encoding
- Extremely fast encode/decode
- Lossless compression
- You need lossless quality
How to Convert
Convert between BMP and QOI for free on ChangeThisFile
Frequently Asked Questions
BMP is best for Simple uncompressed images in Windows applications, while QOI is best for Real-time applications requiring fast lossless image encoding. Both are image formats but they differ in compression, compatibility, and intended use cases.
It depends on your use case. BMP is better for Simple uncompressed images in Windows applications. QOI is better for Real-time applications requiring fast lossless image encoding. Consider your specific requirements when choosing between them.
Go to the BMP to QOI converter on ChangeThisFile. The conversion runs entirely in your browser — your file never leaves your device. It's free with no signup required.
Yes. ChangeThisFile supports QOI to BMP conversion. The conversion runs in your browser with no upload required.
File size depends on the content and compression settings. BMP preserves full quality. QOI preserves full quality. For the smallest files, choose the format with lossy compression that meets your quality needs.
No, BMP does not support transparency, whereas QOI does. This may be an important factor depending on your use case.
Both BMP and QOI are supported file formats that are free to use. You can convert between them for free on ChangeThisFile — browser-based conversions have no limits and your files never leave your device.
QOI is newer — it was introduced in 2021, while BMP dates back to 1986. Newer formats often offer better compression and features, but older formats tend to have wider compatibility.
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