Convert PNG images to uncompressed BMP for Windows apps, legacy software, and raw pixel workflows
Drop PNG files here
or browse files
Up to 10 files · 50 MB each
Click "Upload PNG" or drag files onto the upload area. Select multiple files at once for batch conversion.
Files are converted to BMP right away. Single files are typically ready in a couple of seconds. BMP output files will be significantly larger than the source PNGs — this is expected.
Click "Download BMP" to save your file. Batch conversions can be downloaded as a ZIP archive. No signup or email needed.
BMP stores pixel data without compression, giving you a direct pixel-accurate representation of the source image. No compression artifacts, no encoding trade-offs.
Every Windows application that handles images can open BMP files — including legacy tools that predate support for PNG or other modern formats.
BMP's straightforward format is easy to read and write in code without external libraries. Useful in embedded systems, low-level image processing, and environments where format simplicity matters more than file size.
Convert up to 10 PNG files to BMP in one session — useful for preparing a set of assets for a game engine, legacy system, or processing pipeline.
Completely free to use. No watermarks, no conversion limits, no account required.
Files are deleted immediately after conversion. We never store, view, or share your images.
Some older Windows applications, embedded systems, and legacy tools only accept BMP files. If you're feeding images into one of these systems and your source files are PNG, converting to BMP is the fastest path. It's a niche requirement today, but when a specific tool demands BMP, this converter handles it.
Certain game engines, level editors, and graphics toolchains — particularly older ones — use BMP as their native texture format. Converting PNG assets to BMP gets them into the pipeline without requiring engine-side conversion or custom import scripts.
Some image processing pipelines, hardware interfaces, and embedded systems work directly with raw pixel buffers. BMP's uncompressed format stores data in a simple, well-documented structure that's easy to read without a complex decoder — useful in low-level programming and hardware contexts where parsing PNG's compression would add unnecessary overhead.
No software to install. Works directly in your browser on any device.
Convert up to 10 PNG files to BMP in a single session. Files are processed in parallel and downloadable individually or as a ZIP.
Supports PNG source files up to 50 MB. BMP output files will be considerably larger — plan storage accordingly.
The converter produces clean BMP output without introducing additional compression steps. Pixel data from the source PNG is preserved exactly.
All uploads use HTTPS encryption. Files are permanently deleted from servers after conversion. GDPR compliant.
Works on all modern mobile browsers. No app download needed.
PNG and BMP are both lossless formats, but they handle storage very differently. PNG uses efficient lossless compression to keep files compact. BMP stores pixels with no compression at all, resulting in much larger files but a simpler structure that's easier to work with in low-level programming contexts.
| Aspect | PNG | BMP |
|---|---|---|
| Compression | Lossless (Deflate) | None (uncompressed by default) |
| Transparency | Yes (full alpha channel) | No |
| Animation | No | No |
| Typical File Size | Medium to large (200 KB – 20 MB) | Very large (1 MB – 100+ MB) |
| Color Depth | 24-bit (RGB) or 32-bit (RGBA with alpha) | Up to 32-bit |
| Best For | Web graphics, logos, UI assets, screen use | Windows legacy apps, game assets, embedded systems |
| Browser Support | All browsers | Limited — most browsers don't display BMP natively |
Convert PNG to BMP when a specific application, pipeline, or legacy system requires BMP input. Note that transparency is not supported in BMP — any transparent areas in your PNG will be replaced with a solid background color. For general use, PNG is a better choice in almost every scenario.
PNG to BMP is a specialized conversion for specific workflows. Both formats are lossless, so you're not converting for quality reasons — you're converting because a particular application, game engine, or legacy system requires BMP input. The trade-off is significant: BMP files are much larger than PNG because they store pixel data without any compression. Understanding when that trade-off is worth making is the key to using this converter effectively.
The most common reason is legacy software compatibility. Older Windows applications — particularly in industrial, medical, and enterprise contexts — sometimes only accept BMP. These tools predate broad PNG support and were never updated. Converting your PNG assets to BMP is faster than trying to patch or replace the software.
Game development is another valid use case. Some game engines and level editors, especially older DirectX-based tools, use BMP as their native texture format. If your asset pipeline expects BMP, you need BMP — and converting from PNG is straightforward.
Finally, there's low-level image processing. BMP's simple, well-documented structure makes it easy to read directly in code without external libraries. For embedded systems, hardware interfaces, or custom computer vision tools that work with raw pixel buffers, BMP's lack of compression is actually an advantage.
**Both are lossless.** Unlike converting PNG to JPG, converting PNG to BMP doesn't introduce quality loss from compression. The conversion is about format structure and application compatibility, not image quality.
**Transparency:** PNG supports full alpha channel transparency. BMP doesn't — transparent areas become solid (white by default). Check your image before converting: if transparency matters, BMP is the wrong destination.
**File size:** PNG uses efficient lossless compression. BMP stores raw pixel data with no compression by default. A 500 KB PNG can become a 5–20 MB BMP easily. Make sure you have adequate storage and that your target system can handle the larger files.
**Browser support:** BMP is not supported in web browsers. It's a format for Windows desktop applications and specialized tools, not for web delivery.
**Check for transparency first.** If your PNG has transparent areas, they'll be filled with solid white in the BMP output. If that's not acceptable, BMP isn't the right format.
**Expect large files.** BMP output is significantly larger than PNG source files. Plan storage capacity before converting a large batch, and download files promptly.
**Keep your originals.** The conversion is reversible in terms of quality (both are lossless), but BMP files are bulky to store long-term. Keep the PNG originals as your compact archive copies.
**Verify with your target application.** Before converting a large batch, convert one file and confirm it loads correctly in the software that requires BMP.
**Game developers** working with older engines or modding tools that use BMP as their native texture format — common in legacy DirectX projects and hobbyist game development communities.
**Developers and engineers** building systems that process raw pixel data — hardware imaging interfaces, embedded vision systems, or custom pipelines where BMP's simple structure reduces decoding complexity.
**IT professionals** maintaining legacy enterprise or industrial software that only accepts BMP. Converting assets is faster than patching old applications.
**Anyone with a specific platform requirement** where a tool, import dialog, or integration spec explicitly requires BMP and PNG isn't accepted.
PNG to BMP is a niche conversion for specific workflows — legacy software, game development, or low-level image processing. If that's what you need, PortImg handles it in seconds in your browser. No software, no account, no watermarks. If you're not sure whether BMP is the right format for your use case, PNG is almost always the better lossless option.