Convert JPG images to uncompressed BMP for Windows apps, legacy software, and raw pixel workflows
Drop JPEG files here
or browse files
Up to 10 files · 50 MB each
Click "Upload JPG" 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. Note that BMP output files are significantly larger than the source JPGs — 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 lossy compression, so the output is a direct pixel-accurate representation of your source image. No compression artifacts, no quality trade-offs.
Every Windows application that handles images can open BMP files — including legacy tools that don't support modern formats like WebP or even PNG.
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.
Convert up to 10 JPG files to BMP in one session — useful when you need to prepare 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 — they predate widespread JPG support and were never updated. If you're feeding images into one of these systems, converting to BMP is often the simplest path. It's not a common workflow today, but when you need it, you need it.
Certain game engines, level editors, and graphics toolchains — especially older ones — use BMP as their native texture format. Converting source JPG images to BMP gets them into the pipeline without requiring engine-side conversion or custom import plugins.
Some image processing pipelines, hardware interfaces, and embedded systems work directly with raw pixel buffers. BMP's uncompressed format stores pixel data in a straightforward, well-documented structure that's easy to read without a complex decoder — making it useful in low-level programming and hardware contexts where parsing a compressed format would add unnecessary overhead.
No software to install. Works directly in your browser on any device.
Convert up to 10 JPG files to BMP in a single session. Files are processed in parallel and downloadable individually or as a ZIP.
Supports source JPG files up to 50 MB. Keep in mind that BMP output files will be considerably larger than the input.
The converter produces clean BMP output without introducing additional lossy compression steps. What you put in is what you get out, in uncompressed form.
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.
JPG and BMP are at opposite ends of the compression spectrum. JPG trades some quality for dramatically smaller file sizes. BMP stores every pixel uncompressed, which means perfect fidelity but very large files. The right choice depends entirely on what your target application needs.
| Aspect | JPEG | BMP |
|---|---|---|
| Compression | Lossy | None (uncompressed by default) |
| Transparency | No | No |
| Animation | No | No |
| Typical File Size | Small to medium (50 KB – 5 MB for photos) | Very large (1 MB – 100+ MB) |
| Color Depth | 24-bit (16.7 million colors) | Up to 32-bit |
| Best For | Photos, social media, web delivery | Windows legacy apps, game assets, embedded systems |
| Browser Support | All browsers | Limited — most browsers don't display BMP natively |
Convert JPG to BMP when a specific application, pipeline, or legacy system requires BMP input. For general use, JPG, PNG, or WebP are more practical choices — BMP files are significantly larger and not supported by most modern web tools.
JPG to BMP is a niche conversion. It's not something most people need day-to-day, but when a specific application, game engine, or legacy system requires BMP input, it's exactly what you need. BMP is Microsoft's native Windows bitmap format — uncompressed, straightforward, and universally understood by Windows software. The trade-off is file size: a 3 MB JPG can easily become a 30–50 MB BMP. Understanding when that trade-off is worth making is the key to using this converter effectively.
The honest answer is: not often. BMP is a legacy format that has largely been superseded by PNG for lossless needs and WebP for web delivery. But there are real situations where it's the right call.
The most common is legacy software compatibility. Older Windows applications — particularly in industrial, medical, and enterprise contexts — sometimes only accept BMP. These tools were written before other formats became universal and were never updated. Converting your images to BMP is faster than trying to modify or replace the software.
Game development is another valid use case. Some game engines and level editors, especially older ones built on DirectX, use BMP as their native texture format. If your pipeline expects BMP, you need BMP.
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 image processing tools that work with raw pixel buffers, BMP's lack of compression is actually an advantage — there's no decoding step.
**File size:** This is the biggest practical difference. JPG achieves small file sizes through lossy compression. BMP stores every pixel uncompressed. A typical photo that's 2–4 MB as a JPG can be 20–100 MB as a BMP. Make sure you have storage space and that your target system can handle the larger files.
**Quality:** BMP doesn't introduce any new compression of its own, so converting to BMP won't make your image look worse. If your source JPG has visible compression artifacts, those will carry over — but no additional degradation occurs in the conversion.
**Browser support:** BMP is not supported by most web browsers. Don't use it for web delivery or any context where images need to display in a browser.
**Transparency:** Neither JPG nor BMP supports transparency. If you need transparent backgrounds, PNG is the right format.
**Expect large files.** BMP's uncompressed nature means output files will be dramatically larger than the source JPGs. This is normal — plan your storage accordingly before converting a large batch.
**Keep your originals.** The conversion from JPG to BMP is one-directional in terms of file size. If you need to go back to a compressed format later, you'll want the original JPG rather than re-compressing from BMP.
**Check if PNG would work instead.** If your reason for converting is lossless quality rather than BMP-specific compatibility, PNG is a better choice — lossless like BMP, but far smaller in file size and broadly supported. BMP is the right call only when something specifically requires it.
**Verify the output.** After converting, open a few files to confirm they load correctly in your target application before processing a large batch.
**Game developers** working with older engines or toolchains that use BMP as their native texture format. It comes up most often in hobbyist game development, modding communities, and legacy engine projects.
**Developers and engineers** building systems that process raw pixel data — hardware interfaces, embedded imaging systems, custom computer vision pipelines — where BMP's simple structure reduces decoding complexity.
**IT professionals and system administrators** maintaining legacy enterprise or industrial software that predates broad format support. Converting assets to BMP is often easier than patching or replacing the software.
**Anyone dealing with specific platform requirements** where BMP is explicitly required by a tool, import dialog, or integration spec.
JPG to BMP is a specialized conversion for specific workflows — legacy software, game development, or low-level image processing. If that's what you need, PortImg handles it in seconds directly 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 usually the better lossless alternative.