JPG to BMP
Create the 24-bit bitmap files that legacy software and embedded devices often require.
JPG to BMP for legacy software and hardware
BMP is one of the oldest image formats on Windows, and it's still around for a good reason: it's so simple that almost anything can read it. Old Windows programs, industrial machines, small microcontroller displays and some older games all expect bitmap files.
This JPG to BMP converter writes a standard 24-bit bitmap in your browser, with no software to install. It's a quick way to get a file that those systems will accept.
How to convert JPG to BMP
The process takes seconds, with no options to think about.
- 1
Add the JPG
Drop one photo or graphic on the upload area. This tool converts one image at a time.
- 2
Press Convert to BMP
Each pixel is written straight into a 24-bit bitmap, with no compression and no settings.
- 3
Save the bitmap
Download the .bmp and copy it to the program or device that needs it.
BMP file sizes are predictable
Because nothing is compressed, you can work out a BMP's size from its dimensions: width × height × 3 bytes, plus a small header. That can matter on devices with limited storage.
| Image size | BMP size |
|---|---|
| 320 × 240 | About 230 KB |
| 800 × 600 | About 1.4 MB |
| 1920 × 1080 | About 6.2 MB |
| 4000 × 3000 | About 36 MB |
Shrink the image first with Resize Image if your device has a small screen or limited memory.
When to use something else
BMP isn't a good format for sharing. It's huge for email, and websites rarely accept it. If you only want a lossless copy for editing, JPG to PNG gives the same pixel accuracy at a fraction of the size. And if someone sends you a bitmap to view, BMP to JPG makes it easy to share.
Good uses for BMP are specific ones: a machine that lists only .bmp in its manual, a Windows app from the 1990s, or firmware that reads raw pixel rows.
Private and free
There's no account to create and no watermark on the bitmap. The conversion takes place on your own device, so the image isn't uploaded anywhere.
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Frequently asked questions
Drop your JPG on this page and press Convert to BMP. You'll get a 24-bit, uncompressed bitmap to download within a second or two.
BMP stores three bytes for every pixel, with no compression. A 1920 × 1080 picture is always about 6.2 MB, however simple the image is.
24-bit RGB. There's no alpha channel. If your device needs 8-bit, 16-bit or 1-bit bitmaps, you'll need an editor such as GIMP to convert it further.
No. It preserves what the JPG contains, including any compression artifacts. It just doesn't add any new ones.
Usually, yes. macOS Preview opens BMP files, and most phone gallery apps do too, although BMP is rarely useful there. For viewing or sharing on those devices, a JPG or PNG is a much more practical format.
The bitmap tools work one image per run. Just download the BMP, then drop in the next JPG.
Yes. Embedded screens and old apps often need exact dimensions, like 128 × 64 pixels. Use Resize Image first, then convert to BMP.
No. The bitmap is written in your browser, on your own device.
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