Convert BMP to JPG
Drop the BMP and download it as JPG, at a fraction of the size.
Drop an image here
or
PNG, JPG, WEBP, HEIC, AVIF, JXL, GIF, BMP, TIFF and SVG · up to 20 MB
A BMP compresses absolutely nothing
BMP is about as close as you get to having no format at all. It stores pixels one after another, exactly as they are, with no compression of any kind. You can work out the file size with a multiplication: width times height times three bytes. A 1920 × 1080 image takes about 6 MB whether it's a fiendishly detailed photograph or a white rectangle.
That simplicity made sense when decompression was expensive and disk was the plentiful resource. Today it's the other way round, which is why a BMP in 2026 is almost always a file somebody saved without thinking about the format: Paint, an old scanner, an industrial camera, or a scientific program that writes uncompressed on purpose.
What you gain
The reduction is among the largest any conversion can deliver: several megabytes down to a few hundred kilobytes is typical for a photograph. And there's a non-obvious advantage — because the BMP had compressed nothing, this is the first lossy compression the image has ever seen. You're starting from the best possible point, not from a file that arrived already degraded.
JPG or PNG, depending what's inside
Worth looking at the image before choosing:
- A photograph: JPG, without hesitation. It's what the format is for and the reduction is enormous.
- A screenshot, diagram or drawing with text: PNG. It also shrinks hugely against BMP, and it doesn't leave the halos JPG produces around hard edges and letterforms.
- A scientific or measurement image: think twice. If someone saved it uncompressed deliberately, the exact value of each pixel may matter. PNG preserves those values; JPG alters them.
Common questions
- Why is a BMP so large?
- Because it stores every pixel as-is, with no compression at all. The size is literally width times height times three bytes: a 1920×1080 image takes about 6 MB whatever is in it. A JPG of that same image usually lands under 300 KB.
- Do I lose quality converting?
- Some, because JPG is lossy. It's the first compression the image has ever been through, so you're starting from the best possible point, and at the default quality it isn't noticeable on a photograph.
- Where do BMP files come from?
- Windows, nearly always. It was Paint's native format for decades, and it's what some older scanners, industrial machine cameras and quite a few scientific and medical programs produce, saving uncompressed on purpose.
- JPG or PNG?
- If it's a photograph, JPG: far smaller. If it's a screenshot, a diagram or anything with text and hard edges, PNG — it also shrinks enormously against BMP and doesn't smear the edges.
- Is transparency preserved?
- An ordinary BMP has no transparency, so there's nothing to lose. If yours did have it, JPG would fill it with the colour you choose.