About the BMP to JPG tool
BMP files are uncompressed and enormous. Converting BMP to JPG usually shrinks files by 90%+ while looking identical on screen.
The conversion runs on your device. BMP files are large, and not uploading one is the difference between instant and a long wait.
How to use it
- Add your BMP files.
- Choose a JPG quality.
- Download the compressed results.
BMP stores images with almost no compression at all
A bitmap records every pixel literally. A 1920×1080 BMP occupies about 6 MB regardless of what the image actually contains — a blank white rectangle costs the same as a detailed photograph.
Converting to JPG typically cuts that by 90% or more with no visible difference, which is why BMP survives mainly in legacy Windows software and scientific instruments.
What the numbers look like
The arithmetic is simple: width × height × 3 bytes for 24-bit color. A 1920×1080 BMP is 1920 × 1080 × 3 ≈ 6.2 MB.
The same image as JPG at quality 85 will typically land between 200 KB and 500 KB depending on detail — a reduction of roughly 95%.
Common mistakes
- Keeping BMP files for web use, where they are enormous and poorly supported.
- Converting at maximum quality, which throws away most of the size benefit.
- Assuming BMP means better quality. It is uncompressed, not higher resolution.
Questions people ask
Why are BMP files so large?
Because they store each pixel with essentially no compression. Format, not image quality, drives the size.
Does converting lose quality?
JPG is lossy, so technically yes, but at quality 85 the difference is invisible while the file is a fraction of the size.
Should I use PNG instead?
For screenshots and flat graphics, yes — PNG is lossless and still far smaller than BMP.