BMP to JPG Converter
Convert BMP bitmaps to JPG and watch the file size collapse. BMP stores every pixel uncompressed, which is why a simple screenshot can arrive as a 20 MB file that email refuses to send.
Private by design: This tool runs entirely in your browser using its built-in image engine. Your files are not uploaded to a server, and nothing you convert is stored or logged. See how in-browser processing works.
How to convert BMP to JPG
Drop your BMP files onto the upload area, or click it to browse.
Adjust the quality slider if you need a specific size — 90% suits almost everything.
Click Convert, then download each JPG or the whole batch as a ZIP.
Why BMP files are so large
BMP is essentially a raw dump of pixels with almost no compression. A 1920×1080 screenshot needs about 6 MB as a BMP and often under 300 KB as a JPG — the same image, a fraction of the size. That difference is the entire reason this conversion exists.
Where BMP files usually come from
Older Windows software, medical and scientific instruments, industrial cameras, and legacy scanning tools still write BMP by default. The files open fine on Windows but are awkward to email, upload, or put in a document — and many web forms reject the extension outright.
When to keep the BMP
BMP is lossless, so if the file is a master you'll edit repeatedly, keep it and convert a copy for sharing. Convert to JPG when size matters more than perfect fidelity — PNG vs JPG walks through which side of that trade you're on.
Sitting on a folder of old scans instead? Those are usually TIFFs, and TIFF to JPG handles them the same way.
Good to know
Expect dramatic size savings — BMP is uncompressed, JPG is not.
JPG has no transparency; any transparent pixels in a 32-bit BMP are filled with white.
Very old or unusual BMP variants (some RLE-compressed files) may not decode in every browser.
Frequently asked questions
Why is my BMP file so much bigger than a JPG?
BMP stores each pixel uncompressed, so size depends only on dimensions. JPG compresses the image, typically to a small fraction of the BMP — usually with no visible difference.
Will converting lose quality?
JPG is lossy, so some data is discarded. At the default 90% quality it is rarely visible. Keep the original BMP if you need an exact master copy.
Can I convert several BMP files at once?
Yes. Drop in the whole batch, then download the files individually or together as a ZIP.
Is anything uploaded to a server?
No. Conversion happens entirely in your browser, so your images never leave your device.
Should I convert to JPG or PNG?
JPG for photographs and anything you're sharing where size matters. PNG if you need lossless quality or transparency — for example screenshots containing text you'll keep editing.