Convert BMP to JPG
BMP files are enormous because they store every pixel raw. Convert them to JPG on your own device and the stamp shows the saving — typically well over 90% — with nothing uploaded anywhere.
100% private — this tool runs in your browser. Your file is never uploaded to any server.
How it works
BMP is one of the oldest image formats still in circulation — Windows Paint, old scanners and some industrial software still produce it — and it stores pixels with no compression at all, which is why a modest screenshot can weigh several megabytes. Converting to JPEG re-encodes the same picture with modern photographic compression at high quality. The visual difference at the quality used here is not something you will spot at normal viewing size; the file size difference is dramatic and the stamp reports it exactly. Because both formats are opaque, nothing is lost to flattening: BMP has no transparency to begin with.
Step by step
Add your BMPs
Drop one or more, or tap to choose.
Convert
Each bitmap is re-encoded on your device.
Check the saving
The stamp reports old size, new size and percent.
Download
Save each JPG — your BMP originals are untouched.
Frequently asked questions
How much smaller will my BMP get as a JPG?
Usually more than 90%. BMP stores pixels raw, so a 5 MB bitmap routinely becomes a JPG of a few hundred kilobytes. The stamp on this page shows the exact figure for your file rather than an estimate.
Does converting BMP to JPG lose quality?
JPEG is lossy, so technically yes — but at the high quality used here the difference is invisible at normal viewing size. If your BMP contains sharp line art or text and you want a pixel-perfect copy, convert it to PNG instead, which is lossless.
Where do BMP files even come from these days?
Windows Paint saves, screenshots from older systems, fax and scanner software, and exports from industrial or medical equipment. The format works fine — it is just wildly inefficient for storage and sharing.
Why won’t websites accept my BMP upload?
Many upload forms allow only JPG and PNG because those are the web’s standard formats. Converting to JPG here produces a file those forms accept, at a fraction of the size, without installing anything.
Can I convert a whole folder of BMPs?
Yes — select or drop them all and each converts with its own download button and size readout. Large batches are limited only by your device’s memory.
Is anything uploaded when I convert?
No. The bitmap is decoded and re-encoded by your own browser. For scans of documents or ID — a common source of BMPs — that privacy is the reason to convert here rather than on an upload site.
My BMP will not open — why?
A few rare BMP variants (unusual bit depths or RLE compression from very old software) are not decodable by browsers. Open the file in any image viewer and re-save it as a standard BMP or PNG, then convert.
Should I convert BMP to JPG or PNG?
JPG for photos and scans — smallest files. PNG for screenshots, line art and text — lossless and still far smaller than BMP. If unsure, JPG is right for anything that looks like a photograph.