Free BMP (.bmp) to JPG (.jpg) converter — batch conversion with quality control, entirely in your browser. No upload, no signup.
PNG · JPG · WebP · BMP · GIF · SVG · AVIF
BMP is the uncompressed Windows bitmap format: raw pixels with a header. Files are enormous but trivially simple, which is why BMP still appears in legacy Windows software, embedded systems and scientific tooling. There is almost never a reason to keep an image in BMP.
JPEG is the universal format for photographs. Its lossy compression is tuned for natural images — smooth gradients, real-world detail — and produces small files at quality levels that are visually indistinguishable from the original. It has no transparency support.
Yes — free, unlimited and without watermarks. Conversion runs on your own machine, so there are no server costs behind it.
No. Your browser decodes the BMP file and re-encodes it as JPG locally using the Canvas API. Nothing is transmitted anywhere.
The default 90% is visually indistinguishable from the source for almost all images. Around 80% is a good target for photographs on a web page. Below about 70% you start to see artefacts on flat areas and around sharp edges, and each re-encode compounds them.
Yes — drop any number of files and convert the whole batch in one click. A single result downloads as a file; a batch arrives as a ZIP, and each row shows the new dimensions and the size change.
JPG uses lossy compression and cannot store transparency. Transparent pixels are filled with the background color, and lowering the quality setting permanently discards more image detail.