ALL IMAGE TOOLS56
BMP to JPG
Convert BMP to JPG Online — Free & Fast
Convert uncompressed BMP files to compact JPG — huge size savings.
About BMP to JPG
BMP (Bitmap) is an uncompressed image format that produces very large files — a simple photo can be 10-50 MB as a BMP. While BMP preserves every pixel without compression artifacts, the enormous file sizes make it impractical for sharing, uploading, or web use. Converting to JPG typically reduces file size by 90% or more while maintaining good visual quality for photographs. This tool loads your BMP file in the browser, draws it to a Canvas element, and re-exports it as a compressed JPG. No files are uploaded to any server, so your images stay private on your device. Adjust the quality slider to balance file size and image quality — higher quality produces larger files with fewer compression artifacts, while lower quality yields smaller files suitable for thumbnails or previews. Common use cases include converting screenshots from legacy Windows applications, processing scanned documents saved as BMP, and preparing images from older digital cameras that output BMP files. Batch processing is supported so you can convert multiple BMP files at once.
Questions
Why are BMP files so large?
BMP (Bitmap) stores every pixel's color data without any compression. A 12-megapixel photo can be over 36 MB as a BMP. Converting to JPG applies lossy compression that typically reduces size by 90% or more.
Will I lose quality converting BMP to JPG?
JPG uses lossy compression, so there is some quality reduction. However, at 85-90% quality, the difference is virtually invisible to the human eye while the file size drops dramatically.
Where do BMP files come from?
BMP files are common in legacy Windows applications, screenshots from older software, scanned documents, and certain embedded systems. They're rarely used today because of their enormous file size.
Can I convert a JPG back to BMP?
Not here — browser canvas encoders can't write BMP (asking for one silently produces PNG bytes wearing a .bmp name), so BMP works as an input format only. If you need a lossless copy, PNG fills the same role at a fraction of the size.
Will the JPG keep the original resolution?
Yes — the image is re-encoded pixel-for-pixel at its original width and height; only the compression changes. For scanned documents that means the detail you keep is decided by the quality slider, not by any resizing.
Is my file uploaded to a server?
No. Transmute processes everything locally in your browser using JavaScript and WebAssembly. Your files never leave your device — there is no server, no upload, no cloud processing.