Converting JPG to BMP produces an uncompressed copy of the image: every pixel stored as raw RGB bytes. The JPG's lossy artifacts come along for the ride, but the result loads instantly and is trivial for any piece of Windows software to decode.
Drag & drop image files here, or browse
Drop your JPG files here
BMP files are enormous. A 1920×1080 photo that fits in 500 KB as JPG becomes 6 MB as BMP. Quality doesn't change; the pixels are what the JPG decoded to. You're trading disk space for decode simplicity.
BMP is natively supported by every version of Windows ever released, plus most image viewers on every platform. It's not as universal as JPG or PNG for web use, but for desktop and embedded use it's almost always available.
JPG (JPEG) is a 1992 lossy photo format that became the default way to store photographs on the web. It uses a discrete cosine transform plus quantization, tuned so that errors fall where human vision is least sensitive. No transparency, no animation, but excellent for photos at 70–90% quality.
BMP is the uncompressed Windows bitmap format from 1990. Files are huge because almost nothing is compressed, but the format is trivial to decode and supported by virtually every Windows utility, embedded system, and legacy tool. Useful as an interchange format when other options fail.
No. BMP is uncompressed, but the source JPG was lossy, so the BMP just stores the JPG's decoded pixels verbatim. Same quality, much larger file.
BMP stores each pixel as 3 or 4 raw bytes with no compression. A JPG compresses photos 10–50×; a BMP of the same image is that original uncompressed size.
JPG (JPEG) is a 1992 lossy photo format that became the default way to store photographs on the web. It uses a discrete cosine transform plus quantization, tuned so that errors fall where human vision is least sensitive. No transparency, no animation, but excellent for photos at 70–90% quality.
BMP is the uncompressed Windows bitmap format from 1990. Files are huge because almost nothing is compressed, but the format is trivial to decode and supported by virtually every Windows utility, embedded system, and legacy tool. Useful as an interchange format when other options fail.
Yes. The converter runs entirely in your browser using WebAssembly. Your images are never uploaded, never sent to a server, and never leave your device.
There's no hard limit, but because everything runs in your browser you're bounded by available memory. Very large images (over a few hundred megapixels) can hit browser memory limits. Process in smaller batches if you run into issues.