BMP (Windows bitmap) files are usually stored without any compression, so a single full-HD screenshot can take around 6 MB. They come from old scanners, Windows Paint, industrial cameras, legacy software and exported screenshots. Most websites and email services do not accept them, and they waste space.
This tool converts BMP files to JPG, typically making them 90% smaller or more while keeping the picture looking the same. Choose the quality, convert one file or a whole batch, and download a ZIP. Your bitmaps are converted in the browser and never uploaded.
How to use the BMP to JPG tool
- Choose or drop your .bmp files onto the box.
- Set the JPG quality. 85–90 is a good default.
- Click Convert and look at the size savings.
- Download the JPG files individually or as a ZIP.
Why use ToolOrca BMP to JPG
- Huge size reduction from uncompressed BMP
- Adjustable JPG quality
- Batch convert old archives
- ZIP download
- Before and after file size
- Runs on your device, offline-ready
Why BMP files are so large
A standard 24-bit BMP stores three bytes for every pixel with no compression, so file size is simply width × height × 3. A 1920 × 1080 image is about 6.2 MB, and a 12-megapixel scan around 36 MB. JPG analyses the image and stores it far more efficiently, so the same picture often fits in a few hundred kilobytes.
JPG or PNG for converted bitmaps?
Choose JPG for scanned photos and pictures with many colors. For screenshots, diagrams or pixel art with sharp edges and flat colors, a lossless PNG is better; use the Image Converter and pick PNG as the output.
Frequently asked questions
How much smaller will the JPG be?
Usually 90–98% smaller than an uncompressed BMP, depending on the picture and the quality you choose.
Will I lose quality?
JPG is lossy, but at quality 85–90 the difference from the BMP is very hard to see in photos and scans. Sharp text and line art may look slightly softer.
My BMP will not open. Why?
Browsers support the common BMP variants. Rare formats such as some 16-bit, RLE-compressed or OS/2 bitmaps may not decode. Open them in an image editor and save as PNG first.
Is the conversion private?
Yes. Files are converted locally by your browser; nothing is sent to a server.