Convert BMP to JPG Online
Convert BMP bitmaps to compressed JPEG format online — dramatically reduce file size.
BMP files are uncompressed and can be extremely large. Converting a BMP to JPG applies JPEG compression, which typically reduces file size by 90–97% with minimal visible quality loss for photographic content. This makes BMP-to-JPG conversion useful for reducing storage usage, preparing images for email, or making large uncompressed images compatible with web upload limits. Since JPEG does not support transparency, transparent areas in the BMP are filled with a white background. Dockitt performs the conversion in your browser.
How to use
- Click 'Choose BMP' and select the BMP image you want to convert.
- Click 'Convert to JPG' and wait while the image is compressed.
- Download the JPG file.
FAQ
How much smaller will the JPG be compared to the BMP?
JPEG compression typically reduces file size by 90–97% compared to an uncompressed BMP. A 10MB BMP can often be converted to a JPG of 200–500KB with no visible quality difference for photographic content. The exact savings depend on the complexity and content of the image.
Will I lose quality converting BMP to JPG?
JPEG uses lossy compression, which means some image data is discarded. For photographic content, the quality loss at high JPEG settings is barely perceptible. For images with sharp edges, text, or flat solid colours, JPEG compression may introduce visible artefacts around edges. The tool uses a high quality setting to minimise visible loss.
What happens to transparent areas in the BMP?
JPEG does not support transparency. If the BMP file contains transparent pixels, they will be filled with a white background in the JPEG output. For images that require transparency, convert to PNG instead.
Why was my BMP file so large to begin with?
BMP stores every pixel without any compression. A single 1920×1080 24-bit BMP image is approximately 5.9MB regardless of content complexity. JPEG exploits visual redundancy in the image to store the same information far more efficiently, which is why the size reduction is so dramatic.
Can I convert scanned BMP images to JPG?
Yes. BMP files from scanners work exactly like any other BMP. If the scan is clean and high-resolution, the JPG output will be sharp. If the scan has noise, dust, or low resolution, those characteristics will be reflected in the JPG output.
Is the conversion done in my browser or on a server?
The conversion runs entirely in your browser using the Canvas API. Your image is never uploaded to any server.