Convert BMP to JPG
Free, private and fast: everything runs in your browser and your BMP files are never uploaded.
BMP to JPG: why convert
BMP files come from older scanners, Paint, Windows screenshots and programs that write pixels as they are, without compression. That makes them exact but huge: a photo of a few megapixels can be tens of megabytes, and email, websites and upload forms often refuse BMP altogether. Converting to JPG typically makes the file ten to twenty times smaller with no difference you can see in a photo or a scan. Drop one BMP or a folder's worth, choose the JPG quality, and download the JPG or a zip of all of them. The list shows each image's size before and after, so you can see what you saved.
How to convert BMP to JPG
- Drop your BMP files in the box, or click to choose them.
- Pick the JPG quality; 90 % is a good default.
- Click Convert to JPG and download the JPG, or a zip with all of them.
What changes when you convert
Screenshots and line drawings
For photos and scanned pages JPG is ideal. For screenshots, charts and drawings with sharp edges and flat colours, small smudges can appear around text at lower quality; use 95 % for those.
Transparency
Most BMP files have no transparency. The rare 32-bit BMP with an alpha channel gets a white background in the JPG, because JPG cannot store transparency.
Unusual BMP variants
BMP has many old variants, such as OS/2 bitmaps or files with embedded JPEG or PNG data. Browsers read the common Windows versions; if a file cannot be read, the tool says so instead of producing a broken JPG.
Large images
A BMP is decoded in full before it is compressed, so very large scans need a lot of memory. Phones can struggle above roughly 16 megapixels; a computer handles much more.
About the formats
BMP
BMP (bitmap) is the image format built into Windows since the first versions. Most BMP files store every pixel uncompressed, so they are exact but very large: a 12-megapixel photo is about 36 MB as a BMP and a few MB as a JPG.
- Usually uncompressed, so files are many times larger than PNG or JPG.
- Opens in Windows and most image editors, but many websites and upload forms do not accept it.
- Often comes from older scanners, Paint and other Windows programs.
JPG
JPG (or JPEG) is the most widely used image format for photos, supported by every camera, phone, browser and image editor. It uses lossy compression, which keeps files small at a small cost in quality.
- Best for photos; text and sharp lines can get blurry edges.
- No transparency: transparent areas become a solid colour.
- The quality setting trades file size against detail.
Frequently asked questions
Are my BMP files uploaded?
No. The images are read and converted by your browser on your own device.
How much smaller does the file get?
For photos and scans usually 90–95 % smaller at 90 % quality. A BMP of a few flat colours shrinks too, but such images are often better as PNG.
Does the picture lose quality?
JPG is lossy, but at 90 % the difference is not visible in normal viewing. Keep the BMP if you need every pixel exactly as it was.
Can I convert many files at once?
Yes. Select or drop many at once, up to about 200 MB per batch; several JPGs are downloaded together as one zip.