BMP to JPG Converter

BMP is an uncompressed (or minimally compressed) bitmap format, which makes files large, often many times bigger than a JPG or PNG of the same image. Converting BMP to JPG shrinks the file dramatically by applying lossy compression, useful for emailing, uploading, or storing images that came from BMP-producing sources like screen capture tools, legacy Windows software, or some scanning and imaging equipment. Because BMP itself carries no compression to begin with, this is typically the first time the image data actually loses any detail. This tool converts BMP to JPG directly in your browser, no software to install and no file uploaded to a server.

How to use

1. Upload your BMP. Drag a BMP file onto the drop zone or click to browse. Only BMP files are accepted for this converter.
2. Click Convert to JPG. Adjust the quality slider first if you want, it defaults to 90%. If your BMP has any transparent areas, they'll be filled with solid white before the image is encoded, JPG has no transparency channel to preserve them.
3. Download your JPG. Click Save to download the converted file, or Save As to pick the filename and location yourself.

BMP vs JPG

BMP stores image data uncompressed, or with only basic lossless compression in some variants, which means file sizes stay close to the raw pixel data, often tens of megabytes for a single photo. JPG uses lossy compression to shrink files dramatically, typically to a fraction of the original size, at the cost of some image detail. Converting BMP to JPG is usually a large size reduction with a real, if often minor, quality trade-off, since this is typically the first compression the image data has been through. Most BMP files have no transparency to begin with, so there's rarely anything to flatten, though this converter fills any transparent pixels with white just in case, since JPG has no alpha channel at all.

Tips for best results

• Expect a dramatic size reduction. BMP files are often tens of times larger than an equivalent JPG. If a BMP is unmanageably large for email or upload, converting to JPG is usually the fastest fix.
• This is the first compression pass for most BMPs. Unlike converting an already-compressed JPG or WebP, most BMP source files haven't lost any detail yet, so this conversion is where the first (and only) generation of quality loss happens. Use a higher quality setting if the image matters.
• Lower the quality slider for maximum size reduction. The default 90% keeps most images visually close to the source with a large size cut already. Drop it further, toward 50–70%, if file size is the priority.
• Compress further if needed. If the JPG is still larger than you'd like, run it through the image compressor afterward for additional size reduction.

Why use PixMidas

• 100% private. The conversion redraws your image on a canvas and re-encodes it entirely in your browser. Your BMP is never uploaded to any server.
• Straightforward about the trade-off. BMP has no compression to lose, so converting to JPG is a real, one-time quality trade for a much smaller file, not a lossless format swap.
• No account needed. Free and instant. Works in any modern browser, no installation required.

Frequently asked questions

Why is my BMP file so much bigger than other image formats?

BMP typically stores image data uncompressed, or with only very basic lossless compression, so file size scales directly with the image's pixel dimensions and color depth. A photo that's a few hundred KB as a JPG can easily be tens of megabytes as a BMP.

Will converting to JPG lose quality?

Some, yes, since JPG uses lossy compression. Unlike converting an already-compressed format like WebP or another JPG, most BMP source images haven't lost any detail yet, so this conversion is typically the first (and only) generation of compression loss the image goes through. At the default 90% quality, the difference is usually minor and hard to notice.

How much smaller will the JPG be?

Substantially smaller in almost every case, often by a factor of ten or more, since BMP carries no meaningful compression to begin with and JPG's lossy compression is very space-efficient.

Does my BMP have transparency that could be lost?

Usually not. Most BMP files, especially those from screenshots or standard Windows tools, have no alpha channel at all. Some 32-bit BMP variants do support transparency, and if yours does, converting to JPG fills any transparent pixels with solid white, since JPG has no transparency support.

Why would anyone still have a BMP file?

BMP is a legacy Windows format still produced by some screen capture tools, older software, certain scanning and imaging equipment, and specific technical or industrial applications. If you received or exported a BMP and need something more practical to share or store, converting it is usually the right move.

Is my image uploaded to a server?

No. The entire conversion runs on your device using your browser's Canvas API. Your BMP is read locally, redrawn, and re-encoded as JPG without ever being sent anywhere.