Convert BMP and bitmap images to JPEG directly in your browser. Great for screenshots, MS Paint files, and old bitmap images that need to be smaller and more compatible.
Up to 80%
Smaller Size
Quality
Adjustable
Instant
Conversion
Private
No Uploads
Drop BMP files here or click to browse
Supports .bmp and .dib, all processing stays in your browser
BMP is an old, mostly uncompressed format. Converting to JPEG is almost always the right move before sharing or publishing.
Windows screenshots
Some screenshot tools and older Windows utilities save directly as BMP. Convert to JPG before sharing.
MS Paint and legacy software exports
Older drawing and graphics tools default to BMP. A JPEG version is far smaller and easier to use elsewhere.
Scanned images from old hardware
Some scanners and fax-to-image software output BMP by default, producing very large files for simple images.
Email and upload form attachments
BMP files are often rejected or too large for upload forms and email attachments. JPEG is universally accepted.
A BMP file is close to a raw dump of pixel data. Past a small header describing width, height and color depth, the rest of the file is just the pixels themselves, row by row, with little or no compression applied. That's why a 1920 by 1080 BMP saved at full 24-bit color can land around 6MB, while the same image as a JPEG might come in under 400KB.
JPEG compression works by smoothing out subtle color variation, which is great for photos but rough on sharp edges. A BMP screenshot full of text or a line drawing exported from old CAD or diagramming software can pick up visible fuzz and color fringing around every letter and line once compressed as JPEG. For that kind of content, BMP to PNG keeps every edge crisp since PNG compression is lossless.
Not every BMP is full color. Older fax software, some monochrome scanners and early Windows tools often save BMPs at 1-bit or 8-bit color depth, using a small palette instead of millions of colors. Converting one of these to JPEG won't add detail that was never captured, though the file will still shrink since JPEG stores color information far more efficiently than an uncompressed palette does.
The 85% default in this tool suits ordinary photos and screenshots well, keeping the file small without visible loss. Scanned documents with dense text benefit from pushing the quality up closer to 95%, since small artifacts are much more noticeable around fine letterforms. Dropping much below 70% tends to introduce blocky patches around any sharp detail in the original bitmap.
BMP files are typically uncompressed or only lightly compressed, which makes them much larger than other formats for the same image. A screenshot or scanned image saved as BMP can easily be 5 to 10 times the size of an equivalent JPEG. Converting to JPEG makes the file far smaller and easier to share by email, upload to a website or attach to a message.
JPEG uses lossy compression, so there is some quality reduction compared to the uncompressed BMP original. At the default 85% quality setting in this tool, the difference is not visible for typical photos and screenshots, while the file size drops dramatically, often by 80 percent or more.
No. BMP is one of the oldest image formats and every modern browser can read it natively, the same way browsers read JPEG and PNG. This tool uses your browser's own built-in image decoder, so there is no extra software or library involved in reading the file.
No. Both the decoding and the JPEG encoding happen entirely in your browser. Your file never leaves your device at any point during the conversion.
