Image
Convert BMP to JPG
Free, private, and instant — your files never leave your device.
BMP files are uncompressed: every pixel is stored as raw bytes, making even modest images enormous. A 1920×1080 BMP is around 6 megabytes — compared to 200–400 kilobytes for the same photograph as a JPEG. JPEG's lossy DCT compression achieves dramatic size reductions by discarding fine spatial detail the eye barely perceives. Converting BMP to JPEG is the standard path for getting raw, uncompressed images into a share-ready, upload-friendly size. Trade-offs: JPEG does not support transparency (transparent areas in 32-bit BMPs become white), and lossy compression introduces minor artifacts at lower quality settings.
BMP
Windows Bitmap
- Lossless compression
- Supports transparency
- Best for: Windows system resources, uncompressed raw pixel exports
JPEG
Joint Photographic Experts Group
- Lossy compression
- No transparency
- Best for: photographs, social media images, email attachments
How to Use
- 1
Drop your BMP file — the output format is already set to JPEG.
- 2
Adjust the quality slider. 85–90% produces excellent results for photographs; go lower for smaller files when sharpness is less critical.
- 3
Click "Convert to JPEG" — conversion runs in your browser.
- 4
Download the JPG. Expect a file 10–30× smaller than the original BMP.
Frequently Asked Questions
How much smaller will the JPEG be compared to the BMP?
Typically 10–30× smaller for photographic content at quality settings of 80–90%. A 6 MB BMP often yields a 200–500 KB JPEG, depending on image content and the quality setting you choose.
Will the JPEG look the same as the BMP?
At quality settings of 85% and above, the difference is imperceptible in photographs. JPEG struggles more with sharp edges, text, and flat-color regions — those compress poorly and may show visible artifacts at lower quality settings.
What about transparency in 32-bit BMP files?
32-bit BMPs can store an alpha channel, but JPEG does not support transparency. Any transparent pixels are composited onto white in the JPEG output. To preserve transparency, convert to PNG or WebP instead.
Is BMP-to-JPG conversion lossless?
No. JPEG applies lossy compression, so some image detail is permanently discarded. The BMP source is lossless (uncompressed), but the JPEG encoding introduces compression artifacts — controlled by the quality slider.