About this tool
For photos stored as BMP, JPG gives the biggest size reduction, often 95% or more, while looking the same. Ideal for emailing or uploading scans and old photo archives.
About the formats: BMP is Windows' original uncompressed bitmap format. Files are enormous and it has no transparency support, so it survives mainly in legacy software, scanners, and old game assets. JPG (JPEG) is a lossy format built for photographs. It compresses aggressively, produces small files, and opens on every device ever made, but it cannot store transparency and each re-save costs a little quality.
BMP and JPG, side by side
| .bmp in | .jpg out | |
|---|---|---|
| Compression | None, usually | Lossy |
| Transparency | No in practice | No |
| Animation | No | No |
| Opens on | Everything | Everything |
Rows where the two differ are marked. The full story on each: BMP files and JPG files.
How to use it
- Drop your BMP files into the box above, or click to browse. Nothing is uploaded.
- Adjust the options if you want; the defaults suit most files.
- Click Convert to JPG and wait a moment.
- Download the results individually or all at once as a ZIP.
Questions
Should I convert BMP to JPG or PNG?
JPG for photographs and scans, PNG for screenshots, diagrams, and pixel art where every edge matters.
Is it free, are files uploaded, which browsers work: the general questions are answered once for the whole site.