JPG files are smaller and easier to upload, while large BMP files keep more raw detail for editing. BMP files store image data in a simple layout; when you are ready to publish or share, JPEG is usually the better fit.
Yes. Point the app at your BMPs, pick PNG, TIFF, GIF, or another supported output, and run the batch. Already have PNGs you want as JPG instead? The same app works as a PNG to JPG converter. The same toolset covers RAW and many camera formats. Batch Picture Resizer is a popular pick when people also need a cr2 to jpg converter. You still open each source file through the program before exporting. SoftOrbits built Batch Picture Resizer to keep that workflow simple on Windows 10 and newer versions.
A BMP to JPG converter free download with a GUI shows clear controls for people who prefer clicking through settings. A CLI remains useful when you script repetitive jobs or run jobs on a server.