BMP is an uncompressed bitmap format from early Windows that stores raw pixels, resulting in very large files. BMP files often come from legacy software or older screen captures and are impractical to share.
WebP is a modern format from Google that produces much smaller files than JPG or PNG at the same quality, with optional transparency. {T} produces dramatically smaller files, which helps web pages load faster. A quality slider lets you balance file size against sharpness.
FreeConvertImg converts your BMP files to WEBP entirely inside your browser — nothing is ever uploaded to a server, so the process is instant and completely private. There are no watermarks, no sign-up and no limits. Convert a single image or a whole batch at once, then download each WEBP file individually or all of them together in a ZIP archive.
Frequently Asked Questions
Why convert BMP to WEBP?
WebP files are much smaller at the same quality, so your images load faster on the web while looking just as good.
Will I lose quality?
WEBP uses lossy compression, but at a high quality setting the result looks virtually identical to the original while staying small.
Are my files uploaded to a server?
No. The entire conversion runs locally in your browser, so your files never leave your device.