BMP is a image format: it stores uncompressed pixel data in a simple row-by-row grid, resulting in large file sizes but zero quality loss. WEBP is a image format that supports both lossy and lossless encoding with transparency and animation, typically 25-35% smaller than equivalent JPEG or PNG files. This conversion changes the file's encoding, compression method, and supported feature set. The output is pixel-accurate: no further quality is lost beyond what the source already encoded. Converting between these two formats is common when the source application does not support WEBP natively or when the target platform only accepts WEBP. 1converter processes this conversion server-side using open-source tools. Files are transferred over HTTPS, converted on secure cloud servers, and automatically deleted after 24 hours.