Converting BMP to GIF dramatically reduces file size, making images practical for web use and sharing. BMP is uncompressed and enormous; GIF uses compression and is web-compatible. However, for most images, PNG is a better choice than GIF with superior quality.
GIF files will be 80-95% smaller than BMP. A 10MB BMP might become a 500KB-1MB GIF. The exact reduction depends on image complexity and colors used. GIF's 256-color limit helps create small files but reduces photo quality.
Yes, if the image has more than 256 colors. BMP supports millions of colors, but GIF reduces to 256, creating color banding in photos and gradients. For simple logos and graphics with few colors, quality loss may be minimal.
Use PNG for static images - it offers better quality and often better compression than GIF. Use GIF only if you need animation or must support extremely old browsers. For modern web use, PNG or WebP are superior to GIF.
No. For scanned documents, use PNG for lossless quality with good compression, or JPG for photographs. GIF's 256-color limit can make text look fuzzy or create artifacts. PNG is far better for document preservation.