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Definition
GIF (Graphics Interchange Format) is an image format that supports animation and transparency. Limited to 256 colors per frame, GIFs are used primarily for short animations, reactions, and simple graphics. Despite being inefficient by modern standards, GIF remains the dominant format for web animations.
GIF was introduced by CompuServe in 1987 and became the first widely-supported animated image format on the web. Each GIF frame is limited to a palette of 256 colors (8-bit), which is why GIFs of photographs look banded and dithered. The format uses LZW lossless compression, which works well for flat-color graphics but poorly for photographic content.
Despite its technical limitations, GIF has become a cultural phenomenon. The format is synonymous with short looping animations, reaction images, and memes. GIF support is universal — every browser, messaging app, social platform, and email client can display animated GIFs. This ubiquity is GIF's strongest advantage.
For web developers, animated GIF files are often excessively large. A 5-second GIF clip can easily exceed 10MB. Better alternatives include WebP (animated), AVIF (animated), or simply using looping MP4/WebM video elements, which achieve 10-50x better compression with better color reproduction. Despite these technical alternatives, GIF's simplicity and universal support keep it relevant.