What Is GIF? Understanding the Animated Image Format

CompuServe published GIF in 1987, and its 256-colour palette was generous for the hardware of the day. Animation support added in 1989 is the only reason it is still here: for three decades it was the only way to put a short silent loop on a web page that worked everywhere. Every modern format beats it comprehensively on both size and colour, but GIF remains the lowest common denominator that chat apps, forums and ad platforms still guarantee.

Compression: Lossless LZW over a 256-colour palette. Transparency: 1-bit only — a pixel is fully opaque or fully invisible. Animation: Yes — the reason the format survives. Colour: 256 colours maximum per frame. Typical file size relative to WebP: dramatically larger than animated WebP — often 3-5x for the same clip.

Universal. This is usually the deciding factor when choosing between GIF and WebP — WebP renders in every browser but is uneven in desktop software, while GIF has a very different support profile.

Animated WebP does everything GIF does at a fraction of the size and with 16 million colours instead of 256. Converting a GIF to WebP routinely cuts 60-80% off the file while removing the dithering and colour banding the palette forced on it. Going the other way costs real quality: a full-colour image squeezed into GIF's 256-colour palette will show visible banding and dithering, and GIF's 1-bit transparency turns WebP's soft alpha edges into hard jagged ones.

Convert WebP to GIF when a platform's uploader has a hard-coded format list — some forum software, older email systems, chat platforms and ad networks still accept GIF and nothing more modern. Expect the GIF output to be dramatically larger than animated WebP — often 3-5x for the same clip — that difference is the price of getting a format the destination will actually accept.