How a GIF stores animation
Each frame can be a full image or a small patch that changes part of the previous frame, with a per-frame delay. That patch trick saves space but is why photo-like GIFs still bloat: complex scenes change too much between frames.
The 256-color ceiling
GIFs index colors through a palette of at most 256 entries per frame. Photographic content dithers and bands; flat-color art, screenshots and simple motion look clean. Fewer colors is also the compressor's main lever.
GIF vs MP4/WebM
- GIF: plays anywhere, no codecs, loops by default — but large files
- MP4/WebM: 10–50× smaller for the same clip, needs a video element
- Rule of thumb: under ~10 seconds and simple graphics → GIF; longer or photographic → video
Pronunciation
The creator says 'jif', much of the internet says 'gif' with a hard G. Both are acceptable — the format answers to either.
Frequently Asked Questions
Is GIF lossy or lossless?
The GIF format itself is lossless for its 256-color palette — but any photo converted to 256 colors has already lost color information, and recompression with fewer colors is lossy.
Why do GIFs have no sound?
The 1987 spec predates practical audio in image formats. Sound is one of the main reasons platforms convert GIFs to silent video loops.
What resolution should a GIF be?
Match where it plays: 480–800 px wide for chat and most web use; full HD only for detailed screen recordings viewed fullscreen.
Can a GIF be transparent?
Yes — single-color transparency per frame (binary, no soft alpha edges). It is why GIF stickers have hard edges compared to WebP or APNG.