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Drop one GIF or two hundred. Batch conversion is not a paid feature here.
A GIF is far too heavy for a web page, a message or a social platform that will re-encode it anyway.
GIF stores every frame as an independent 256-colour image. H.264 stores the differences between frames and works in full colour, so the same animation commonly drops by 90 percent or more while looking better.
MP4 has no transparency, so a GIF with a transparent background lands on a solid colour. H.264 also requires even pixel dimensions, so a GIF with an odd width or height gets padded or cropped by a pixel.
Yes, with the autoplay, muted, loop and playsinline attributes on the video element. Muted is mandatory or browsers block autoplay.
Inter-frame prediction. A GIF re-sends every pixel of every frame; H.264 sends what changed.
They prefer it. Most of them convert uploaded GIFs to MP4 on arrival anyway.
Drop one GIF or two hundred. Batch conversion is not a paid feature here.
MPEG-4 Video is lossy, so the quality control decides the trade between size and fidelity.
Instant, because the file never went anywhere. Nothing expires, since nothing was stored.