An animated GIF is almost always the wrong format — converting it to video shrinks it by an order of magnitude.
—
80
Resize
50
Encoder detail
6
fastzopfli
256
28
0 lossless51 tiny
The largest saving available.
50
Speed, audio and advanced
8
0 smallest13 fastest
128
96
Advanced
8
Nearly all of the saving comes from the images inside.
150
75
Advanced
50
aggressivegentle
Advanced
14
coarsefine
0 merges only exactly equal vertices. A small value also closes hairline cracks left by CAD exporters.
Geometry only — texture coordinates,
materials and vertex colours are not carried through. Decimating a
UV-mapped mesh correctly is a much harder problem, and mangling your
UVs quietly would be worse than leaving them alone.
12
6
Advanced
ZIP and 7z. 7z encrypts the file list too.
What actually shrinks GIF files
A still GIF re-encodes as PNG or WebP and gets much smaller with no visible change.
For animation, drop the file on the video page instead: the same frames as H.264 or VP9 are routinely ten to fifty times smaller than the GIF.
GIF is capped at 256 colours per frame, so anything photographic already looks worse than the alternatives.