Upload the MP4 file and our converter samples frames (default 15 fps), encodes them into an animated WebP container, and applies palette quantization tuned for the WebP format (WebP GIF uses an adaptive 256-color palette; animated WebP supports full 24-bit color).
How short / long should my MP4 be for a good WebP?
Can I crop or resize the MP4 before making the WebP?
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Yes — the resize option scales the input down before frame extraction, which dramatically reduces final WebP size. A 480p WebP from a 4K MP4 is 16× smaller than a 4K WebP. Crop is handled in a separate /video-cutter/ step.
Animated GIF supports single-color transparency only (binary mask). Animated WebP and APNG support full alpha. MP4 sources that have no alpha channel (most camera footage) produce fully-opaque WebP regardless of format.
我可以分享在Discod/Slack/Twitter上的WebP?
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Yes — animated WebP GIF is universally supported. Animated WebP plays on Twitter, Discord and modern browsers but not on iMessage or older Slack clients. If maximum compatibility matters, target GIF; if file size matters, target WebP.