Step 1: Transfer your MP4 files using the button above or by slide and deposit.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Retrieve your converted WebP files.
MP4 to WebP Conversion FAQ
What file size should I expect from a 5-second MP4 → WebP?
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Animated GIF: 2 to 8 MB at 480p depending on motion complexity. Animated WebP: 200 KB to 1 MB at the same resolution / quality. Animated WebP is 5 to 10x more efficient than GIF for the same visual quality. WebP offers both lossy and lossless modes, with alpha transparency and animation available in either.
Does it matter that the MP4 came off a phone or a camera?
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Mainly for the orientation. An MP4 is an ISO base-media file, and that family records rotation as a flag in the container rather than by turning the pixels — which is why a clip shot upright on a phone can look right in one player and lie on its side in another. The animation is built from the decoded pixels, so that flag has to be honoured before the first frame is written; if the preview comes back sideways, rotate the source and convert it again. Everything else about a camera or editor recording is the easy case: one video track, one steady stream of frames. Almost every MP4 in the wild is H.264 video with AAC audio; the container also legally holds HEVC, AV1 and VP9.
The MP4 came from a web page — can that be turned into a WebP?
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Yes, once you have the file itself. An MP4 is what the web uses for inline video precisely because browsers play it with no plugin, so the clip playing in a tab is usually a plain MP4 that saves and uploads here like any other file. The exception is a streaming player that hands out short numbered segments rather than one file — those have to be reassembled before anything can be converted. Rights are the other thing worth checking: being able to download a video is not the same as being allowed to republish an animation made from it. MP4 is the safest possible delivery target — every phone, browser, console, editor and Smart TV built in the last decade plays it without extra software.
Will the WebP animation play audio from the MP4?
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No — animated WebP formats (GIF, WebP, APNG) do not store audio. If you need sound, target a video container (MP4, WebM) instead of an animated image format.
Can I make the WebP animation loop forever?
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Yes. The Loop setting makes the WebP repeat forever (the default) or play once and stop. There is no setting for a specific number of repeats. The loop flag is stored in the file, and most viewers respect it.
Why does my WebP look choppy compared to the MP4 source?
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Two common causes. A lower frame rate drops frames: 15 fps from a 60 fps MP4 keeps only one frame in four, so pick a higher value in the Frame Rate setting. And GIF is limited to 256 colours, so gradients dither visibly; animated WebP keeps full colour.
Can I crop or resize the MP4 before making the WebP?
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Yes — the resize option scales the MP4 down before frame extraction, which dramatically shrinks WebP file size. A 480p WebP from a 4K MP4 is roughly 16x smaller than a 4K WebP. Use /video-cutter/ for cropping in a separate step.
Is my MP4 video private during WebP animation creation?
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Yes. Uploaded MP4 files are processed on our own conversion servers, no person reviews them, and they are never shared. The upload and the converted WebP are both deleted automatically about 24 hours after the conversion, which leaves time to download the result. See /privacy/ for the full policy.
How long does converting a 10-second MP4 into WebP take?
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Animated WebP encoding is CPU-bound and slower than typical video re-encode — expect roughly 1x source duration. A 10-second MP4 → WebP finishes in about 10 seconds; a 30-second clip in about 30. GIF is slightly slower than animated WebP due to palette computation.
