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
How do I turn an MP4 video into an animated WebP?
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Upload the MP4 and the converter samples frames (default 15 fps), encodes them into the animated WebP container, and applies palette quantization tuned for the WebP format (GIF gets an adaptive 256-color palette; animated WebP supports full 24-bit color). MP4 is ISO/IEC 14496-14, standardised in 2001 and derived from the same QuickTime box layout MOV uses. WebP is Google’s 2010 image format, built from the VP8 keyframe encoder and intended to replace JPG, PNG and GIF at once.
How do I pick which few seconds of the MP4 to animate?
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Open it in a player, find the moment and note the timecode, because an MP4 does not normally carry chapter marks to navigate by. Paste that into the start-time field, add a duration, and the converter seeks to that point and decodes only the span you asked for. The seek is accurate to the frame, but it can only be as good as the number it is handed — check it against a preview before committing to a long clip. MP4 only supports one widely-honoured subtitle format (mov_text), and multi-track audio is unreliable outside desktop players.
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.
Should the frames in the animated WebP be lossy or lossless?
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Lossy, for anything that started as video. An animated WebP can encode its frames either way: the lossless mode keeps every pixel and suits flat graphics and screen text, while the lossy mode uses block-based prediction of the kind a video codec uses and suits real footage. Camera frames are full of fine grain and gradients that lossless compression finds no pattern in, so a lossless animation of a filmed clip can run several times the size of a lossy one that looks the same. Leave it lossy unless the source was a screen recording of crisp text. WebP is still second-class outside the browser — print workflows, older Office builds and some phone galleries do not accept it.
How short should my MP4 clip be for a clean WebP animation?
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Animated WebP works best for clips under 10 seconds. Beyond that the file balloons (GIF is essentially per-frame uncompressed). For longer animations target animated WebP or APNG, both of which use video-codec-grade compression and scale much better.
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.
Will the WebP animation have the same frame rate as the MP4?
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By default we downsample to 15 fps for animated GIF (it visually struggles above 25 fps) and 24 fps for animated WebP / APNG (which handle higher rates cleanly). Override via the frame-rate option if your viewer supports the source rate.
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-count option controls whether WebP loops infinitely (default), plays N times, or plays exactly once. The loop count is stored in the WebP container metadata and respected by every modern viewer.
Why does my WebP look choppy compared to the MP4 source?
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Two common causes. First, frame-rate downsampling: 15 fps WebP from a 60 fps MP4 drops 75% of frames; fix with the frame-rate slider. Second, palette quantization: GIF is limited to 256 colors and gradient-heavy MP4 dithers visibly. Switch to animated WebP for full-color fidelity.
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.
