Step 1: Deliver your MP4 files using the button above or by place and set.
Step 2: Click the 'Process' button to start the processing.
Step 3: Obtain your converted WebP files.
MP4 to WebP Processing FAQ
How short or long should my MP4 be for a good WebP?
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Animated WebP is best for clips under 10 seconds. Longer than that and the file balloons (GIF is essentially uncompressed-per-frame); for longer animations target WebP = WebP or APNG, both of which compress similarly to modern video codecs and stay reasonably sized.
What is the file size of a 5-second WebP animation from an MP4 clip?
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For animated GIF: 2-8 MB at 480p depending on motion complexity. For animated WebP: 200 KB to 1 MB at the same resolution and quality — animated WebP is 5-10× more efficient than GIF for the same visual result.
Will the WebP animation have audio?
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No — animated WebP formats (GIF, WebP, APNG) do not store audio at all. If you need sound with the visuals, target a short video format (WebM or MP4) instead of WebP; modern browsers autoplay muted WebM/MP4 just like GIF.
Can I make the WebP animation loop?
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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?
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Two common causes: frame-rate downsampling (15 fps WebP GIF from a 30 fps MP4 source — fix with the frame-rate option) and palette quantization on GIF (only 256 colours, so smooth gradients band — switch the WebP target to WebP or APNG for full colour fidelity).
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 file size. A 480p WebP from a 4K MP4 is 16× smaller than a 4K WebP at the same fps. Crop is handled by a separate /trim-video/ + /resize-video/ pre-step.
Is my MP4 private during WebP conversion?
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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 the MP4 to WebP conversion take?
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It depends on the size and length of the file. Small documents and images are usually ready quickly. Long videos take the longest, because most video conversions re-encode every frame.
Does the WebP preserve transparency from the MP4?
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Animated GIF supports single-colour transparency only (a binary mask, one transparent index per frame). Animated WebP and APNG support full 8-bit alpha. MP4 sources that have no alpha channel — most camera footage and most screen captures — produce fully-opaque WebP regardless of which target format you pick.
Can I share the WebP on Discord, Slack, or Twitter?
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Animated WebP GIF is universally supported on every platform. Animated WebP plays on Twitter, Discord, and modern browsers but not on iMessage or older Slack clients. If maximum compatibility matters, pick GIF; if file size matters more, pick WebP.
