Step 1: Submit your MP4 files using the button above or by pull and release.
Step 2: Click the 'Transform' button to start the transformation.
Step 3: Save your converted WebP files.
MP4 to WebP Transformation FAQ
How short / 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 (animated GIF is uncompressed-per-frame); use WebP or APNG for longer animations, both of which compress similarly to video codecs.
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 / quality — animated WebP is 5-10x more efficient than GIF.
Will the WebP animation have audio?
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No — animated WebP formats (GIF, WebP, APNG) do not store audio. If you need sound, target a video format (MP4, WebM) instead of WebP.
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 GIF vs 30 fps source — fix with the frame-rate option) and palette quantization on GIF (only 256 colors — switch to animated WebP for full color fidelity).
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-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.
Can I share the WebP on Discord / Slack / Twitter?
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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.
