Convert WebM to MP4 online with Vimeo

Drop a WebM file into Vimeo and get an MP4 with H.264 video, AAC audio, adaptive streaming for every device, and a downloadable file with no watermark. Vimeo works as a browser-based WebM to MP4 converter, so there is nothing to install, no codec pack to hunt down, and no VP9 compatibility headaches.
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WebM plays in some browsers, then quietly fails everywhere else

  • Safari and iOS refuse to play WebM

    WebM was built for Chrome and Firefox using VP8 or VP9 video. Apple's browsers do not decode either codec, so a WebM that plays fine on your laptop breaks the moment an iPhone or iPad user opens the link.

  • Connected TV apps expect MP4

    Apple TV, Roku, Fire TV, and most smart TV platforms need MP4 with H.264. WebM files rarely play on connected TV without a re-encode, which is a problem for anyone shipping video to the living room.

  • Editors and clients ask for MP4

    Adobe Premiere Pro, Final Cut Pro, and DaVinci Resolve all handle MP4 cleanly; VP9 WebM is a second-class citizen at best. Send a WebM to a client or editor and you will usually get asked for an MP4 within an hour.

WebM is a web-optimized container built for browser playback using VP8 or VP9 codecs. It streams efficiently inside modern web apps, which is why so many screen recorders and browser tools export to it. The trade-off shows up the moment the video leaves that context. Safari and iOS do not play WebM natively, most connected TV apps do not accept it, and downstream editors would rather have MP4. Whenever the goal is to reach a broader audience or hand off to a client, MP4 is the safer target format.

Upload WebM, get an MP4 that plays and downloads clean

Upload a WebM file to Vimeo and the VP8 or VP9 source is transcoded to an MP4 with H.264 video and AAC audio. The result plays on Safari, Chrome, Firefox, Edge, iOS, Android, and any connected TV that supports MP4. You get an ad-free player, a shareable link, and a downloadable MP4 with no watermark on any plan. Replace the source WebM later and the MP4 regenerates on the same URL.
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Automatic WebM to MP4 conversion

The transcode runs during upload processing. There is no convert button, no codec pack to install, and nothing to configure. Upload the WebM and the MP4 is ready when processing finishes.

H.264 and AAC in the MP4 container

Vimeo outputs the industry-standard pairing: H.264 video with AAC-LC audio. That combination plays natively on Safari, Chrome, Firefox, Edge, iOS, Android, and most connected TV devices.

Downloadable compressed MP4

Grab the MP4 from the video settings for reuse in Premiere Pro, Final Cut Pro, DaVinci Resolve, an LMS, or any platform that accepts standard MP4 uploads.

No watermark on the output

The converted MP4 plays and downloads clean on every plan, including the Free tier. No promotional overlay, no branded intro, and no "converted with" mark on the file.

Watch the converted MP4 with adaptive streaming

Vimeo generates a full ladder of renditions from the WebM source, up to 8K HDR when it supports it, down to a mobile-friendly 360p at the bottom. The player picks the right rendition per viewer in real time. On paid plans, Vimeo auto-generates captions in 99 languages, so the converted MP4 comes with a subtitle track without a separate captioning pass.
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Up to 8K HDR quality

Hosting supports 4K, 8K, HDR, and Dolby Vision when the WebM source carries them. Nothing gets downscaled to hit a resolution cap.

Adaptive bitrate per viewer

The player switches renditions based on the viewer's connection. A slow network sees a lower tier instead of a spinner.

Ad-free playback on every plan

No pre-rolls, mid-rolls, post-rolls, or up-next recommendations, whether you are on Free or Enterprise. What plays is your video.

Responsive iframe embeds

Embed the player on WordPress, Squarespace, Webflow, Ghost, HubSpot, Shopify, or a custom site with a responsive iframe that resizes cleanly on mobile.

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Why converting WebM to MP4 is worth doing once and reusing everywhere

WebM is a browser format; MP4 is the universal format. Converting WebM to MP4 through H.264 compression turns a file that only plays in Chrome and Firefox into one that works everywhere: Safari, iOS, connected TV, and every major editor. Teams working with WebM output from screen recorders or browser tools can use Vimeo's bulk upload and public API to convert whole catalogs.

  • Plays on Safari and iOS

    MP4 with H.264 plays natively where WebM does not. That alone unlocks the Apple half of your audience.

  • Ready for connected TV

    Apple TV, Roku, and Fire TV apps expect MP4. The converted file drops into a TV app pipeline without another re-encode.

  • Editor-friendly output

    Adobe Premiere Pro, Final Cut Pro, and DaVinci Resolve handle H.264 MP4 better than VP9 WebM. Editors stop asking for a different format.

  • iframe embed on any site

    Works on WordPress, Squarespace, Webflow, Ghost, HubSpot, Shopify, and custom builds through a single embed code.

  • Shareable link

    Paste the Vimeo link into Slack, Microsoft Teams, email, or a doc. Viewers open it in the browser and play. No plugin required.

  • Downloadable MP4

    Pull the compressed MP4 from the video settings for reuse in another editor, an LMS, or a partner platform. Pick the resolution at download.

  • Batch upload for volume

    Bulk upload processes WebM files in batches with the same H.264 compression applied to each. Useful when a screen recording archive needs converting.

  • API-driven conversion

    The Vimeo public API and webhooks let you upload WebM from a build pipeline and pull the MP4 or embed code back the moment processing finishes.

  • Stable URLs across replacements

    Replace a WebM source with an updated version and the MP4 regenerates on the same URL. Existing embeds keep working; no page updates required.

How to convert WebM to MP4 with Vimeo

WebM to MP4 conversion happens as part of the upload flow on Vimeo. Sign in, drop the WebM file into your workspace, and Vimeo transcodes to MP4 in the background. You can share, embed, or download the result the moment processing finishes.

  1. Step 1

    Sign in to Vimeo. A Free account converts WebM to MP4; paid plans add auto-captions in 99 languages, more storage, and analytics.

  2. Step 2

    Click New video and upload the WebM file. Drag and drop from the desktop works, or select the file from your Mac, Windows PC, or Chromebook.

  3. Step 3

    Wait for processing. Vimeo transcodes to H.264 MP4 with AAC audio automatically and builds out the full rendition ladder for adaptive streaming.

  4. Step 4

    Open the video's Settings, choose Video file, and download the MP4 at the resolution you want. Or copy the share link, or grab the iframe embed.
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Find the right plan for you

    Vimeo offers discounts to US-based non-profit organizations and educational institutions. Learn more.

    For more information on feature availability, please reference our pricing page.

    Frequently asked questions about converting WebM to MP4

    Yes. Vimeo's Free plan accepts WebM uploads, transcodes to MP4, and lets you play, share, and download the result within the 1 GB total account storage. Paid plans add more storage, auto-captions in 99 languages, custom branding, and analytics, but the WebM to MP4 conversion itself does not cost extra on any tier.

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