Convert MP4 to WebM
Convert your MP4 videos to WebM format, the open standard for HTML5 video on the web.
Convert MP4 → WebM now →How to convert MP4 to WebM
- Click "Convert MP4 → WebM now"
- Drag and drop or select your MP4 file
- Choose WebM as the output format
- Download your WebM video
What is WebM format?
WebM is an open, royalty-free media format developed by Google, specifically designed for web video streaming. Unlike MP4, which uses patented codecs (H.264/AAC), WebM uses VP9 and Vorbis — open-source codecs that can be used without licensing fees. WebM files are typically 30–40% smaller than equivalent MP4 files at the same quality level.
Frequently asked questions
Why convert MP4 to WebM?
WebM is an open-source video format optimized for web streaming. It is natively supported by Chrome, Firefox, and Edge without any plugin — making it ideal for HTML5 video elements.
What codec does CoreConverter use for WebM?
CoreConverter uses VP9 for video and Vorbis for audio, which offers an excellent balance of quality and file size.
Is WebM supported by all browsers?
WebM is supported by Chrome, Firefox, Edge, and Opera. Safari added WebM support in Safari 14.1. For maximum compatibility, consider keeping the MP4 as a fallback.
Will the audio be preserved in the WebM file?
Yes. The audio track is transcoded to Vorbis and included in the WebM output.
What is the maximum file size?
Up to 50 MB on the free plan. Pro users can convert files up to 500 MB.
Are my files deleted after conversion?
Yes. All files are automatically deleted 24 hours after conversion.
Why convert MP4 to WebM?
WebM is an open-source video format optimized for web streaming. It is natively supported by Chrome, Firefox, and Edge without any plugin — making it ideal for HTML5 video elements.
What codec does CoreConverter use for WebM?
CoreConverter uses VP9 for video and Vorbis for audio, which offers an excellent balance of quality and file size.
Is WebM supported by all browsers?
WebM is supported by Chrome, Firefox, Edge, and Opera. Safari added WebM support in Safari 14.1. For maximum compatibility, consider keeping the MP4 as a fallback.
Will the audio be preserved in the WebM file?
Yes. The audio track is transcoded to Vorbis and included in the WebM output.
What is the maximum file size?
Up to 50 MB on the free plan. Pro users can convert files up to 500 MB.
Are my files deleted after conversion?
Yes. All files are automatically deleted 24 hours after conversion.
Why convert MP4 to WebM?
WebM is an open-source video format optimized for web streaming. It is natively supported by Chrome, Firefox, and Edge without any plugin — making it ideal for HTML5 video elements.
What codec does CoreConverter use for WebM?
CoreConverter uses VP9 for video and Vorbis for audio, which offers an excellent balance of quality and file size.
Is WebM supported by all browsers?
WebM is supported by Chrome, Firefox, Edge, and Opera. Safari added WebM support in Safari 14.1. For maximum compatibility, consider keeping the MP4 as a fallback.
Will the audio be preserved in the WebM file?
Yes. The audio track is transcoded to Vorbis and included in the WebM output.
What is the maximum file size?
Up to 50 MB on the free plan. Pro users can convert files up to 500 MB.
Are my files deleted after conversion?
Yes. All files are automatically deleted 24 hours after conversion.
Why convert MP4 to WebM?
WebM is an open-source video format optimized for web streaming. It is natively supported by Chrome, Firefox, and Edge without any plugin — making it ideal for HTML5 video elements.
What codec does CoreConverter use for WebM?
CoreConverter uses VP9 for video and Vorbis for audio, which offers an excellent balance of quality and file size.
Is WebM supported by all browsers?
WebM is supported by Chrome, Firefox, Edge, and Opera. Safari added WebM support in Safari 14.1. For maximum compatibility, consider keeping the MP4 as a fallback.
Will the audio be preserved in the WebM file?
Yes. The audio track is transcoded to Vorbis and included in the WebM output.
What is the maximum file size?
Up to 50 MB on the free plan. Pro users can convert files up to 500 MB.
Are my files deleted after conversion?
Yes. All files are automatically deleted 24 hours after conversion.
Are my files deleted after conversion?
Yes. All files are automatically deleted 24 hours after conversion.
What is the maximum file size?
Up to 50 MB on the free plan. Pro users can convert files up to 500 MB.
Will the audio be preserved in the WebM file?
Yes. The audio track is transcoded to Vorbis and included in the WebM output.
Is WebM supported by all browsers?
WebM is supported by Chrome, Firefox, Edge, and Opera. Safari added WebM support in Safari 14.1. For maximum compatibility, consider keeping the MP4 as a fallback.
What codec does CoreConverter use for WebM?
CoreConverter uses VP9 for video and Vorbis for audio, which offers an excellent balance of quality and file size.
Why convert MP4 to WebM?
WebM is an open-source video format optimized for web streaming. It is natively supported by Chrome, Firefox, and Edge without any plugin — making it ideal for HTML5 video elements.
Are my files deleted after conversion?
Yes. All files are automatically deleted 24 hours after conversion.
What is the maximum file size?
Up to 50 MB on the free plan. Pro users can convert files up to 500 MB.
Will the audio be preserved in the WebM file?
Yes. The audio track is transcoded to Vorbis and included in the WebM output.
Is WebM supported by all browsers?
WebM is supported by Chrome, Firefox, Edge, and Opera. Safari added WebM support in Safari 14.1. For maximum compatibility, consider keeping the MP4 as a fallback.
What codec does CoreConverter use for WebM?
CoreConverter uses VP9 for video and Vorbis for audio, which offers an excellent balance of quality and file size.
Why convert MP4 to WebM?
WebM is an open-source video format optimized for web streaming. It is natively supported by Chrome, Firefox, and Edge without any plugin — making it ideal for HTML5 video elements.
Are my files deleted after conversion?
Yes. All files are automatically deleted 24 hours after conversion.
What is the maximum file size?
Up to 50 MB on the free plan. Pro users can convert files up to 500 MB.
Will the audio be preserved in the WebM file?
Yes. The audio track is transcoded to Vorbis and included in the WebM output.
Is WebM supported by all browsers?
WebM is supported by Chrome, Firefox, Edge, and Opera. Safari added WebM support in Safari 14.1. For maximum compatibility, consider keeping the MP4 as a fallback.
What codec does CoreConverter use for WebM?
CoreConverter uses VP9 for video and Vorbis for audio, which offers an excellent balance of quality and file size.
Why convert MP4 to WebM?
WebM is an open-source video format optimized for web streaming. It is natively supported by Chrome, Firefox, and Edge without any plugin — making it ideal for HTML5 video elements.
Are my files deleted after conversion?
Yes. All files are automatically deleted 24 hours after conversion.
What is the maximum file size?
Up to 50 MB on the free plan. Pro users can convert files up to 500 MB.
Will the audio be preserved in the WebM file?
Yes. The audio track is transcoded to Vorbis and included in the WebM output.
Is WebM supported by all browsers?
WebM is supported by Chrome, Firefox, Edge, and Opera. Safari added WebM support in Safari 14.1. For maximum compatibility, consider keeping the MP4 as a fallback.
What codec does CoreConverter use for WebM?
CoreConverter uses VP9 for video and Vorbis for audio, which offers an excellent balance of quality and file size.
Why convert MP4 to WebM?
WebM is an open-source video format optimized for web streaming. It is natively supported by Chrome, Firefox, and Edge without any plugin — making it ideal for HTML5 video elements.