WebM to MP4
Convert WebM videos to MP4 – free in browser
Why WebM → MP4?
MP4 is the most universal video format, supported by almost all devices, players, and platforms. Convert WebM to MP4 for free – directly in the browser, no upload.
Frequently Asked Questions
Why convert WebM to MP4?
MP4 is supported by far more devices and software than WebM. For maximum compatibility, MP4 is the best choice.
Are my files safe?
Yes, 100%. Your video files are never uploaded to a server. The conversion happens entirely locally in your browser.
Is the conversion free?
Yes, wandlio.de is completely free. No registration, no limits, no ads.
About MP4
MP4 (MPEG-4 Part 14) was standardized in 2001 as ISO 14496-14 and is the most widely used container format for video and audio worldwide. Based on Apple QuickTime format (MOV), MP4 can hold various codecs, most commonly H.264/AVC or H.265/HEVC for video and AAC for audio. The format supports streaming via HTTP Live Streaming (HLS) and Dynamic Adaptive Streaming (DASH), subtitles, chapters, metadata, and multiple audio and video tracks. MP4 is the standard format for YouTube, Vimeo, Netflix, and social media platforms. The broad codec support and compatibility with virtually every device and browser make MP4 the safe choice for video distribution. MP4 files can also contain pure audio (M4A) or images. The ISO Base Media File Format standard on which MP4 is based is also the foundation for 3GP, HEIF, and other container formats.
About WebM
WebM was released by Google in 2010 as a royalty-free video format for the web and is a profile of the Matroska container (MKV). WebM initially used VP8 for video and Vorbis for audio, with later versions supporting VP9 and AV1 for video and Opus for audio. The format was developed in response to the licensing issues surrounding H.264, whose MPEG-LA patents required licensing fees. YouTube automatically transcodes all uploaded videos to WebM, and the format is natively supported by Chrome, Firefox, and Edge. Safari only supported WebM starting with version 15 (2021). WebM with AV1 offers the best compression of all current web video formats but requires more computational power for encoding and decoding. For web video, WebM is the most important format alongside MP4, with MP4 offering broader compatibility and WebM representing the patent-free alternative.
Why convert WEBM → MP4?
WebM is an open video format (VP8/VP9 video + Opus/Vorbis audio) developed by Google for HTML5 video. It's supported by Chrome, Firefox, and Edge but not by Apple's Safari (before macOS 11) and not by many smart TVs, game consoles, and older media players. Converting to MP4 (usually MP4) ensures cross-platform compatibility on all devices and in all browsers. MP4 makes WebM videos universally playable. MP4 is the standard video format for web and mobile with H.264/H.265 video and AAC audio — universally compatible.