WebM Converter
The royalty-free web format, which Apple hardware is slow to support.
Up to 50 MB per file. Sign up free to convert files up to 100 MB.
| File name | Size | Convert to |
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Checking files and selected output formats.
How to convert WebM files online
Convert open-source WebM video to widely supported formats for playback beyond the browser.
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1
Upload your WebM files
Drag and drop WebM files recorded in browsers, downloaded from websites, or exported from open-source tools. VP8, VP9, and AV1 video codecs within WebM containers are all handled.
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2
Choose a universal format
Select MP4 for playback on every device including iPhones and smart TVs, MOV for Apple editing workflows, or AVI for legacy software. The converter re-encodes VP8/VP9 to H.264 for maximum compatibility.
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3
Download device-ready video
Download your converted video ready to play on any device or media player. Audio is converted from Opus or Vorbis to AAC for broad hardware support. Files are auto-deleted within 1 hour.
Video Format Comparison
Choose the right output format when converting WEBM video files.
| Format | Compression | File size | Compatibility | Best For |
|---|---|---|---|---|
| MP4 | H.264/H.265 | Small–medium | Universal | Sharing, streaming, social media |
| MOV | H.264/ProRes | Medium–large | Apple, QuickTime | Mac editing, iPhone recordings |
| MKV | Multiple codecs | Large | PC, media players | High-quality archiving, subtitles |
| WebM | VP8/VP9 | Small | Web browsers | Web embedding, HTML5 video |
| AVI | Various | Large | Windows, legacy devices | Legacy compatibility, editing |
Reasons to convert WebM videos
WebM plays well in browsers but not on many hardware devices. iPhones, smart TVs, and car entertainment systems often lack VP8/VP9 support. Convert WebM to MP4 for universal device playback.
Many social platforms reject WebM uploads or transcode them poorly. Convert WebM to MP4 before uploading to Instagram, TikTok, Facebook, or LinkedIn for the best processing results.
Most video editors have limited WebM import support. Convert WebM to MP4 or MOV for smooth editing in Premiere Pro, Final Cut Pro, DaVinci Resolve, or iMovie with full timeline support.
VP8 and VP9 lack hardware decoder support on many devices, causing high CPU usage and battery drain. MP4 with H.264 is hardware-accelerated on virtually every phone, tablet, and computer.
WebM often contains Opus or Vorbis audio that some players cannot decode. Convert to MP3 or AAC for universal audio playback, or to FLAC if the original Opus stream was high bitrate.
Convert WEBM video online, no desktop apps, no plugins. Files up to 100 MB are always free, and all videos are deleted from our servers within 1 hour.
About the WebM Format
WebM is an open-source multimedia container format launched by Google in 2010 as a royalty-free alternative to proprietary video formats. Built on the Matroska container, WebM pairs VP8, VP9, or AV1 video codecs with Vorbis or Opus audio codecs. It was designed from the ground up for efficient HTML5 web video delivery, offering smaller file sizes and faster loading times than many traditional video formats while maintaining high visual quality.
WebM is optimized for web streaming and is supported natively by all major modern browsers including Chrome, Firefox, Edge, and Opera. Its open-source, royalty-free licensing makes it particularly attractive for platforms that need to serve video at scale without codec licensing fees. The main limitation is that WebM has less support on native device players and older hardware compared to MP4, making it best suited for web-first video distribution rather than offline or cross-device playback.