LinksConverterConvert an MP4 video into a WebM (VP9 + Opus) file — the open, royalty-free format that compresses smaller than MP4 at the same quality and is ideal for the web. Great for HTML5 video, where WebM loads fast in modern browsers.
MP4 (MPEG-4 Part 14) is the most widely supported video container on the planet. It packs H.264 or H.265 video with AAC audio into a single file that plays natively on iPhone, Android, Windows, macOS, web browsers, smart TVs, and every modern editor. Use MP4 when you need a finished, shareable video that will just work, anywhere, without re-encoding.
WEBM is an open, royalty-free video container built around the VP9 codec (or AV1) and Opus audio. It is the default format YouTube serves to modern browsers because it compresses smaller than MP4 at the same quality. The trade-off: Apple’s ecosystem and many older players still refuse to open WEBM files.
Server-side ffmpeg + yt-dlp on auto-scaling workers. Most files finish in seconds, not minutes.
Every uploaded or fetched file is virus-scanned before it ever reaches your download.
Files live on encrypted S3 storage for 2 hours, then are permanently purged. We never log file contents.
Free for up to 10 conversions per hour with no account. Pro unlocks larger files and priority queue.
Drop a MP4 file from your device, or paste a public URL pointing to the MP4 you want to convert.
The output is pre-set to WEBM. You can adjust quality or bitrate in the advanced options if you need a smaller file.
Click Convert. Our cloud workers fetch the MP4, scan it for malware, and run the MP4 → WEBM pipeline.
A one-time pre-signed link appears as soon as the WEBM is ready. The file is automatically deleted from our storage 2 hours later.
Browse other popular file conversions handled by the same pipeline.