How to convert WebM to Opus
- 1
Upload your file
Drag and drop a file or click to select one. Keep this page open while the file uploads and converts.
- 2
Convert WebM to Opus
NexMedia converts WebM to Opus on its own servers. Processing time depends on the file size and how busy the queue is.
- 3
Download the converted file
When the conversion finishes, the download appears on this page. Your converted file is kept for 2 hours, then deleted.
About WebM
WebM is an open, royalty-free video format developed by Google and based on the Matroska container. It holds VP8, VP9 or AV1 video with Vorbis or Opus audio.
It is made for the web: all major browsers play it in the HTML video element, and it is common for screen recordings and short clips.
WebM allows only its own small set of codecs, so H.264 video or AAC audio has to be re-encoded to fit.
Convert WebM to Opus online free, no account required — Opus is a modern open lossy codec for speech and music.
Change WebM to Opus without losing quality — convert WebM to Opus free in your browser.
Why can't I upload my WebM video to Instagram or TikTok? Social apps almost always demand MP4, so a WebM made for the web needs converting before it will upload.
About Opus
Opus is an open, royalty-free lossy audio codec standardised by the IETF in 2012 (RFC 6716). It handles both speech and music well, from very low to high bitrates.
Voice and video calls, WhatsApp voice messages, WebRTC, and the audio track of WebM videos.
Opus always decodes at 48 kHz, and some older players and devices do not support it.
Why convert voice recordings to Opus? It stays clear at very low bitrates, so calls and dictation shrink dramatically without becoming hard to understand.
What changes when you convert WebM to Opus
- The soundtrack of the WebM is re-encoded as Opus at the default settings, so it is close to the original but not bit-identical.
- Only the sound is kept: the Opus file contains the audio track of your WebM, and the picture is dropped.
Settings you can change
Before you convert WebM to Opus, you can adjust: Audio codec, Rate control, Audio bitrate, Quality (VBR), Sample rate, Channels, Normalize loudness, Trim start, Trim duration, and Keep tags.
Limits
Each plan sets a maximum file size and a number of conversions per day, and video and audio files also have a maximum length. Guests can convert files up to 100 megabytes and 5 per day; a free account raises this to 500 megabytes and 25 per day; paid plans go up to 100 gigabytes.
Your converted Opus file is kept for 2 hours, then deleted.
WebM to Opus: questions and answers
Does converting WebM to Opus reduce quality?
The soundtrack of the WebM is re-encoded as Opus at the default settings, so it is close to the original but not bit-identical.
What is the difference between WebM and Opus?
WebM is an open, royalty-free web video format with VP8, VP9 or AV1 video and Opus or Vorbis audio. Opus is a modern open lossy codec for speech and music.
Can I change the settings when converting WebM to Opus?
Before you convert WebM to Opus, you can adjust: Audio codec, Rate control, Audio bitrate, Quality (VBR), Sample rate, Channels, Normalize loudness, Trim start, Trim duration, and Keep tags.
Do I need an account to convert WebM to Opus?
No. You can convert WebM to Opus without an account; signing in raises the file-size and daily limits.
How long is my converted Opus file kept?
The Opus file you convert from WebM is kept for 2 hours, then deleted automatically.
When I convert WebM to Opus, can I keep just the sound?
Only the sound is kept: the Opus file contains the audio track of your WebM, and the picture is dropped.
Will converting WebM to Opus change my original file?
No. The conversion reads your WebM and writes a new Opus file, leaving your original WebM file untouched.