OPUS to WEBM Converter
Convert OPUS files to WEBM in seconds, right in your browser. Drop in one file or a whole folder, pick your quality settings and download - nothing is uploaded to a server.
Drop OPUS files here
MP3, WAV, FLAC, M4A, OGG, OPUS, AAC, AIFF, WMA, AMR, MP4, MOV & more · Processed on your device - nothing is uploaded
How to convert OPUS to WEBM
- Click "Choose files" or drag your OPUS files onto the page.
- Make sure "WEBM" is selected as the output format (128 kbps is a good default).
- Optionally click Edit to trim, adjust volume or add effects.
- Click Convert, then Download your WEBM files.
Why convert OPUS to WEBM?
WEBM may be better supported by your device or app. To keep quality, choose a bitrate equal to or higher than the original OPUS.
WEBM is best for web apps, HTML5 audio and browser-based recording. Chrome, Firefox, Edge, Android, VLC. Safari 15+.
Will I lose quality?
Converting between two lossy formats re-encodes the audio, which can add a small amount of loss. Use a bitrate at least as high as the original (192 kbps or more) to keep it transparent.
OPUS vs WEBM
| OPUS | WEBM | |
|---|---|---|
| Full name | Opus Interactive Audio Codec | WebM Audio (Opus) |
| Type | lossy | lossy |
| Best for | voice notes, WhatsApp/Discord audio, podcasts and streaming at small sizes | web apps, HTML5 audio and browser-based recording |
| Typical size | ~0.9 MB at 128 kbps per minute | ~0.9 MB at 128 kbps per minute |
| Compatibility | All modern browsers, Android, iOS 17+, WhatsApp, Discord, Telegram and VLC. | Chrome, Firefox, Edge, Android, VLC. Safari 15+. |
| Developed by | IETF / Xiph.Org (2012) | Google (2010) |
OPUS to WEBM: questions
How do I convert OPUS to WEBM?
Open this page, add your OPUS file, make sure WEBM is selected as the output format and click Convert. Your WEBM file is ready to download in seconds.
Will converting OPUS to WEBM lose quality?
Converting between two lossy formats re-encodes the audio, which can add a small amount of loss. Use a bitrate at least as high as the original (192 kbps or more) to keep it transparent.
Is this OPUS to WEBM converter free and safe?
Yes. It's free with no watermark or sign-up. Files are processed locally in your browser, so your audio is never uploaded or stored on our servers.
Can I convert many OPUS files to WEBM at once?
Yes - add up to 5 files at a time on the free plan (unlimited with Pro), convert them all with one click and download them as a ZIP.
What is the difference between OPUS and WEBM?
OPUS (Opus Interactive Audio Codec) is a compressed (lossy) format, the most efficient modern lossy codec. Opus delivers excellent quality at very low bitrates for both speech and music. WEBM (WebM Audio (Opus)) is a compressed (lossy) format: opus audio in a WebM container - the native format of browser recordings and YouTube audio streams.
Does it work on Mac, Windows, iPhone and Android?
Yes. The OPUS to WEBM converter runs in any modern browser - Chrome, Safari, Edge or Firefox - on desktop and mobile. No software to install.