Convert OPUS to SPX
Fast, free OPUS to SPX conversion — works in any browser
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opus
Opus — Open Audio Codec for Voice and Music
| File extension | .opus |
|---|---|
| File category | audio |
| Programs | VLC media player foobar2000 MPV Audacity Firefox |
| Tech description | https://en.wikipedia.org/wiki/Opus_(audio_format) |
| MIME type | audio/ogg; codecs=opus audio/opus |
| Developer | Xiph.Org, IETF |
Opus is a free, open-source audio codec developed by Xiph.Org and the IETF, standardized in 2012 (RFC 6716). It supports bitrates from 6 kbps to 510 kbps, covering both low-bitrate voice calls and high-quality music streaming with a single codec. Opus consistently outperforms MP3, AAC, and Vorbis at equivalent bitrates in independent listening tests. It is used by YouTube, Spotify, Discord, WhatsApp, Zoom, and WebRTC applications. Opus is natively supported in Firefox, Chrome, Edge, and most modern media players including VLC, MPV, and foobar2000, across Windows, macOS, Linux, Android, and iOS.
spx
An audio file with recorded voice messages
| File extension | .spx |
|---|---|
| File category | audio |
| Programs | VLC media player Audacity foobar2000 MPlayer |
| Tech description | https://en.wikipedia.org/wiki/Speex |
| MIME type | audio/ogg; codecs=speex audio/x-speex |
| Developer | Jean-Marc Valin (Xiph.Org) |
This format extension is one of the Speex Audio formats. It is an open-source codec developed by Xiph.Org. Used for creating voice messages and transmitting voice over packet-based networks with a low level of security. It is an audio file with recorded voice messages that are packaged in an OGG file. Only certain media players can open it.
FAQ
How to convert SPX to OPUS?
Upload your SPX file, select OPUS as the output format, and click Convert. The converted file will be ready to download in seconds — no account or installation required.
How long does it take to convert SPX to OPUS?
Most SPX files convert in seconds. Larger files may take up to a few minutes depending on size and internet speed. You can track the progress bar in real time during conversion.
Is it safe to convert SPX files online?
Yes. All uploaded SPX files and converted OPUS results are automatically deleted from our servers within 1 hour after conversion. We do not store, share, or access your files.
Can I convert SPX on iPhone or Android?
Yes, our converter works on all devices and operating systems — iPhone, iPad, Android, Windows, and macOS. Open the site in your mobile browser, upload the SPX file and convert to OPUS without installing any app.
