About .opus files
Opus at even low bitrates keeps speech intelligible, and transcription quality holds up. Discord recordings and VoIP call exports are typically Opus.
Where .opus files come from
Discord calls, VoIP recordings, messaging-app audio.
What you get
Speaker labels
Multi-voice recordings come back with each speaker separated and labelled.
Word-level timestamps
Every word is timed — accurate SRT/VTT subtitles come straight out.
100+ languages
The language is auto-detected; mixed-language recordings are handled per sentence.
Every export
TXT, SRT, VTT, DOCX and JSON on every pack — no format paywall.
Questions people ask
Do I need to convert .opus to MP3 first?
No. Upload the .opus file exactly as it is — decoding happens server-side, and lossless or original-codec input transcribes better than a re-compressed MP3 anyway.
Is there a size or length limit for .opus files?
Files up to 10 hours each are accepted, and multi-gigabyte uploads resume if your connection blips.
How much does it cost?
The preview is instant with no signup. Credits are one-time purchases that never expire: $4 for 300 minutes, $12 for 2,000 minutes (about 36¢ per hour of audio).
Can I paste a link instead of uploading?
Yes — paste a direct link or a page URL and the audio is fetched server-side, which is faster than uploading from a slow connection.
Related: Audio to text · MP3 to text · Video to text · Subtitle generator