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Opus to text converter

Read an .opus voice note or recording as text. Free accounts read the first 15 min of each file.

OPUS · MP3 · M4A · WAV · FLAC · OGG · OGA · WebM · AAC · AMR · SPX · MP4 · MOV · MKV

Free: read the first 15 min of each file · up to 5 h · 512 MB

Privacy policy

Sample output

00:00 Maya Thanks for joining. Let's start with the launch date.

00:04 Daniel Design is done, but the store listing still needs screenshots.

00:10 Maya Can we have those by Friday?

00:13 Daniel Yes, if marketing sends the final copy tomorrow.

00:18 Priya I'll send it tonight.

00:21 Maya Great. Then the launch date stays where it is.

The team keeps the launch date. Design is finished, and the store screenshots will be ready by Friday once marketing sends the final copy, which Priya sends tonight.

  1. 00:00 Launch date
  2. 00:10 Store screenshots by Friday
  3. 00:18 Final copy tonight
1
00:00:00,000 --> 00:00:03,600
Maya: Thanks for joining. Let's start with the launch date.

2
00:00:04,000 --> 00:00:09,200
Daniel: Design is done, but the store listing still needs screenshots.

3
00:00:10,000 --> 00:00:12,100
Maya: Can we have those by Friday?

4
00:00:13,000 --> 00:00:17,400
Daniel: Yes, if marketing sends the final copy tomorrow.

5
00:00:18,000 --> 00:00:19,800
Priya: I'll send it tonight.

6
00:00:21,000 --> 00:00:24,500
Maya: Great. Then the launch date stays where it is.
  • A transcript with timestamps and speaker labels you can rename
  • Speech in 55 languages, or automatic language detection
  • An AI summary and chapters you can jump between
  • Download as TXT, SRT, VTT, Word (DOCX), with subtitles timed to the spoken words
  • Video files too: only the audio track uploads
  • Filler words and repeats removed or kept, your choice

Need the full recording?

  • The whole transcript of every file, not only the first 15 min
  • 50 h of file transcription a month, with no daily file limit
  • Downloads of the whole transcript as TXT, SRT, VTT, Word (DOCX)

$15.99 a month, or $12.99 a month billed yearly

View Sync Pro plans

How it works

  1. Save the voice message or recording as an .opus file.
  2. Choose it here, set the spoken language and press Transcribe.
  3. Read the Opus transcript in your library.

Why so many voice messages are Opus

Opus is an audio codec designed for speech and music sent over the internet. It sounds clear at very low bitrates, which is why messaging apps rely on it: WhatsApp has recorded its voice messages in Opus for years, and many other chat and calling apps do the same.

Because the files are so small, even a long voice note or a recorded call takes only a tiny share of the 512 MB limit. The length limit of 5 h is the one that matters, and very few voice messages come anywhere near it. If a voice note is part of a longer conversation, upload each note on its own; every file becomes its own transcript in your library.

Opus audio is not always saved with an .opus ending. Some apps and phones store the same audio in an OGG container with an .ogg or .oga extension, and browser recorders put it inside WebM. All of these upload here without conversion, so there is no need to turn a voice note into MP3 first.

Free vs Sync Pro

FreeSync Pro
Readable transcriptFirst 15 min of each fileThe whole transcript
Transcription hours6 h in total50 h of uploads a month
Files per dayUp to 10No daily file limit
Longest and largest file5 h · 512 MB5 h · 512 MB
DownloadsTXT, SRT, VTT, Word (DOCX), first 15 minTXT, SRT, VTT, Word (DOCX)
PriceFree$15.99 a month, or $12.99 a month billed yearly

See Sync Pro pricing

Questions

What is an .opus file in WhatsApp?

It is a voice message. WhatsApp records voice notes with the Opus codec, and when you save or export one, the file often ends in .opus. You can upload it here as it is and read it as text.

Is Opus the same as OGG?

Not exactly. Opus is the codec that compresses the sound, and OGG is a container that often carries it. Files ending in .opus, .ogg or .oga all upload here and are transcribed the same way.

Does it work for short voice notes?

Yes. Short clips work like any other file, and each one uses free hours equal to its length. If you have many short notes, keep in mind that the free plan allows up to 10 files a day.

Can I transcribe Opus files for free?

You can start free. Your account has 6 h of transcription in total, and on the free plan you read the first 15 min of each transcript, which covers most voice messages in full.

Opus to text converter

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