OGG · Opus
OGG to text: transcribe an OGG or Opus audio file
An OGG file is a container for Vorbis or Opus audio, and OGG to text needs no conversion: drop the .ogg, .oga or .opus file on this page and the speech comes back as a transcript with a timestamp on every line, ready to export as TXT, SRT or VTT, free for a first recording of up to 10 minutes. AMR files are the exception: they are not accepted.
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On this page
How to convert OGG to text
Four steps in the browser turn the recording into text, and its format stays untouched all the way.
- Locate the recording. The extension is .ogg, .oga or .opus. A message must be saved to disk first, since links and in-app playback cannot be uploaded.
- Drop it on the upload area. Drag it onto the area at the top of the page or click the area to pick it. It goes up untouched.
- Start the transcription. A guest’s first upload is transcribed right away at no charge, whole up to 10 minutes and for the first 10 minutes beyond that. Once signed in, you see the price and press Transcribe.
- Export the transcript. Download TXT or Markdown to read and edit, SRT or VTT to use as subtitles.
One voice message or a short note comes back whole and needs no account.
OGG, Vorbis and Opus: what is inside the file
OGG is only the wrapper; the sound inside is coded as Vorbis, mostly for music, or as Opus, made for speech.
| Name | What it is | Extensions |
|---|---|---|
| OGG | the wrapper around the audio stream | .ogg, .oga |
| Vorbis | an audio codec, common in games and music exports | inside .ogg or .oga |
| Opus | an audio codec for voice, used for voice messages and calls | .opus, or inside .ogg |
All three extensions are accepted, and the server reads the real contents, so a mislabeled upload is turned away with a plain message before any price appears. The overview explains how any recording is transcribed to text.
Where OGG and Opus files come from
Most people meet this format as a voice message, not as a music file.
- Telegram: voice messages are OGG containers with Opus audio.
- WhatsApp: voice messages carry Opus audio, usually saved with the .opus extension.
- Browser recorders: web tools that capture a microphone often hand you OGG or a close relative.
- Audacity and game or music exports: “Export as OGG” produces a Vorbis file.
Messages are small. At 32 kbps a minute weighs about 0.23 MB, so 100 MB holds around 436 minutes of talk, far more than a chat thread ever contains. Voice notes recorded on your own phone have their own guide.
Why Opus voice notes transcribe well, and what trips them up
Opus was designed for speech at low bitrates, so a voice note of 16 to 32 kbps keeps the consonants that recognition depends on, where an MP3 needs about 64 kbps for the same clarity.
- Short and informal: messenger notes are casual, full of half sentences and names, so read proper nouns twice.
- Noise on the street: a note recorded while walking carries wind and traffic; the timestamp shows where to listen again.
- Several voices: a note recorded at a table with friends comes out as one stream with no names attached.
- A whole chat: each message is its own recording, so a thread of twenty notes means twenty transcripts to paste together in order.
After the transcript
A transcript makes a voice message readable where you cannot press play, such as a meeting, a train or a shared office.
Export the lines as TXT to paste into a chat or a note, or as SRT and VTT if the message goes with a video. A long ramble can be reduced with AI summary of a long message into a handful of points, and the timestamps let you jump back to the exact second of a detail.
What is not accepted: AMR and 3GP
AMR files, the format of some old call recorders and phone voice notes, are not accepted, and neither are .3gp files.
The page checks the extension first and then the contents. Anything outside the list of audio and video formats gets the message “This file type is not supported.” Convert an AMR recording to MP3 or WAV with an audio converter and upload that; the guide to MP3 to text explains what happens next.
Minutes in numbers
Each audio minute uses one minute of balance, rounded up, and a first upload of up to 10 minutes is free.
- A 40-second voice message goes through free, no account needed.
- A 15-minute recorded call uses 15 minutes, more than the 10-minute sign-up gift, so a pack covers the rest.
- Size on disk does not change the price, only duration does.
The price appears before the start and is charged only after a successful transcription. The overview page lists every pack.
Limits
Expect no speaker labels, and a refusal for formats outside the list.
- No speaker labels: each line carries a timestamp, not a name.
- Only the first audio track is used.
- No AMR, no 3GP; no links to messenger chats, only saved files.
- Anything over 500 MB or 4 hours is turned away.
Frequently asked questions
How do I convert OGG to text?
Drop the .ogg on the upload area. A guest’s first upload costs nothing, whole up to 10 minutes, and the transcript has a timestamp on every line.
Can I transcribe an Opus file?
Yes. The .opus extension uploads like any other, and so does .oga. Nothing needs converting to MP3 or WAV.
Can I transcribe an AMR file?
No. The .amr extension is not on the list, and the page answers “This file type is not supported.” Convert it to MP3 or WAV in a converter first, then upload the result.
Can I transcribe a Telegram or WhatsApp voice message?
Yes, once the message is saved on disk. Telegram uses OGG with Opus audio, and WhatsApp uses Opus too, usually with the .opus extension.
Is my OGG file kept on your server?
No. The original is deleted as soon as the sound has been extracted from it, or after about an hour if the transcription never starts; only the text stays, in your browser or in your account. The privacy policy describes how files are handled.
Does it label who is speaking?
No. Every line carries a timestamp, not a speaker name, so a chat of several voice messages needs each message uploaded on its own.