WhatsApp voice message or recorded meeting: how to turn it into text in minutes (and what not to send to AI)

By Marcelo Amantino · published October 5, 2026 · updated October 21, 2026 · 3 min read · who we are

A four-minute WhatsApp voice message you cannot listen to right now. A one-hour meeting someone has to write the minutes for. An interview you recorded and now need to quote. Transcribing by hand takes several times the length of the recording; with AI, it takes minutes. But there are two cautions almost nobody mentions: the audio quality decides the text quality, and, with this tool, the audio has to be sent to an external service. This guide covers both.

WhatsApp audio, meetings, interviews: what can be transcribed

WebFaz Transcription accepts audio files (such as MP3, WAV, M4A and OGG) and also video files (MP4, MOV, WEBM and others): when it is a video, the audio is extracted automatically. You can also speak into the microphone and watch the text appear in real time; in that mode, the text does not mark the time of the lines. WhatsApp audio is usually saved in the app’s own formats; if the file you have does not open, convert it first with Audio Converter.

Before transcribing: what the recording needs

The model transcribes what it can hear. Better audio avoids most mistakes:

Record close to the speaker and in the quietest environment possible.
Avoid background music and a fan or air conditioner near the microphone.
In meetings with several people, ask them to speak one at a time: overlapping voices turn into truncated passages.
Test the recording for a few seconds before you start.

Step by step to transcribe

Open Transcription and choose the language before uploading (the transcription starts as soon as you select the file). If you prefer, let the app detect the language.
Upload the audio or video file, or record with the microphone.
Wait for processing; longer audio takes more time.
Read the text and fix proper names, acronyms and technical terms, which is where the AI makes the most mistakes.
Copy the result or use “Send to…” to take it to another WebFaz tool.

Daily limit and large files

The page shows how many minutes of audio you still have for the day in this browser (the limit is 30 minutes per day), before you upload. For longer recordings, split the audio into parts. If a meeting was recorded as video and the file is heavy, you can extract only the sound with Audio Extraction before uploading.

The care needed with sensitive data

Most WebFaz tools run entirely in the browser, but transcription is an exception: a good-quality AI model does not run well in the browser of an ordinary phone or computer. So, to transcribe, the audio is sent to the speech recognition service (Groq, with the Whisper Large-v3 model). WebFaz does not store the audio, and the page tells you this before use. There are more details on the Privacy page and a general explanation in why processing files in the browser is more private.

Before sending a recording, it is worth asking:

Does the conversation contain confidential information, client data, health data or business secrets?
Are there company, contract or professional secrecy rules that forbid sending this recording to an external service?
Do the participants know the conversation was recorded? Telling them is good practice and, depending on the case, a requirement.

When not to use it

If the recording is confidential and cannot leave your control, prefer transcribing manually or using a solution your organization has already approved. Automatic transcription also does not replace an official record: it does not identify who is speaking and can make mistakes in passages with noise, strong accents or technical terms.

From raw text to good minutes (or subtitles)

The raw text is a starting point. To get to useful minutes:

Fix names, job titles and numbers by listening to doubtful passages in the original audio.
Separate by topic and highlight decisions, owners and deadlines.
Delete what does not need to be recorded, such as side conversations.

What if the goal is to subtitle a video?

If what you want is subtitles and not just text, the path is different: the video editor generates automatic subtitles for review, and the Subtitles converter lets you fix the timing, convert the format and translate. See the step by step in how to fix, convert and translate subtitles.