If you handle customers from a computer, you're probably already using what most people call WhatsApp Business Web: your Business account open in a browser. That's exactly where you can transcribe customer voice messages — and this guide walks the whole path, from zero, in 5 steps.
First things first: there is no separate address
A common mix-up: there is no "web.whatsappbusiness.com". WhatsApp Business Web is the same web.whatsapp.com — the difference is the phone you link. If the linked device uses a WhatsApp Business account, what opens in the browser is your commercial inbox, with labels, quick replies and everything else.
Because ZapVox is a browser extension that works on web.whatsapp.com, it behaves exactly the same with a Business account. What it doesn't do is run inside the WhatsApp Business app (phone or desktop program) — browser extensions simply don't exist there.
Before you start
- A Chromium-based browser: Chrome, Edge, Brave, Opera.
- The phone with your WhatsApp Business account at hand (to scan the QR the first time).
- Nothing else. No official API, no new number, no switching accounts.
Step by step
- Install ZapVox in your browser, from the Chrome or Edge extension store.
- Open
web.whatsapp.comand link it by scanning the QR code with your Business phone (WhatsApp Business → Menu → Linked devices → Link a device). - Reload the page once after installing the extension, so it can inject its buttons into the interface.
- Open a chat with a voice message and hover over it: the 🎙️ button appears next to the message.
- Click it. In seconds the transcription shows up below the audio, inside the chat, ready to copy.
From then on it's routine: every incoming voice message becomes text with one click, without leaving the conversation or opening another tab.
If the button doesn't show up
| Symptom | Likely cause | What to do |
|---|---|---|
| No 🎙️ button in the chat | Page was open before you installed the extension | Reload web.whatsapp.com (F5) |
| Button disappears after a while | WhatsApp Web session dropped or reconnected | Reload the page |
| Extension installed but idle | Disabled in the extensions list | Check chrome://extensions (or edge://extensions) |
| A very old voice message won't transcribe | The file is no longer cached in the browser | Play the audio once, then try again |
| I opened the WhatsApp Business app | Extensions don't run inside apps | Use the browser, at web.whatsapp.com |
Long messages or another language
Beyond transcribing, you can summarize a long voice message into a few bullets — handy for the customer who sends 6 minutes explaining the whole problem — and translate when it arrives in another language. Both act on the text already transcribed, in the same conversation.
More than one computer on the team
Each machine needs ZapVox installed in its own browser. If two or three people answer the same WhatsApp Business account from different computers, there's the Additional computer add-on at R$ 9.90 each, on top of the subscription.
Limits and price
The free plan gives 10 transcriptions a day and up to 15 minutes of audio a day, no credit card. Pro costs R$ 29.90/month (Brazilian reais) and goes to 150 transcriptions a day and up to 150 minutes of audio a day, with no watermark and summary and translation unlocked. You can test it on real conversations before subscribing.
Transcribe your Business Web voice messages in one click
Free to start — 10 transcriptions a day, no card.
Install ZapVox on ChromeFrequently asked questions
How do I open WhatsApp Business Web?
Open web.whatsapp.com in your browser and link it by scanning the QR code from the WhatsApp Business app on your phone, under Menu → Linked devices → Link a device. There is no separate address for Business: it's the same web.whatsapp.com.
Can I transcribe audio on WhatsApp Business Web?
Yes. With ZapVox installed in your browser, every voice message gets a transcription button on WhatsApp Web, including when the linked account is a Business one.
Do I need to install anything on my phone?
No. ZapVox is a browser extension and lives only on the computer. The phone is only used to keep the WhatsApp Web session linked.
The transcription button didn't appear. What now?
Reload web.whatsapp.com after installing the extension. If it still doesn't show up, check that the extension is enabled at chrome://extensions (or edge://extensions) and try playing the audio once before clicking.
Does it work in the WhatsApp Business desktop app?
No. Browser extensions only work in a browser. Use web.whatsapp.com in Chrome or Edge, linked to your Business account.