ZapVox Help Center

You don't need to do anything: if you installed from the Chrome Web Store (or the Edge store), updates arrive automatically, usually within a few hours.

Closing and reopening the browser helps complete a pending update. After an update, reload WhatsApp Web (F5) so the tab uses the new version.

You can check your version in the extension popup.

Yes! Install ZapVox on as many computers and browsers as you like and sign in with the same account. You can switch between them freely — the only rule is that just 1 browser stays active at a time.

How it works: when you open ZapVox in another browser, that one becomes active and the previous one is paused, with a notice and a "Use here" button to resume whenever you want. Switch machines/browsers as often as you need — you just can't use the same account on two at the same time.

It's 1 account per active browser. Without the add-on, simultaneous use (two browsers active at the same time on the same account) is not enabled — this helps prevent fraud and account sharing.

Need more than one active browser at the same time? The Additional computer add-on costs +R$9.90/month per extra browser and is bought from your dashboard, with no need to talk to anyone. For larger teams, write to [email protected].

Yes, message scheduling is available! It's a Pro feature — on the Free plan you can schedule up to 3 messages per day.

How to schedule:

• On WhatsApp Web, open the contact's chat
• Click the 📅 button next to the microphone
• Write the message (you can use variables like {{nome}}, {{data}}, {{hora}})
• Pick a date and time and save

Sending is individual and uses WhatsApp's official chat mechanism (it is NOT bulk sending). ZapVox applies automatic safety limits (minimum interval between sends, timing variation, and hourly/daily/weekly caps) to reduce the risk of being blocked.

⚠️ Important: use it moderately. Excessive use may lead to your account being blocked by WhatsApp — that decision is exclusively Meta's and is your responsibility. Reminders (🔔 to yourself) remain free on all plans.

• Audio quality: Background noise, low volume, or poor microphone quality reduce accuracy
• Accents and dialects: Heavy accents may reduce recognition accuracy
• Language: Some languages have higher accuracy than others
• Provider: switching between Cloud and BYOK (Groq or OpenAI) can improve results — some providers handle certain audio better

• Monthly: R$29.90/month, auto-renewing
• Annual: R$229.90/year, auto-renewing (36% off versus paying monthly, about R$19.16/month)
• Biennial: R$344.90 for 2 years, a one-off payment with no auto-renewal (52% off versus paying monthly, about R$14.37/month)

• Within 7 calendar days of purchase: right of withdrawal under the Brazilian Consumer Code (CDC, art. 49) — full refund, for any reason, no questions asked. This right cannot be waived and applies even if the account has used the full refund before.
• Within 14 calendar days counted from the last charge: on request, we refund that charge in full.
• Once per account: the full refund is granted a single time. Later requests from the same account do not generate a new full refund — cancelling remains available and stops future charges.
• Charges made up to August 14, 2026 keep the 30 calendar day window that applied when they were made.
• After that, the amount already paid is not returned — cancelling stops future charges. Cases outside these periods are reviewed individually.

• Clear privacy data: Open ZapVox → Settings → "Clear local privacy data" to remove diagnostic logs and contact name caches without affecting your settings.
• Clear all extension data: Go to chrome://extensions, click "Details" on ZapVox, then "Clear site data." This removes all cached transcriptions, settings, and BYOK keys.

This message comes from Chrome itself. It appears when the part of ZapVox running inside the WhatsApp Web tab tries to talk to the extension engine and finds nobody on the other end. Your account and plan have nothing to do with it.

Why it happens

• The extension received an automatic update (or was disabled) while the WhatsApp Web tab stayed open, so the tab is still tied to the previous version. This is the most common cause.
• The extension engine (service worker) stopped and did not start again.
• The tab was put to sleep by Chrome's Memory Saver or by a tab-suspender extension.
• Two copies of ZapVox are installed, or another WhatsApp extension is interfering.
• The installation is corrupted.

How to fix it (follow the order and test after each step):

1. Reload WhatsApp Web with Ctrl+Shift+R (on Mac, Cmd+Shift+R).
2. Make sure ZapVox is enabled: open chrome://extensions and check that the toggle on the ZapVox card is blue. If it is off, turn it on and reload WhatsApp Web. There is no need to update anything by hand: if you installed from the Chrome Web Store, updates arrive automatically.
3. Close and reopen Chrome (all windows) and open WhatsApp Web again. This completes any update that was left halfway.
4. Remove duplicate copies: if ZapVox shows up more than once in chrome://extensions, remove all of them and install a single copy from the official store.
5. Keep WhatsApp Web always active: in chrome://settings/performance, add web.whatsapp.com to "Always keep these sites active". If you use a tab-suspender extension, add WhatsApp Web to its exceptions.
6. Test without other WhatsApp extensions (CRMs, bulk senders, chat organizers). If it works, turn them back on one at a time to find the conflict.
7. Reinstall: remove ZapVox, close and reopen Chrome, and install it again from the Chrome Web Store. Then sign in to your account. Note: settings, schedules and reminders are stored only in the browser and are erased when you reinstall.

Still happening? Send [email protected] a screenshot of the ZapVox card in chrome://extensions (with the version and the "Errors" button, if any) and the first line of chrome://version.

To transcribe, ZapVox needs the same audio file that WhatsApp Web plays. When WhatsApp hasn't brought that file to your computer yet, there is nothing to transcribe — and WhatsApp itself shows it.

How to spot it: instead of ▶️ you see a download icon (down arrow), or no play button at all. If you press play and it doesn't play, that's it.

What to do, in this order:

• Wait a few seconds and click 🎙️ again — on a slow connection WhatsApp takes a while to fetch the audio.
• Old voice message? Scroll to it slowly and wait for the ▶️ to show; WhatsApp drops from memory the voice messages that are far up in the chat.
• Reload the WhatsApp Web page (F5).
• If the voice message doesn't play in WhatsApp (not even on the phone), WhatsApp no longer has the file — common with voice messages from days or weeks ago. Ask the person to send it again.

Once the ▶️ is back and it plays, ZapVox transcribes it normally.

This was fixed in version 3.10.91. If clicking a contact's name only marks the row and opens nothing, this is it.

Immediate workaround, no update needed:

1. Open the ZapVox panel (icon in the browser bar)
2. Go to Settings
3. Turn off "Highlighted ✍️ button in chat"
4. Reload WhatsApp Web (F5)

It works again right away. Then update to 3.10.91 or newer (the update arrives on its own from the store; closing and reopening Chrome completes it) and you can turn the highlighted button back on if you like.

What was happening: an internal protection that stops clicks on our own buttons from leaking into WhatsApp ended up, under certain conditions, applying to the whole page — so WhatsApp stopped receiving clicks. It only affected people with the highlighted button turned on, which is why it showed up on one machine and not another. It's fixed, with tests that reproduce exactly that condition.

Updated and still happening? Write to [email protected] and we'll look into it.

This is the first thing to test when ZapVox was working and stopped — especially if reloading doesn't help.

WhatsApp Web was not designed to host extensions. When two or more of them modify the same screen at once (bulk-send tools, WhatsApp CRMs, chat organisers, translators), they trip over each other: buttons disappear, audio fails to load, transcription never completes.

A one-minute test:

1. Open chrome://extensions
2. Disable every other extension that acts on WhatsApp Web (leave only ZapVox)
3. Reload WhatsApp Web (F5) and transcribe an audio message

Did it work? It was a conflict. Re-enable the others one at a time until you find the culprit — and tell us which one, so we can try to coexist with it.

Still failing with ZapVox alone? Then it's on us: send a console screenshot (F12 → Console) to [email protected] and we'll investigate.

• Refresh the page: Press Ctrl+R (or Cmd+R on Mac) on WhatsApp Web
• Check if ZapVox is enabled: Click the puzzle icon in Chrome toolbar and make sure ZapVox is active
• Close and reopen Chrome: close all windows, open Chrome again and then WhatsApp Web. There is no need to update the extension by hand: updates arrive automatically from the store

When you choose "Sign in with e-mail (code)", ZapVox immediately sends an e-mail with an 8-digit code, valid for 1 hour. It comes from [email protected] with the subject "Seu código de acesso ao ZapVox: 12345678" (the body is in Portuguese, English and Spanish). If it didn't show up, try this in order:

1. Wait 1 minute — some providers delay delivery.
2. Check Spam / Junk and, in Gmail, the Promotions and Updates tabs. Found it? Mark it as "Not spam" so the next ones land in your inbox.
3. Double-check the e-mail you typed — one wrong letter sends the code somewhere else.
4. In ZapVox, click "Send code" again (after 1 minute). The most recent code is the valid one.
5. Work e-mail? Some company servers block automated messages. Ask IT to allow [email protected] — or use a personal e-mail.
6. Immediate alternative: sign in with Google or Microsoft — no e-mail involved, 10 seconds.

Still nothing? Write to [email protected] with the e-mail you used and the time of the request — we check delivery on our side.

• "Network error": Check your internet connection (only needed for cloud/BYOK transcription)
• "Daily limit reached": You've used your plan's daily cloud operations or minutes of audio for today (limits reset at midnight, Brasília time). BYOK with your own key doesn't consume any ZapVox limit (usage draws on your key's quota with the provider)
• "Invalid API key" (BYOK): Check your API key in the "Transcription" section → "🔑 API" tab → "Set up keys →". Make sure it hasn't expired
• Audio too short/long: Very short clips (<1 second) or very long ones (>20 minutes) may fail. For long audio, try cloud transcription