ZapVox Help Center

Visit the Chrome Web Store and click "Add to Chrome." ZapVox also works on Microsoft Edge and other Chromium-based browsers. After installation, open WhatsApp Web and you'll see transcription buttons on audio messages.

Once installed, a small transcription button (🎙️) appears next to every audio message on WhatsApp Web. Sign in with your Google account first (login is required — you get a free 7-day trial, no credit card), then click the button and ZapVox converts the audio to text in a few seconds. Transcription runs in the cloud (Groq/OpenAI, or your own BYOK key) — the audio is processed and immediately discarded, never stored.

Yes, a Google login is required. It's free and takes 5 seconds: click "Sign in with Google" in the extension popup. When you log in for the first time, you automatically get a 7-day free trial with everything unlocked (cloud transcription, translation, summarization, sentiment) — no credit card needed.

ZapVox supports 99+ languages for transcription (auto-detected by Whisper in the cloud), including Portuguese, English, Spanish, French, German, Italian, Japanese, Chinese, Arabic, Hindi, and many more. The interface is available in English and Portuguese. Translation supports 30+ languages on the Trial and Pro plans.

Auto-transcription automatically transcribes new audio messages as they arrive — no clicking needed. You can enable it in Settings. It requires explicit consent and can be turned off at any time. Auto-transcription respects your daily limits and transcription method (Cloud or BYOK). Tip: there's an "Only new audios" toggle to save your daily quota so old audios aren't re-transcribed when you scroll.

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. Simultaneous use (two browsers or devices active at the same time on the same account) isn't allowed for now — this helps prevent fraud and account sharing.

Need more than one active browser at the same time (companies, teams)? Reach out at [email protected]: we have special/custom plans (e.g., an add-on per extra browser — terms on request).

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.

No. On-device Whisper was removed in v2.2.0 (April 2026) — it was heavy (~140-244MB download), slow on older PCs and noticeably less accurate than cloud Whisper. It was replaced by the BYOK + Cloud cascade. If you want free, unlimited transcription today, set up a free Groq key (BYOK) in about 30 seconds in the popup.

Cloud transcription sends your audio to a high-powered AI server for faster, more accurate results — especially for noisy audio, accents, or less common languages. Daily limits: Free 10 transcriptions/day and up to 15 min of audio/day; Trial 15 operations/day and up to 30 min of audio/day; Pro 150 operations/day per feature type and up to 150 min of audio/day (fair use). Limits reset at midnight, Brasília time. Audio is processed and immediately discarded; it is never stored on our servers.

BYOK lets you use your own Groq or OpenAI API keys for cloud transcription. This is available on any plan (including Free) and doesn't count toward daily limits. Your keys are encrypted with AES-GCM 256-bit and stored locally — they never reach our servers. You're responsible for any API costs from your provider.

Yes! On the Trial and Pro plans, you can translate transcriptions into 30+ languages with one click. The Free plan does not include translation (removed in v2.2.1). Just transcribe the audio, then click the 🌐 Translate button and choose the target language. You can also set up automatic translation in Settings → Post-transcription.

Yes. Pro users can generate concise summaries and extract key topics from any transcription. This is especially useful for long voice messages — get the key points in seconds instead of listening to minutes of audio.

Transcription quality depends on several factors:

• 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

Tip: For difficult audio, try switching provider (Cloud ↔ BYOK Groq/OpenAI) and transcribe the original without translating at the same time.

Yes! The Free plan is free forever — no credit card, no expiry. It includes 10 cloud transcriptions/day (up to 15 min of audio/day), plus unlimited transcription with your own API key (BYOK, Groq has a free tier). The Pro plan ($3.99/month) raises this to 150 cloud operations/day per feature and up to 150 min of audio/day (fair use), adds multi-language translation, summaries, and removes the watermark.

When you sign in with Google for the first time, you automatically get a 7-day free trial of Pro features — no credit card required. During the trial, you get up to 15 cloud operations per day and up to 30 min of audio/day, with access to all Pro features. After 7 days, your account reverts to the Free plan. No charges are made during the trial.

The Pro plan includes 150 cloud operations/day per feature type and up to 150 min of audio/day (fair use), multi-language translation, summaries, topic extraction, and removable watermark. Pricing:

• Monthly: $3.99/month
• Annual: $27.99/year (save 41%)
• Biennial: $47.99/2 years (save 50%)

Prices are in USD but automatically converted to your local currency at checkout (Adaptive Pricing by Stripe).

You can cancel anytime from the ZapVox extension popup (Settings → Manage Subscription) or through the Stripe billing portal. After cancellation, you keep Pro access until the end of your current billing period. No further charges will be made.

In compliance with Brazilian Consumer Code (CDC Art. 49), you can request a full refund within 7 calendar days of purchase, for any reason, no questions asked. This is a legal right for all online purchases under Brazilian law. After 7 days, no refunds are issued — but with the 7-day free trial + 7-day withdrawal period, you have up to 14 days to evaluate the service risk-free. To request a refund, email [email protected].

Payments are processed securely by Stripe. We accept major credit and debit cards (Visa, Mastercard, American Express, etc.). Prices are listed in USD but are automatically converted to your local currency at checkout. ZapVox never stores your card data — all payment information is handled directly by Stripe.

ZapVox is designed with privacy first. Transcription runs in the cloud: only the audio being transcribed is sent, and it is immediately discarded after processing. With BYOK, the audio goes straight from your browser to Groq/OpenAI, bypassing our servers entirely. We collect your email for account management and basic usage counters (how many transcriptions you ran, not their content). We do not collect browsing history, contacts, photos, messages, location, or any data outside of WhatsApp Web audio. See our full Privacy Policy.

No. Audio sent for cloud transcription is processed in real-time and immediately discarded. We never store, record, or retain any audio content. Transcription results are cached locally in your browser for up to 7 days (to avoid re-processing), but never on our servers.

Yes. Your API keys are encrypted with AES-GCM 256-bit encryption and protected by PBKDF2 with 600,000 iterations and a unique random salt per user. They are stored exclusively in your browser's local storage and never transmitted to our servers. When you use BYOK, your keys go directly from your browser to Groq/OpenAI.

Yes. ZapVox complies with Brazil's LGPD (Lei Geral de Proteção de Dados), the EU's GDPR, and California's CCPA. You have the right to access, correct, delete, and export your data at any time. To exercise your rights, email [email protected]. See our full Privacy Policy for details.

You have two options:

• 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.

To delete your account and server-side data entirely, email [email protected].

Try these steps:

• 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
• Reload the extension: Go to chrome://extensions, find ZapVox, and click the refresh icon
• Clear cache: Sometimes browser cache can cause issues — try clearing it or using an incognito window

If the issue persists, email us at [email protected] with your Chrome version and a screenshot.

There's no model to download — all transcription runs in the cloud (Groq/OpenAI). The first transcription may take a few extra seconds while the extension wakes up and authenticates your session. If it's consistently slow, check your internet connection or set up a free Groq key (BYOK) in the popup for faster results.

Common causes and fixes:

• "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 is always unlimited
• "Invalid API key" (BYOK): Verify your API key in Settings → BYOK. 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

ZapVox works on Google Chrome and Microsoft Edge (and other Chromium-based browsers like Brave and Vivaldi). It does not currently support Firefox or Safari, as these browsers use different extension APIs. We recommend Chrome or Edge for the best experience.

WhatsApp Web occasionally updates its interface, which can temporarily affect ZapVox. We monitor for these changes and release updates as quickly as possible. Make sure you have auto-updates enabled for extensions in Chrome. If the issue persists for more than 24 hours, please report it to [email protected].