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ZapVox
WhatsApp Web audios → text in 99+ languages. 3 seconds
Stop pressing play on long WhatsApp voice messages. ZapVox transcribes every audio to text instantly, right inside WhatsApp Web. 99+ languages. Translate, summarize, sentiment analysis. AI cascade: Groq Whisper + Gemini + OpenAI. Fully encrypted - audio never leaves your machine in the clear. Manifest V3 + TypeScript. 10 free transcriptions/day, BYOK Groq unlimited, Pro $3.99/mo. Built solo over 2 years.
Hi Hunters! 👋
Two years ago I got tired of pressing play on yet another 4-minute WhatsApp voice message to extract one sentence. So I built ZapVox.
**What it does**
ZapVox sits next to every audio in WhatsApp Web with a 🎙️ button. Click it (or let it auto-transcribe) and you get the text in ~3 seconds. 99+ languages, fully encrypted, no audio ever leaves your machine in the clear.
**How it works**
- AI cascade: Groq Whisper Large v3 (primary) → Gemini 2.0 Flash → OpenAI (fallbacks)
- Local decryption: ZapVox decrypts encrypted blobs using HKDF-SHA256 + AES-256-CBC — same crypto WhatsApp uses internally
- Manifest V3 + TypeScript, Supabase Edge Functions
**Plans**
- Free: 10 transcriptions/day + BYOK Groq unlimited
- Trial: 7 days full, no card
- Pro: $3.99/mo (USD) or R$29.90/mo (BRL — auto-routed by IP)
Just got approved on the Chrome Web Store. Built solo over 2 years. Happy to answer technical or product questions — Diego 🇧🇷
The local-first encryption angle is genuinely cool, love that audio never leaves my machine unencrypted. One thing that would make it click for my workflow though is a keyboard shortcut inside WhatsApp Web so I can transcribe without clicking anything, maybe just highlight the audio and hit a hotkey. Would save a ton of time when I have a backlog of voice notes to get through.
honestly this looks super useful, the encryption angle is a nice touch. one thing though, can you add a way to set it to auto transcribe only when the voice note is over like 30 seconds, basically skip the short ones so it doesn't interrupt the flow for casual messages
Finally a solution to those endless voice notes. Tried it on a Spanish message and the summary was actually useful, not just a raw transcript.
About ZapVox on Product Hunt
“WhatsApp Web audios → text in 99+ languages. 3 seconds”
ZapVox was submitted on Product Hunt and earned 0 upvotes and 4 comments, placing #112 on the daily leaderboard. Stop pressing play on long WhatsApp voice messages. ZapVox transcribes every audio to text instantly, right inside WhatsApp Web. 99+ languages. Translate, summarize, sentiment analysis. AI cascade: Groq Whisper + Gemini + OpenAI. Fully encrypted - audio never leaves your machine in the clear. Manifest V3 + TypeScript. 10 free transcriptions/day, BYOK Groq unlimited, Pro $3.99/mo. Built solo over 2 years.
ZapVox was featured in Chrome Extensions (52.7k followers), Productivity (656.2k followers) and Artificial Intelligence (473.7k followers) on Product Hunt. Together, these topics include over 267.3k products, making this a competitive space to launch in.
Who hunted ZapVox?
ZapVox was hunted by Diegomaier Nunes Neri. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
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Diegomaier Nunes Neri