Voice notes, kept private
WhatsApp audio to MP3
Turn WhatsApp voice messages into MP3 files that open on any computer, email client or upload form — without handing a private recording to someone else's server. The encoder runs inside this tab, on your own device.
Drop files here
OPUS, OGG, M4A, AMR, WAV or FLAC — up to 60 recordings per batch.
The moment a voice note leaves the chat, it stops working
Inside WhatsApp a voice message is effortless: tap and it plays. Save it out and it turns into a `.opus` file that Windows shrugs at, that Gmail attaches but nobody can open, and that insurance portals, HR systems and court e-filing forms reject on the extension alone. The audio is intact — it is the packaging that the rest of the world never learned to read.
The recordings people most need to convert are usually the ones they would least like to upload: a threatening message being reported, a doctor's instructions, a landlord dispute, a relative's last message. Sending those through an anonymous conversion site means trusting an unknown company with the audio, its retention policy, and whatever its ad partners run on the page.
Why nothing is uploaded here
There is no upload step because there is no server-side conversion. FFmpeg, compiled to WebAssembly, is fetched once as program code and then runs entirely in your browser: the file is read from disk into the tab's memory, decoded, re-encoded and written back out as a download. Nothing crosses the network, so there is nothing to leak, retain or subpoena.
If you need the words rather than the audio, the WhatsApp voice-to-text tool transcribes the same recording — also without sending it anywhere.
Step by step
1. Export the audio out of the chat
Long-press the voice message, tap Share, then Save to Files (iPhone) or Save to Drive/Downloads (Android). WhatsApp Web users can hover the message and use the download arrow.
2. Or grab it from the WhatsApp folder on Android
Open your file manager and go to Internal storage / Android / media / com.whatsapp / WhatsApp / Media / WhatsApp Voice Notes. Each chat has a dated folder full of .opus files.
3. Drop the files onto this page
Select a single note or a whole folder — 60 at a time. Nothing is uploaded; the files are read directly off your phone or laptop.
4. Pick MP3 and save
192 kbps keeps every word crisp; 96 kbps makes a tiny attachment for email. Save each file individually or download the whole batch as one ZIP.
Questions people ask
- Why does WhatsApp audio not play on my computer?
- WhatsApp records voice messages with the Opus codec inside an OGG container, because it squeezes a minute of speech into a few kilobytes over a mobile connection. Windows Media Player, QuickTime, most email clients and almost every upload form were never taught to read that container, so the file looks broken even though the audio is perfectly fine. Re-wrapping it as MP3 makes it universal.
- Does this work on an iPhone?
- Yes. Share the voice note to the Files app, then open this page in Safari or Chrome and tap the drop zone — the file picker reaches straight into Files and iCloud Drive. The conversion runs on the iPhone itself, so it also works with no signal.
- Is my recording uploaded anywhere?
- No. A WebAssembly build of FFmpeg is downloaded once as program code and then everything happens inside this browser tab. You can test it: once the page has loaded, switch on airplane mode and the conversion still completes. Nothing is stored, and closing the tab clears the memory it used.
- Can I convert an entire chat's worth of voice notes?
- Yes. Select every file in the WhatsApp Voice Notes folder and the queue works through them one by one with individual progress bars, then offers a single ZIP. There is no daily cap, because no server is doing the work and paying for it.
- I need this for a court or HR submission — what should I keep?
- Convert a copy and keep the original .opus untouched alongside it. Reviewers occasionally ask for the unmodified source, and an MP3 is by definition a re-encode. Also note the date folder the file came from; WhatsApp names files with a timestamp that helps establish when the message arrived.
- What about WhatsApp video or a voice call recording?
- Video files export as .mp4 and can be turned into audio with the MP4 to MP3 converter. Call recordings made by a third-party app are usually .m4a or .amr, and both are accepted by the drop zone above.