What Is a PTT .opus File? Where WhatsApp Hides Voice Notes on Android, Why They Will Not Play, and How to Open or Convert Them to MP3

You plugged the phone into a computer, opened the WhatsApp media folders, and found a pile of files named like PTT-20261021-WA0007.opus. Or someone forwarded you a voice note and your email client, car or laptop shrugged at it. Searching for the file name gets you forum threads from 2019 that say to install a desktop program. This is the short, current explanation: what the name means, where the files are on Android, why so many things refuse to play them, and the simplest way to turn one into an MP3 on the phone itself.

Decoding the name: PTT-20261021-WA0007.opus

• PTT stands for push-to-talk. WhatsApp uses it as the prefix for voice notes recorded by holding the microphone button in a chat, as opposed to audio files that were attached from storage, which get an AUD- prefix instead.
• 20261021 is the recording date in year-month-day form: 21 October 2026. It is the date the note was recorded on the sender's phone, not the date you received it, which is why forwarded notes can carry old dates.
• WA0007 is a sequence number WhatsApp assigns to media on that day. It restarts and does not mean the seventh message in your chat.
• .opus is the audio format. Opus is an open codec designed for speech at low bitrates, which is exactly why WhatsApp uses it: voice notes stay tiny and still sound clear.

So a PTT .opus file is simply a WhatsApp voice note, with the date baked into the name. The name tells you nothing about who sent it; WhatsApp keeps that in its database, not in the file.

Where the files are on Android

On current versions of Android and WhatsApp, voice notes are stored under the app's media directory in internal storage. In a file manager such as Files by Google or Samsung My Files, browse to Internal storage, then Android/media/com.whatsapp/WhatsApp/Media/WhatsApp Voice Notes. Inside you will find folders named by year and week number, such as 202643, and the PTT files inside those.

On older installs, or phones upgraded from a WhatsApp version before the 2021 storage change, the folder may still be at the top level of internal storage under WhatsApp/Media/WhatsApp Voice Notes. If you cannot see the Android/media folder at all, your file manager is hiding it; Files by Google shows it after you enable the option to show hidden files, and connecting the phone to a computer over USB in file-transfer mode shows it directly.

You do not need to go digging for ordinary use. For a single voice note, long-pressing the message inside WhatsApp and using Share is faster and avoids the folder entirely. The folder matters when you want many notes at once, when you are moving a backup, or when you are trying to recover a note from a chat you already deleted.

Why a PTT .opus file will not play

Android itself can decode Opus, and most Android music players will open an .opus file if you point them at it. The refusals come from everywhere else: Windows Media Player and older versions of Windows without the codec, car stereos and USB players that only know MP3 and WAV, email previews, many web upload forms, and a lot of transcription tools. On a PC the usual advice is to install VLC, which does play them, but that does not help when the destination is a car or a form.

There is a second, sneakier reason. Some WhatsApp voice notes are not Opus at all. Depending on the phone that recorded them and the WhatsApp version, a PTT file may be AAC audio inside an .m4a or .aac container, with the same PTT naming. A player that tries to decode the file by its extension can fail on these even when it supports Opus. A converter that reads the actual contents rather than trusting the name handles both.

Three ways to open a PTT .opus file on Android

• Play it where it is. Tap the file in your file manager and choose a player that supports Opus, such as VLC for Android or most third-party music apps. This is enough if you only want to listen.
• Send it to a computer and use VLC. Fine for a one-off on a PC you control. Not fine for a car, a website or a colleague who will not install software to hear a voice note.
• Convert it to MP3 on the phone. The only option that makes the file play everywhere, and the one the rest of this post covers.

How to convert a PTT .opus file to MP3 on Android

Opus to MP3 Converter: Voice is a free Android app that converts .opus, .ogg, .m4a, .aac, .mp3 and .wav files, and more, to MP3 or WAV on the phone. The conversion runs locally: nothing is uploaded, there is no account or sign-up, and it works in airplane mode. It is free with a small ad banner, with no watermark and no file limit.

From inside WhatsApp, for one note:

• Long-press the voice message, tap the three-dot menu or the Share icon, and choose Share.
• Pick the converter in the Android share sheet. The note opens in the app ready to convert.
• Choose MP3 for playing and sending, or WAV if you plan to edit or transcribe the audio, and tap Convert.
• Tap Share next to the result to send the MP3 to Gmail, Drive, Files, Bluetooth or any app, or save it to your Downloads folder.

From the folder, for many notes at once:

• Open the converter and tap the button to pick audio files. The Android file picker opens.
• Navigate to Internal storage, Android, media, com.whatsapp, WhatsApp, Media, WhatsApp Voice Notes, then into the week folder you want.
• Select every PTT file you need. The app converts them one after another and lists each with its own Share button.
• Share or save them individually, or save them all to a folder and copy that folder to your computer over USB.

Converting does not touch the originals in the WhatsApp folder, so the voice notes still play in the chat afterwards.

MP3 or WAV for a voice note?

A WhatsApp voice note is recorded at a low bitrate, so MP3 at 128 kbps keeps all of the quality that was there; the file ends up a few times larger than the .opus but still small enough to email. WAV is uncompressed 16-bit audio, about ten times larger again, and the right choice only when the next step is an editor or a speech-to-text tool that prefers raw audio. If you are converting to keep a voice note as a record, converting to both is a reasonable habit: the MP3 to play, the WAV as the clean master.

Where it does not help

• A PTT file from a deleted chat only exists if the media folder still has it. If the note was deleted for everyone, or you cleared WhatsApp's storage, there is nothing to convert.
• A voice note that was never downloaded (the message still shows a download arrow in the chat) is not in the folder yet. Download it in WhatsApp first.
• Converting does not add who sent it or when you received it. If that matters, note it down or export the chat; our guide to what Export Chat means on Android covers getting the whole conversation with its media.
• If what you want is the words, not the audio, converting is a detour; Voice Note to Text transcribes voice notes on the phone instead.

For the related problem of a voice note that plays on the phone but not in the car or on a PC, see why WhatsApp voice notes will not play elsewhere and how to fix it.

The apps mentioned here are independent utilities built by the author. They are not affiliated with, endorsed by, or connected to WhatsApp LLC or Meta Platforms, Inc. WhatsApp is a registered trademark of Meta Platforms, Inc.