m4atomp3

Convert a WhatsApp Voice Message (.opus) to MP3

Updated on 01/10/2026

WhatsApp saves voice messages in the Opus format (.opus extension, sometimes .ogg or .aac on iPhone). It is an excellent codec, but poorly recognized: Windows Media Player, most car stereos and many editing applications refuse to open it. As MP3, it plays everywhere and can be attached to an email or added to a file.

Step 1: export the voice note from WhatsApp

Step 2: convert to MP3

Open convert OPUS to MP3, drop the file (or every file from a conversation), and click Convert. The site also recognizes voice notes in .ogg and .aac.

💡 For voice, 128 kbps is more than enough: the file stays tiny and the quality is unchanged compared to the original.

Why not just rename it to .mp3?

Renaming the extension does not change the file's contents: a strict player will still refuse to open it, and VLC would have opened it anyway. The only reliable solution is a real re-encode, which is what this site does.

Keeping it as evidence (legal context)

If the voice note may serve as evidence, be sure to keep the original .opus file intact alongside the MP3 version: conversion alters the file and could be challenged. Note the date and the sender.

🎵 Ready to convert? Drop your files on the home page: free, no sign-up, and nothing is sent over the internet.

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