How to convert whatsapp voice notes to mp3 — no upload
- Step 1Drop your Opus or WebM file — Export or save your WhatsApp voice note as .opus.
- Step 2Select MP3 output bitrate — Drop the file here.
- Step 3Download the MP3 — Download the MP3 — your private message was never uploaded.
Frequently asked questions
What is the Opus codec used for?+
Opus is a versatile open-source codec optimised for both speech and music at low-to-medium bitrates. It is used in Discord (voice channels), Telegram (voice messages), WhatsApp (voice notes), Zoom, and all major WebRTC implementations. It dramatically outperforms MP3 for voice at 32–48 kbps.
Where do Opus files come from that I might need to convert?+
Common sources: Discord voice message recordings (saved as .ogg Opus), Telegram voice notes, WebM audio files from Chromium-based browsers, WhatsApp voice notes on Android, and screen recordings with system audio captured via OBS using Opus encoding.
Will converting Opus to MP3 reduce voice quality?+
The Opus source is typically 32–64 kbps — already compressed. Converting to MP3 at 128 kbps or higher will sound near-identical to the Opus source, since both are well above intelligibility threshold for voice. Any quality loss comes from the decode-then-encode transcode, not from MP3's quality ceiling.
Privacy first
All audio processing runs locally in your browser using FFmpeg compiled to WebAssembly. No file is ever uploaded — only metadata counters are saved for signed-in dashboard stats.