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mp3fy

Files never leave your device. Any size, any length.

OPUS to MP3.
No size, no length limits.

WhatsApp and Telegram voice notes are Opus; MP3 is shareable and editable anywhere.

OPUS to MP3, without limits

On your device

Opus audio files (Ogg) usually carry Opus audio and come from WhatsApp, Telegram, Discord, web recorders. WhatsApp and Telegram voice notes are Opus; MP3 is shareable and editable anywhere.

How it works

  • Drop the OPUS file on this page (or choose it). Folders and many files at once are fine.
  • The audio is decoded and encoded to MP3 right here in your browser — your file is never uploaded.
  • Live progress shows speed and time left; when it’s done, save the MP3 or download everything as a ZIP.

Frequently asked

Is my OPUS file uploaded?

No. OPUS files convert inside your browser; nothing leaves your device.

Is there a file size or duration limit?

No. mp3fy streams the file while converting, so a 20 GB recording or a 10‑hour lecture works the same as a short clip.

What bitrate should I pick?

192 kbps is the sweet spot for music and speech; 128 kbps for voice notes and podcasts; 320 kbps if you want the maximum. You can also keep stereo or down‑mix to mono.

Are my tags and cover art kept?

Yes — title, artist, album and embedded cover art are carried over into the MP3 when the source has them.

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