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Convert.mp3 · .wav · .m4a · .aac

Convert audio to Opus online

100% localFiles never leave your device — no upload, no account, no tracking.
About Audio to Opus

Convert audio into Opus, the modern codec that delivers excellent quality at very low bitrates — ideal for voice, podcasts, and chat. Drop in an MP3, WAV, M4A, AAC, OGG, or FLAC, pick a bitrate, and we encode locally with ffmpeg.wasm.

The conversion runs entirely in your browser. Your audio never leaves your device.

How it works
  1. 01

    Add an audio file

    Drop your audio file onto the page or pick it from your device.

  2. 02

    Set bitrate

    Choose a bitrate — Opus sounds great even at low rates.

  3. 03

    Convert

    Click Convert to encode Opus locally with ffmpeg.wasm.

  4. 04

    Download

    Save the Opus file.

Features
best-in-class codectiny filesgreat for voice
Frequently asked
How does the Audio to Opus converter work?
Convert audio into Opus, the modern codec that delivers excellent quality at very low bitrates — ideal for voice, podcasts, and chat. Drop in an MP3, WAV, M4A, AAC, OGG, or FLAC, pick a bitrate, and we encode locally with ffmpeg.wasm.
Are my files uploaded to a server?
No. Everything runs entirely in your browser using local JavaScript and WebAssembly. Your files never leave your device.
Does it cost anything or require an account?
No. The converter is free, needs no sign-up, and runs locally in your browser.
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