Is my audio uploaded?

No. All decoding and encoding happens locally in your browser — nothing is sent to a server.

Audio Converter

Convert audio between WAV, MP3, M4A, and Opus — right in your browser.

Drop audio files to convert

WAV, MP3, M4A (AAC), AAC, OGG, Opus, FLAC

Files stay on your device. Open DevTools' Network tab to verify.

Convert to

MP3/AAC/Opus and decoding compressed input use browser WebCodecs; available in modern browsers only.

01 — Overview

How it works

Convert audio files between WAV, MP3, M4A (AAC), and Opus locally in your browser. Decoding compressed formats and AAC/Opus output use the browser's built-in WebCodecs, so a modern browser is required. Your audio never leaves your device.

02 — Use cases

When to use it

01
Converting a WAV recording to MP3 for sharing
02
Turning M4A voice memos into MP3
03
Creating small Opus files for the web

03 — Examples

Real input, real output

recording.wav

ex 01

recording.mp3

Convert a WAV recording to MP3

voice.m4a

ex 02

voice.mp3

Convert an M4A voice memo to MP3

04 — FAQ

Frequently asked

Decoding MP3/AAC/Opus and encoding AAC/Opus use the browser's native WebCodecs API. WAV and MP3 encoding work everywhere; the rest need a recent Chrome, Edge, or Safari.