How does the audio converter work?

It uses FFmpeg compiled to WebAssembly (WASM) and runs entirely in your browser. Your audio file is never uploaded to any server — conversion happens locally on your device.

Which audio formats are supported?

MP3, WAV, FLAC, AAC, OGG, and M4A. You can convert between any combination of these formats — for example WAV to MP3, FLAC to AAC, or OGG to M4A.

Why does it take a moment to start the first conversion?

The first conversion downloads the FFmpeg WASM core (~33 MB) from a CDN and caches it in your browser. Subsequent conversions on the same device start instantly.

Is there a file size limit?

There is no hard limit. The practical ceiling is your device's available RAM. Most modern browsers handle audio files up to several gigabytes without issue.

Does audio quality change during conversion?

Lossless formats (WAV, FLAC) converted to each other preserve full quality. Converting to a lossy format (MP3, AAC, OGG) involves some quality trade-off by design. Converting from MP3 to WAV does not restore lost data — it only changes the container.

Convert any audio format free — no signup, no watermark

Free audio format converter — all formats.

The simplest free audio format converter online. Supports MP3, WAV, FLAC, AAC, OGG, M4A — all processed locally via FFmpeg WASM.

FFmpeg loads once (~33 MB) then caches in your browser. First conversion may take 10–20 seconds to initialise; subsequent ones start instantly.

Convert Audio

1. Upload audio file

Drop files here

or click to browse

AUDIO/* · .MP3 · .WAV · .FLAC · .OGG · .AAC · .M4A · Max 50 MB

2. Choose output format

Files never uploaded

FFmpeg WASM — browser-native

No signup required