Are audio files uploaded to a server during conversion?

No. This converter uses FFmpeg.wasm — a WebAssembly port of FFmpeg that runs entirely in your browser. Your audio files are never uploaded to any server. All conversion happens locally on your device.

What audio formats can I convert between?

Supported formats include MP3, WAV, FLAC, AAC, OGG, OPUS, M4A, and AIFF. You can also extract audio tracks from video files in MP4, MKV, and MOV formats.

Why does the first conversion take longer?

The first conversion requires downloading the FFmpeg.wasm binary (approximately 30MB) from a CDN. This file is then cached by your browser, so subsequent conversions start immediately without any additional download.

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🎵 Audio Converter

Convert between audio formats and extract audio from video — entirely in your browser using FFmpeg.wasm.

⏳ Checking browser capabilities…

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Server Setup Required

One-time

FFmpeg.wasm requires Cross-Origin Isolation to access SharedArrayBuffer. Your web server must send these HTTP headers on all pages:

Cross-Origin-Opener-Policy: same-origin Cross-Origin-Embedder-Policy: require-corp

Local dev: npx serve -C . | Nginx: Add to server block | Apache: Add to .htaccess | Vercel/Netlify: Add to vercel.json or _headers file

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Drop audio or video files here

MP3WAV FLACAAC OGGOPUS M4AAIFF MP4MKV MOVAVI WebM

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Conversion Settings

Output Format

Bitrate

Sample Rate

Channels

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About FFmpeg.wasm

This converter uses FFmpeg.wasm — a WebAssembly port of the industry-standard FFmpeg library. All conversion happens entirely in your browser. No files are uploaded to any server. The FFmpeg WASM binary (~30MB) is downloaded once from a CDN and cached by your browser for subsequent conversions.

🔒 Files never leave your device

⚡ WebAssembly powered

🎬 Supports 300+ formats