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

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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

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Frequently Asked Questions

Is my audio uploaded to a server?

No. All audio conversion happens entirely in your browser. Your files are never sent to any server and remain completely private on your device.

Can I convert video to audio?

Yes. The converter supports video input formats including MP4, MKV, MOV, and more. You can extract audio from any of these files and convert to MP3, WAV, OGG, or FLAC.

What is the best format for music?

Use FLAC for lossless archival quality with no audio degradation. For general use and sharing, MP3 at 192kbps provides a good balance of file size and audio fidelity that is widely supported.

What is the difference between MP3 and AAC?

Both are lossy compressed formats. AAC (Advanced Audio Coding) is the successor to MP3 and generally provides better sound quality at the same bitrate. AAC is used by Apple devices and YouTube. MP3 is still more universally supported. For new projects, AAC at 192 kbps is a great choice.

Can I convert FLAC to MP3 without quality loss?

Converting FLAC (lossless) to MP3 (lossy) always involves some quality reduction because MP3 discards audio data. However, at 320 kbps, the difference is inaudible to most people. The reverse — converting MP3 back to FLAC — does not recover the lost quality.

Why does the converter take time to load the first time?

The first use downloads the FFmpeg.wasm binary (~30 MB) from a CDN. This happens once and is cached by your browser. After the first load, conversions start instantly without any additional download.