Is this audio converter free to use?

Yes, completely free. No account, no subscription, no hidden fees. Open the page and convert as many files as you need.

Is my audio uploaded to a server? Is it private?

No. All conversion happens entirely in your browser using ffmpeg.wasm. Your audio files never leave your device and are never sent to any server — fully private.

Which audio formats are supported for input and output?

The tool supports MP3, WAV, M4A, OGG, FLAC, and AAC for both input and output. You can convert any of these six formats to any other — for example M4A to MP3, WAV to FLAC, or OGG to AAC.

Will the audio quality be affected by conversion?

Converting to lossless formats (WAV, FLAC) preserves full quality. Converting between lossy formats (MP3, AAC, OGG, M4A) re-encodes audio and may introduce minimal quality loss — the tool uses FFmpeg's best default settings to minimize this. For archival purposes, convert to WAV or FLAC.

Does it work on mobile devices?

Yes. The tool works on modern mobile browsers (Chrome, Safari, Firefox on Android and iOS). Large files may take longer to process on lower-powered devices, but conversion runs fully in the browser with no upload needed.

🎵 Audio Converter — MP3, WAV, M4A, OGG, FLAC, AAC, Free & Private

Convert any audio file between MP3, WAV, M4A, OGG, FLAC, and AAC directly in your browser — completely free, no file upload required, and 100% private. This tool runs ffmpeg.wasm client-side, so your audio never leaves your device. Looking for a free CloudConvert alternative? Toolio’s version is completely free and needs no sign-up.

Choose an audio file

Convert to

Private by design. This tool runs entirely in your browser — nothing you enter is uploaded or stored, and it works offline.

About

This audio converter uses ffmpeg.wasm — a full port of the industry-standard FFmpeg library compiled to WebAssembly — to transcode audio entirely inside your browser. It supports the six most widely used audio formats: MP3 (universal compatibility), WAV (lossless PCM), M4A (Apple/AAC container), OGG (open Vorbis), FLAC (lossless compression), and AAC (high-quality lossy). Because all processing happens client-side, your audio files are never uploaded to any server, never stored, and never shared. The tool works fully offline once loaded, making it safe for sensitive recordings. Output quality is preserved at the best settings FFmpeg offers for each target format.

How to use

Click "Choose File" and select the audio file you want to convert (MP3, WAV, M4A, OGG, FLAC, or AAC).
Choose your desired output format from the dropdown — MP3, WAV, M4A, OGG, FLAC, or AAC.
Click "Convert" — ffmpeg.wasm processes your audio locally in the browser. No upload happens.
Once conversion is complete, click "Download" to save the converted audio file to your device.

FAQ

Is this audio converter free to use?: Yes, completely free. No account, no subscription, no hidden fees. Open the page and convert as many files as you need.
Is my audio uploaded to a server? Is it private?: No. All conversion happens entirely in your browser using ffmpeg.wasm. Your audio files never leave your device and are never sent to any server — fully private.
Which audio formats are supported for input and output?: The tool supports MP3, WAV, M4A, OGG, FLAC, and AAC for both input and output. You can convert any of these six formats to any other — for example M4A to MP3, WAV to FLAC, or OGG to AAC.
Will the audio quality be affected by conversion?: Converting to lossless formats (WAV, FLAC) preserves full quality. Converting between lossy formats (MP3, AAC, OGG, M4A) re-encodes audio and may introduce minimal quality loss — the tool uses FFmpeg's best default settings to minimize this. For archival purposes, convert to WAV or FLAC.
Does it work on mobile devices?: Yes. The tool works on modern mobile browsers (Chrome, Safari, Firefox on Android and iOS). Large files may take longer to process on lower-powered devices, but conversion runs fully in the browser with no upload needed.