Which input formats are supported?

Any format your browser can decode: MP3, WAV, OGG, FLAC, AAC/M4A, and WebM/Opus. Chrome and Edge cover the widest range. Safari natively handles MP3, WAV, AAC, FLAC, and newer OGG.

Which output formats are available?

WAV (PCM 16-bit) is always available and works on every device. OGG (Opus) is available on browsers that support the MediaRecorder API with OGG — Chrome, Firefox, and Edge. Safari currently does not support OGG output via MediaRecorder.

Why can't I convert to MP3?

MP3 encoding is not available natively in browsers. The Web Audio API can decode MP3 but cannot encode it. For MP3 output from a WAV file, use a desktop tool such as FFmpeg or Audacity after downloading the WAV.

Is my audio uploaded during conversion?

No. Conversion is performed entirely inside your browser. For WAV output, samples are written locally. For OGG output, the MediaRecorder API captures audio from an in-browser playback — nothing reaches a server.

What is the quality of the OGG output?

OGG output uses the Opus codec at the quality level your browser selects by default (typically 128 kbps). Opus at 128 kbps is transparent for most content. WAV output is lossless.

Why does the OGG conversion take longer than WAV?

WAV is encoded synchronously from raw samples. OGG conversion uses MediaRecorder, which plays the audio through an OfflineAudioContext in real time — it takes as long as the audio duration.

What sample rate does the WAV output use?

The WAV output uses the same sample rate as the decoded AudioBuffer, which matches the original file's sample rate (typically 44 100 Hz or 48 000 Hz).

Can I convert multiple files at once?

Currently one file at a time. Load a new file to convert another. The previous download link is replaced each time.

Audio Converter

Convert MP3, FLAC, M4A, OGG, and WebM to WAV or OGG — entirely in your browser, no server, no upload.

100% in your browser. Your file never leaves your device.

Audio file (MP3, WAV, OGG, FLAC, M4A, WebM)

Output format

WAV (universal) OGG/Opus (Chrome, Firefox, Edge)

Load an audio file to begin.

How to convert audio formats

Choose your source audio file. MP3, WAV, OGG, FLAC, M4A, and WebM are accepted.
Select the output format: WAV for lossless universal compatibility, or OGG for compressed Opus audio (Chrome/Firefox/Edge).
Click Convert and wait for the file to process.
Download the converted file using the button that appears.

Common use cases

MP3 to WAV: Convert a compressed MP3 to lossless WAV for further editing in a DAW.
FLAC to WAV: Repackage lossless audio into a format compatible with all media players.
M4A to OGG: Convert Apple AAC audio to open OGG format for use on Linux or in open-source software.
WebM to WAV: Extract audio from a browser recording (voice memo) as a standard WAV file.
WAV to OGG: Reduce the file size of a large WAV recording for web or mobile sharing.

Related tools: Audio Trimmer · Volume Normalizer · Audio Fade · Audio Merger

常见问题

Which input formats are supported?: Any format your browser can decode: MP3, WAV, OGG, FLAC, AAC/M4A, and WebM/Opus. Chrome and Edge cover the widest range. Safari natively handles MP3, WAV, AAC, FLAC, and newer OGG.
Which output formats are available?: WAV (PCM 16-bit) is always available and works on every device. OGG (Opus) is available on browsers that support the MediaRecorder API with OGG — Chrome, Firefox, and Edge. Safari currently does not support OGG output via MediaRecorder.
Why can't I convert to MP3?: MP3 encoding is not available natively in browsers. The Web Audio API can decode MP3 but cannot encode it. For MP3 output from a WAV file, use a desktop tool such as FFmpeg or Audacity after downloading the WAV.
Is my audio uploaded during conversion?: No. Conversion is performed entirely inside your browser. For WAV output, samples are written locally. For OGG output, the MediaRecorder API captures audio from an in-browser playback — nothing reaches a server.
What is the quality of the OGG output?: OGG output uses the Opus codec at the quality level your browser selects by default (typically 128 kbps). Opus at 128 kbps is transparent for most content. WAV output is lossless.
Why does the OGG conversion take longer than WAV?: WAV is encoded synchronously from raw samples. OGG conversion uses MediaRecorder, which plays the audio through an OfflineAudioContext in real time — it takes as long as the audio duration.
What sample rate does the WAV output use?: The WAV output uses the same sample rate as the decoded AudioBuffer, which matches the original file's sample rate (typically 44 100 Hz or 48 000 Hz).
Can I convert multiple files at once?: Currently one file at a time. Load a new file to convert another. The previous download link is replaced each time.

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