Drop an audio file here, or click to select
Compress MP3, WAV, M4A, FLAC, OGG, Opus, and other browser-readable audio locally.
Choose the percentage of the original file size to keep, with 50% as the default. A 96 kbps MP3 can be compressed further to about 48 kbps. Open settings to choose the output format or set a bitrate manually.
Bitrate usually has the largest effect on output size. Converting stereo speech to mono can reduce size further, and lower sample rates can help with voice recordings that do not need full music bandwidth.
The size target is approximate. The tool uses a nearby supported bitrate and reports the actual result; container overhead and minimum codec bitrates can keep small files above the target.
This tool reduces file size by re-encoding the audio with a selected format, bitrate, sample rate, and channel count. It does not apply dynamic range compression to make loud and quiet passages more even.
Bitrate usually has the greatest effect. For speech, mono and a lower sample rate can reduce size further. Music normally benefits from stereo and a higher bitrate to preserve detail.
A source that already uses a low bitrate may grow when exported at a higher bitrate. Very short files also have container overhead, and converting from one compressed format to another cannot recover lost quality.
Related tools: Audio Converter · Audio Normalizer
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