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Audio Compressor Online

Reduce audio file size with adjustable MP3 compression. Upload your recording, select the desired quality and download your compressed audio.

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Upload Audio File

Choose an audio file or drag and drop it here.

Browser-supported audio • Maximum 20 MB • Up to 8 minutes

Choose Compression Level

Choose an audio file to begin.

Important: This tool compresses audio by converting it into lossy MP3 format. Some already-compressed files may become larger. Audio formats must be supported by your browser, and the MP3 encoder is loaded from a CDN. Your audio is processed locally in the browser rather than uploaded to the FileZentra server.

How to Compress Audio Online

Upload an audio file, select a compression preset or custom MP3 bitrate, and click Compress Audio. After processing, compare the original and converted file sizes, listen to the compressed audio, and download the MP3.

For speech recordings, lower bitrates can help reduce storage requirements. Music often benefits from higher bitrates. The actual reduction depends on the original encoding, duration and selected output settings.