Why is this server-side?

Re-encoding to arbitrary bitrates efficiently requires ffmpeg, which is not available in the browser without shipping a very large WebAssembly build.

Do you keep my files?

No. Uploads are processed in-memory and deleted as soon as the result is returned.

Which bitrate should I pick?

128 kbps for voice, 192–256 kbps for music, 320 kbps only if you need the absolute highest MP3 quality.

Audio Compressor

Reduce audio file size by compressing to a lower bitrate.

Server-side tool: Your audio file will be uploaded to our server for compression. It is processed in memory and deleted immediately after — we do not store your files.

Drop an audio file here

or click to browse

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This tool uploads your file to our server for processing. The file is deleted immediately after conversion.