MP3 Compressor

Compress MP3 files in your browser. Upload audio, pick a smaller file size or bitrate, and download an MP3 that is easier to send, publish, preview, or deliver.

Drop audio to compress MP3 online

Choose MP3, WAV, M4A, AAC, OGG, FLAC, WebM, or Opus. The file is checked and compressed locally in your browser.

Local processing

Free to use

Common audio formats

Compression settings

Private browser compression

Target size128 kbps

Min 64 kbpsMax 320 kbps

Upload audio to estimate the available size range.

Output mode

Mono mixes left and right into one channel. Keep stereo for music unless the smallest file matters most.

Upload from the left panel to start compression.