Audio Compressor

This free audio compressor reduces the file size of MP3, WAV, M4A and other audio by re-encoding to MP3. Pick a bitrate, or switch to target-size mode and hit a specific size like 5 MB — the bitrate is worked out from the track length automatically. Downsample, mix down to mono for voice, and normalize loudness so quiet files come up to a consistent level. See the before-and-after sizes and preview the result. There is no size limit.