MP3 Compressor
Compress MP3 files by reducing bitrate. Upload multiple files, pick a target bitrate, and download compressed audio.
Drag & drop your MP3 files here
Compress MP3 files by reducing bitrate. Upload one or more files, choose a target bitrate, and download the compressed versions.
Or click to browse
MP3, WAV, OGG, AAC, FLAC
How It Works
Upload MP3 files
Drop in the audio files you want to shrink.
Pick a target bitrate
Lower bitrate means smaller files; preview to check the quality holds up.
Download compressed audio
Export the smaller MP3s.
Frequently Asked Questions
128 kbps is transparent for most listeners and content; 96 kbps works for voice and podcasts; keep 192+ kbps for music where quality matters most.
Each lossy re-encode loses a little quality, so go directly from your best available source to the target bitrate rather than compressing in stages.
Smaller audio means faster page loads and smaller game bundles — often the difference between a WebGL game that loads in seconds versus one players abandon.
No. Spoken voice stays intelligible far lower than music does — 64–96 kbps is fine for dialogue and podcasts, while cymbals, dense mixes, and stereo width start audibly degrading below ~128 kbps. Compress music and voice to different targets rather than one blanket setting.
It's proportional to the bitrate drop: taking a 320 kbps file to 128 kbps cuts it by 60%. A quick check of your current bitrate (file size ÷ duration) tells you the headroom before you start.
MP3 data is already entropy-coded, so zip finds almost nothing to remove — typically 1–2%. Real savings come from re-encoding at a lower bitrate, which is what this tool does.