Online MP3 Compressor

Reduce MP3 file sizes while keeping your music sounding great. Choose quality presets, target percentage, or exact file size.

What Can You Do With Our MP3 Compressor?

Our free online MP3 compressor reduces audio file sizes significantly while preserving sound quality — ideal for saving storage, faster uploads, and sharing via email or messaging apps.

  • Choose from 3 compression methods: target audio quality, target file size percentage, or exact file size in MB
  • Quality presets: High (256 kbps), Medium (128 kbps), or Low (64 kbps) for quick compression
  • Set a target percentage (e.g. 40%) to compress files to a specific fraction of their original size
  • Specify an exact target size in MB for precise control over output file size
  • Batch compress up to 10 MP3 files at once with detailed before/after size comparison

How It Works

1

Upload MP3s

Drag and drop or browse to select your MP3 files. Supports files up to 25 MB each.

2

Choose Settings

Pick a compression method: audio quality preset, target percentage, or exact MB size.

3

Download Results

Review the before/after file sizes, see your savings percentage, and download your compressed MP3s.

Up to 90% Smaller MP3s

Advanced bitrate optimization reduces MP3 file sizes dramatically while preserving audio clarity for most listeners.

3 Compression Methods

Choose target audio quality (High/Medium/Low), a percentage of the original size, or an exact target file size in MB.

Fast Processing

Most MP3 files compress in seconds. Our server-side processing handles the heavy lifting so your device stays responsive.

Preserves Audio Quality

Smart bitrate optimization keeps your audio sounding great. The compressor automatically keeps the original if compression doesn't help.

Secure & Private

Your audio files are processed securely and automatically deleted after compression. No data is stored or shared with third parties.

Works Everywhere

No software to install. Compress MP3 files from any device — desktop, tablet, or mobile — using just your web browser. Free, no signup required.