Choose Files:


Drop MP3 files here
(Up to 5 files, 200 MB each.)

Compression Settings:

Output Files:

To compress all output files into a ZIP file, click the "" icon on the right, then click "Add to ZIP". To download one single file, simply right-click on file link and click "Save link as...".

File Name Original Size Output Size Size Compressed Actions

How to compress MP3 files:

  1. Settings

    Set MP3 audio quality first. MP3 audio quality value can be 1 (lowest audio quality and highest compression) to 100 (best quality but least effective compression). You can also select "Change specific audio parameters" option to set audio bitrate and sample rate.

  2. Add Files

    Drag multiple MP3 files into the "Choose Files" section. Each MP3 file size can be up to 200 MB.

  3. Compress Files

    Batch compression will automatically start once the files are uploaded. Please be patient while files are uploading or compressing.

  4. Output Files

    The output files will be listed in the "Output Files" section. To compress all output files into a ZIP file, click the "" icon on the right, then click "Add to ZIP". You can right-click on file name and click "Save link as..." to save the file. Note that output files will be automatically deleted from our server in two hours, so please download them to your computer or save them to online storage services such as Google Drive or Dropbox as soon as possible.

About:

MP3 (formally MPEG-1 Audio Layer III or MPEG-2 Audio Layer III) is a coding format for digital audio. In the aspects of MP3 pertaining to audio compression—the aspect of the standard most apparent to end-users (and for which is it best known)—MP3 uses lossy data-compression to encode data using inexact approximations and the partial discarding of data. This allows a large reduction in file sizes when compared to uncompressed audio.

The exclusive "Overall Audio Quality" option on our website is inspired by the "JPEG Quality" option in image compression. It's more intuitive than setting audio parameters such as audio bitrate or sample rate.

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