Choose Files:


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

Compression Settings:

Output Files:

To compress all output files in a ZIP file, click "" 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 AAC files:

  1. Settings

    Set AAC audio quality first. AAC 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 AAC files to the "Choose Files" section. Each AAC file size can be up to 200 MB.

  3. Compress Files

    The batch compression automatically starts when 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 in a ZIP file, click "" 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. The output files will be automatically deleted on 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:

Advanced Audio Coding (AAC) is an audio coding standard for lossy digital audio compression. Designed to be the successor of the MP3 format, AAC generally achieves better sound quality than MP3 at the same bit rate. The AAC format allows developers more flexibility to design codecs than MP3 does, and corrects many of the design choices made in the original MPEG-1 audio specification. This increased flexibility often leads to more concurrent encoding strategies and, as a result, to more efficient compression.

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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