Audio Compressor

Compress audio files online and free without any quality loss.

Drop it like it's hot

Add your files by dropping them in this window

Drag & Drop or Hit to Add File

Online UniConverter (originally Media.io) is the best audio compressor online for free. It allows you to change the audio bitrate from 32Kbps to 320Kbps also convert the audio format to MP3, WAV, M4A, AAC, FLAC, M4B, OGG, and APE. The resized audio file can be downloaded directly or save to the Dropbox and sharing with friends.

Best Audio Compressor Without Losing Quality

Unlimited Audio Compressor on Your Desktop

Free Download for Desktop

Switch to Mac

Free Download for Desktop

Switch to Windows

0 second waiting for uploading and downloading.

1000+ video/audio formats supported for compression.

30X faster than any audio compressor.

Batch compress audio files without any quality loss.

Unlimited video downloading and converting to MP3.

How to Compress Audio Files Online With 3 Easy Steps?

Add audio file you want to compress from computer or network disk.

Choose audio quality and click COMPRESS.

Download audio file directly or save to Dropbox.

Why Choose Online UniConverter to Compress Audio Files?

Easy to Use, Convenient to Share

Online UniConverter (originally Media.io) can compress audio file size via a web browser on Windows, Mac, or Linux system, without any downloading and installing.
It enables you to save audio file to Dropbox and share it directly by Facebook, YouTube, or any other device.

Many Input Formats

You can compress audio file in any format including MP3, WAV, M4A, FLAC, etc.

Smart Output Settings

Smart audio compressor online to shrink audio file size with one click, further customization like video resolution, output size, and format are also available.

No Ads Added, No File Limits

Compress audio file without ads added, you can shrink audio file one by one without quantity limit after sign up.

Privacy security

Online UniConverter (originally Media.io) is a secure HTTPS (SSL) connection website, so you can securely upload your audio files.
All the uploaded and compressed audio files are automatically removed from our serves after a few hours.

Any Output Quality & Format

You can change the audio files quality with 32Kbps, 64Kbps, 128Kbps, 256Kbps, and 320Kbps. And convert the audio format to MP3, WAV, M4A, AAC, FLAC, M4B, OGG, APE as your needs.