Audio Compressor

Online UniConverter allows you to compress audio files online for free and without losing quality.

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1GB Maximum File Size

Unlimited Conversions/Compressions

High Speed Conversion

High Speed Compression

30 Concurrent Conversions

How to compress audio files?

1

Step 1: Add Audio Files

Add the audio files you want to compress from computer, device or network disk.

2

Step 2: Compress MP3/WAV/M4A File

Choose compress settings to reduce audio size and click Compress to run compressing process.

3

Step 3: Save Compressed Audio

Download the compressed audio files or save to Dropbox or Google Drive.

Compress MP3 | Compress WAV | Compress More...

Why choose Online UniConverter to compress audio?

Easy to Use, Convenient to Share

Online UniConverter (originally Media.io) can resize audio file online free within several clicks. It works on Windows, Mac, and Linux systems via a web browser. You can save the resized audios to Dropbox and share on Instagram, Facebook, YouTube and so on.

Any Input Resolutions & Formats

You can compress MP3, WAV and other audio files in any format, any resolution, 4K, 1080p, 720p, 480p, 360p, 240p, and other non-standard options. Video formats like MP4, MOV, AVI, MKV, WMV can be compressed online.

Smart Output Settings

Smart audio resizer to resize audio online free in one click, further customization like audio Bitrate, Output Size, and Format are also available to make.

No Watermark Added & No File Limits

Resize audio/video online without any watermark added. You can compress audio file one by one without quantity limits after sign up.

Privacy Security

A secure HTTPS (SSL) connection website, so you can securely upload your files. All your uploaded and compressed files will be automatically deleted from our servers in a few hours.

Fast Compression Speed

This robust song/sound/voice compressor is designed to quickly yet correctly reconstruct your file's original data. Your demand for efficiency is our pursuit!

FAQs about online audio compressor

  • 1. How do I reduce the size of an audio file?

    Audio file size is related to its format, encoder, sample rate, and bitrate. Generally speaking, changing the bitrate can make the audio file smaller, the higher the bitrate, the bigger your size is. Online UniConverter helps change audio bitrate from 320Kbps to 32Kbps with least quality loss.

  • Online UniConverter can work on phone. Just open the webpage from your mobile browser, and choose the audio files you need to compress by starting clicking on the Choose Files button. It's so easy and convenient.

  • With Online UniConverter, you can compress 2 audio files at a time. But you can free compress 10 times a day, and more premium services will be offered after a signup or purchase.
    Alternatively, you can consider choosing Wondershare UniConverter desktop version for efficiently batch audio compression.

  • Online UniConverter accepts audio files no more than 500MB for each. Based on a large amount of surveys, almost all audio files are satisfied with this.