Compress your file here

Or drop files here

Max. file size 50MB (want more?)

You're in good company:

Zamzar has converted over 510 million files since 2006

Why compress MP3 files?

MP3 is also known as MPEG Audio Layer-3 and in recent times has felt like the go to audio file format. It's certainly the most used and that's come as a result of more music being stored digitally. The MP3 file format was originally developed by the Moving Pictures Expert Group (MPEG) and its appeal is that it is around 10 times smaller than a WAV file but its quality sounds almost exactly the same. The reason for this is because whilst the MP3 file has been compressed, the type of compression used keeps the quality intact. As MP3 files are so widely used and stored it is perhaps unsurprising that they are often compressed further using tools like the Zamzar compression tool. Using the tool, the MP3 file is compressed to make it that much smaller whilst the sound quality remains intact.

Fast Downloads

We don't run any external ads, which means we focus solely on converting your files quickly and accurately.


All traffic to and from our servers is secured by transport-level security, using 128-bit SSL to encrypt the data sent between your systems and ours.

High Quality

Zamzar has been in existence now for over ten years, and so we’ve been able to improve and refine our file conversions to ensure they're of the highest standard.

Any Operating System

It doesn’t matter what operating system you’re running; as long as you have a web browser, Zamzar can convert your files.