AD2 file - How do I open a .ad2 file?
The table below provides useful information about the .ad2 file extension. It answers questions such as:
- What is the .ad2 file?
- What program do I need to open a .ad2 file?
- How can the .ad2 file be opened, edited or printed?
- How can I convert .ad2 files to another format?
Table of Contents
- ✅ ADPCM 2-bit Compressed Audio
- 🔄 .ad2 file converters
- 🚫 .ad2 file related errors
We hope you find this page helpful and a valuable resource!
1 extension(s) and 0 alias(es) found in database
✅ ADPCM 2-bit Compressed Audio

The AD2 file is an ADPCM 2-bit Compressed Audio. Adaptive Differential Pulse Code Modulation (ADPCM) is a digital compression technique used mainly for speech compression in telecommunications.
Other types of files may also use the .ad2 file extension.
🚫 The .ad2 file extension is often given incorrectly!
According to the searches on our site, these misspellings were the most common in the past year:
Is it possible that the filename extension is misspelled?
We found the following similar file extensions in our database:
🔴 Can't open a .ad2 file?
When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:
Windows cannot open this file:
example.ad2
To open this file, Windows needs to know what program you want to use to open it...
If you don't know how to set the .ad2 file association, check the FAQ.
🔴 Can I change the extension of files?
Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.
If you have helpful information about the .ad2 file extension, write to us!