What is an AVI file?
The .AVI extension stands for Audio Video Interleave File. It is a multimedia container format introduced by Microsoft in 1992 as part of its Video for Windows software. .AVI files store both audio and video data in a single file for synchronized playback. Most .AVI files use the Resource Interchange File Format (RIFF). However, because .AVI is a container, the actual video and audio data can be compressed using many different codecs, such as DivX, Xvid, or H.264. Additionally, some security camera systems, like Juan DVR/NVR, use the .AVI extension for proprietary video exports.
How to open AVI files?
Because an .AVI file can contain different codecs, compatibility can vary widely. You can play standard .AVI files using Windows Media Player. The most reliable desktop solution across operating systems is VLC media player, which includes built-in support for nearly all codecs found in .AVI containers. Advanced users can also inspect the internal file structure using command-line tools like FFmpeg (`ffprobe`).
Identify your AVI file
Because the .AVI extension has multiple possible codec configurations and uses (from standard web videos to raw DVR security footage), it can be difficult to know exactly what is inside. viewer.online/avi analyzes .AVI files to identify their exact format and creator software, shows which programs can open the file, and usually previews it.
File Conversion
If you need to share your video on modern platforms or play it directly in web browsers, you should convert it to a modern format like .MP4 or .WebM. You can safely convert your files using convert.guru.
Summary
viewer.online/avi directly opens and previews .AVI files in the browser, eliminating the need to install software or troubleshoot compatibility issues.