Welcome to Wotsit.org

Welcome to Wotsit.org, the programmer's file and data format resource. This site contains information on hundreds of different file types, data types, hardware interface details and all sorts of other useful programming information; algorithms, source code, specifications, etc.

The search box (above right) is the simplest way to find information on a specific file type, all resources are also listed by category via the links on the left.


As you will have noticed Wotsit.org has undergone a long-overdue redesign. The new design should be quick to load and it should be easy to find what you're looking for.

The new version of the site is more efficient, and should be accessible on all modern browsers. Occasionally some users had problems with the file download protection on the previous site so this has been completely re-designed to eliminate problems.

Want to help?

If you have any information on file or data formats, protocols or hardware that would be useful to other programmers then please so that other programmers can make use of it. Suggestions for improving this site are also welcome.