Did your computer fail to open a TOPOJSON file? We explain what they are used for and recommend software that we know can open or otherwise handle your .TOPOJSON files.

What is a TOPOJSON file?

A .TOPOJSON file is a TopoJSON format file. Through our analysis of TOPOJSON files, we know that one use of the format is TopoJSON format. We have not yet described in detail what these files contain and what they are used for, but our team is working tiredlessly through thousands of file formats. We'd love hearing from you if you have information about the format.

We have not yet verified any programs for Windows that work with this specific file format. If you know one, please use the 'Suggest a program' link below. Thanks!

Suggest another file format using extension TOPOJSON

While we know of one file format using the .TOPOJSON file extension, there may be more. It is widespread that different programs use files with the same file extension for very different types of data. Please let us know if you are aware of a different kind of .TOPOJSON file.