LOG1 File Type

- The quick facts

What are LOG1 files and how to open them

Are you having problems opening a LOG1 file or just wondering what they contain? We explain what these files are used for and show you software that we know can open or otherwise handle your files.

What is a LOG1 file?

Files that contain the .log1 file extension are usually log files that are created by the Windows registry. These files contain a log of changes that are made to the Windows registry. As changes are made to the registry, the .log1 files are updated to reflect those changes. The .log1 file is a part of a registry archive that contains other log files with similar extensions including .log, .log2 and .log3.

The .log1 file extension can also be used to make backup copies of software log files. A user can create the .log1 extension when they want to begin a fresh log file but do not want to delete the previous application log.

Files with the .log1 extension are commonly used for troubleshooting and software debugging purposes.

How to open LOG1 files

Important: Different programs may use files with the LOG1 file extension for different purposes, so unless you are sure which format your LOG1 file is, you may need to try a few different programs.

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!

Last updated: May 31, 2022

Suggest another file format using extension LOG1

While we know of one file format using the .LOG1 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 .LOG1 file.