Do I Need to Learn the Command Line to Fix My Photo Dates?
The free tools are command line tools. Here is what that involves and what the alternative is.
exiftool is the standard answer and it is genuinely excellent, but it is a command line program with hundreds of options. Fixing Google Takeout dates with it means chaining several flags together correctly, and the syntax is unforgiving.
The bigger problem is that it does exactly what you type. There is no confirmation step and no undo. A command aimed at the wrong folder rewrites those files immediately.
Takeout JSON Metadata Fixer does the same job with a window, buttons and a preview of what will change. No terminal, no flags. Free for your first 500 photos, on Windows, Mac and Linux.