software:
BeyondCompare
vimdiff
vimdiff的使用方法
Visual Studio Code
VS Code: How to Compare Two Files (Find the Difference)
WinMerge
web service:
https://www.jstoolset.com/diff
優點: 免安裝
缺點: 無法在 file explorer 直接選兩個 file 進行 compare; 無法直接跳到下個 diff 的部分.

