

WinMerge is a good software to compare HTML documents and merge the differences between them. My favorite Software to Compare HTML Files: In some of these, you can save comparison report to an external HTML file. A few of these software provide filter option to narrow down comparison by eliminating differences you don’t want to see.

You can even customize various view preferences like show line number, ignore whitespaces, show differences only, etc. All of these provide synchronize scrolling feature to let you easily analyze the comparison. Most of these software highlight the conflicting lines along with exact differences. You can save the documents after making changes. These software also provide a merge feature to merge differences from one document to another and make them identical. So, you can open two versions of an HTML document and compare it with the original one. Many of these even let you compare three HTML files. You can compare two HTML documents and find out conflicts between them. Here is a list of best free software to compare HTML files for Windows.
