Top 6 Code Comparison Tools Every Developer Should Know

WinMerge

WinMerge is a Windows file comparison and merge tool that highlights differences and allows one‑way or two‑way overwriting of file contents.

Diffuse

Diffuse runs quickly from the command line, supports syntax highlighting for languages such as C++, Python, Java, and XML, and offers both two‑way and three‑way visual comparisons. It can fetch source files directly from version‑control systems like CVS, Subversion, Git, and Mercurial.

Beyond Compare

Beyond Compare easily highlights byte‑level differences between source files, using colors and customizable comparison rules. It supports syntax highlighting and rule‑based viewing for text, source code, and HTML files.

Altova DiffDog

Altova DiffDog is a visual tool for comparing and merging files, directories, database schemas, and tables. It provides advanced XML diff and edit capabilities and lets users quickly synchronize directories and merge text or source code.

AptDiff

AptDiff is a file comparison tool that handles both text and binary files, supports Unicode and files larger than 4 GB, and offers keyboard shortcuts, synchronized horizontal and vertical scrolling, and HTML‑format comparison reports.

Code Compare

Code Compare is a Visual Studio‑integrated tool for comparing source code files. It supports languages such as C#, C++, CSS, HTML, Java, and JavaScript, and provides visual diff and merge capabilities within the IDE.

Source: https://blog.csdn.net/yueliang2100/article/details/82190257