P4Merge (https://www.perforce.com/products/helix-core-apps/merge-diff-tool-p4merge https://www.perforce.com/products/helix-core-apps/merge-diff...) is a similar

P4Merge (https://www.perforce.com/products/helix-core-apps/merge-diff-tool-p4merge https://www.perforce.com/products/helix-core-apps/merge-diff...) is a similarly powerful (and similarly ugly) tool for plain text diffs and three-way merges. It’s free, and though the 500 MB download includes Perforce, you can install P4Merge by itself. Unlike Beyond Compare, though, P4Merge cannot highlight syntax in the compared files.