About Compare Folders
Comparing two versions of a folder — a backup against the original, or two branches of a project — means answering three questions: which files are identical, which differ, and which exist on only one side.
This tool does that recursively and lets you drill into any differing file to see a line-by-line diff, then merge the two versions and save the result.
How to use it
- Choose the two folders to compare.
- Read the tree: every file is marked identical, differing, left-only or right-only. Filters let you hide identical files or exclude patterns like node_modules.
- Click a differing file to diff it line by line, take either side per change, and save the merged result.
Frequently asked questions
- How does it decide two files are identical?
- By content, not by timestamp or size alone — so a file that was touched but not changed is correctly reported as identical.
- Is this like WinMerge?
- It covers the same core workflow — recursive folder comparison, per-file diffing and merging — in a browser, with no installation.