Folder Diff -
Compare Two Directories Online
Compare two folders instantly and find differences in files and subdirectories. Our free folder diff tool recursively scans directories to identify added, removed, and modified files with detailed metadata comparison.
100% private and secure - all folder comparison happens directly in your browser using the File System Access API. No uploads, no servers, no tracking.
Visual Directory Tree Comparison
See your entire folder structure with color-coded status indicators. Click any modified file to view a full line-by-line content diff.
File Status Types
Files and folders are categorized by their comparison status to help you quickly identify what changed.
Added Files
Files that exist only in the changed folder. These are new files that were added.
Removed Files
Files that exist only in the original folder. These files were deleted or moved.
Modified Files
Files that exist in both folders but have different size or content.
How to Compare Two Folders Online
Follow these steps to compare directories and find differences between your folder structures.
Select Original Folder
Drop or browse to select your first directory. Files are read locally in your browser.
Select Changed Folder
Drop or browse to select the second directory for comparison.
Review Tree View
See the full directory tree with color-coded added, removed, and modified files.
View File Diffs
Click any modified file to see a line-by-line content diff with split or unified view.
Why Use This Folder Compare Tool?
Compare entire directory structures with a visual tree view. See file changes, size differences, and view actual content diffs for text files.
Recursive Comparison
Scan entire directory trees including all subdirectories. Find differences at any depth with a clear hierarchical view.
Visual Tree View
See your folder structure with color-coded status indicators. Green for added, red for removed, yellow for modified files.
100% Private
Your files never leave your device. Uses browser's File System Access API for secure local comparison without any uploads.
Content Diff
Click any modified file to see line-by-line differences. Full text diff viewer with split and unified views.
Metadata Comparison
Compare file sizes and detect changes even before viewing content. See size changes displayed inline in the tree.
No Installation
Works directly in your browser - no software to install. Just drag and drop folders or click to browse.
Browser Compatibility
Works in all modern browsers. Chrome and Edge use the File System Access API for the fastest experience. Firefox and Safari use a fallback method that works but may be slightly slower for very large directories.
Fastest
Fastest
Supported
Supported
Start Comparing Folders Online - Free
Scroll up and select your folders. No sign-up, no downloads, no limits.
Folder diff · Compare directories · Folder comparison tool · Compare two folders · Directory diff online