Folder Compare
Compare Two Folders Online
Compare two folders online and see every difference across a project in seconds. Added, removed, and modified files shown in one merged tree, colour-coded by status. Click any modified file for a full line-by-line diff with character-level highlights and syntax colours.
Your files stay completely private - folders are read directly from your disk with your permission, compared in the browser, and forgotten when you close the tab. No uploads, no cloud service, no installation.
One Merged Tree, Colour-Coded
Both directories merged into a single tree. Green for added, red for removed, amber for modified. Click any modified file to open its full content diff in a side panel.
Three Kinds Of Differences
Identical files are hidden by default so the view stays focused on what changed.
Added Files
Files that appear only in the second folder - new files or files moved in from elsewhere.
Removed Files
Files that appear only in the original folder - deleted, moved out, or renamed.
Modified Files
Present in both but different. Click to open a full line-by-line diff in the side panel.
How To Compare Two Folders Online
Four steps. No installation, no uploads.
Pick The Original Folder
Click to pick or drag onto the left panel. Chrome/Edge open directly from disk; Firefox/Safari use drag-and-drop.
Pick The Changed Folder
Same process for the second folder. Both are scanned in the background.
Review The Merged Tree
Every file colour-coded by status. Collapse sub-folders or filter out unchanged files.
Open Modified Files
Click any text file for a full diff. Split or unified view with character-level highlights and syntax colours.
Why Use This Folder Compare Tool
Free, private, with full line-by-line diffs on every changed file in the tree.
Full Directory Trees
Recursively walks both folders and merges them into one view. Differences at any depth show in the same tree.
Merged Tree View
Added, removed, and modified files inline with size deltas and coloured status badges.
Private
Folders read from disk by the browser with your permission. Never uploaded anywhere.
Line-By-Line Diff
Click any modified text file for split/unified view with character-level highlights and syntax colours.
Size Comparison
Large binary differences show up immediately via size comparison, even without opening the file.
No Installation
Runs in any modern browser. Nothing to download or configure.
Browser Compatibility
Chrome, Edge, Brave, and Arc get direct folder access (fastest). Firefox and Safari use drag-and-drop (works reliably, slightly slower on large projects).
Fastest
Fastest
Supported
Supported
Frequently Asked Questions
How do I compare two folders online?
Pick or drag your first folder, then do the same for the second. Results show as a merged tree with files colour-coded: green for added, red for removed, amber for modified.
Can I compare directories as well as folders?
Yes - same thing. Both trees are walked, files lined up, and every difference shown in one merged view.
Does it work as a file compare tool too?
Yes. Drill into any modified text file for a full line-by-line diff right beside the tree.
Which browsers work?
All modern browsers. Chrome/Edge/Brave/Arc have direct folder access. Firefox/Safari use drag-and-drop.
Can it handle thousands of files?
Yes. Scanning runs in the background - start reviewing early results while the rest loads.
What file types get a content diff?
Any text file - source code, configs, Markdown, CSV, JSON, YAML, XML, logs. Binary files are compared by size and hash.
Does it detect renames?
Not yet. Renamed files show as one addition and one deletion. Rename detection is on the roadmap.
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