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Find duplicate groups by name, size, name+size, or full content hash.
Find duplicate groups by name, size, name+size, or full content hash.
Workspace
Private · Browser-based · No account · No upload
Duplicate File Checker is a free online File Utilities tool on AllToolHub. Find duplicate groups by name, size, name+size, or full content hash.
It is designed for anyone packaging or inspecting files quickly. selected files are read in the browser within memory limits.
When you finish, download or copy the result and close the tab on shared computers. For multi-gigabyte archives, a desktop tool may still be more reliable.
Drop multiple files and choose compare mode (name, size, name+size, or content hash).
Run Find duplicates and review groups.
Content mode is more accurate but slower for large sets.
Yes. Duplicate File Checker on AllToolHub is free, requires no account, and is built to run in your browser without a paid plan or watermarks from us.
Processing is designed to happen locally in your browser whenever possible. selected files are read in the browser within memory limits. Standard web hosting may still log technical page requests, not your file contents.
After the first visit, the Progressive Web App cache can keep many pages available offline. Tool scripts must be cached first; heavy libraries load when you open the tool.
You get a consistent, fast UI, private local processing when possible, light/dark mode, and no mandatory sign-up - plus related File Utilities in one place.
Duplicate File Checker is built for anyone packaging or inspecting files quickly. Find duplicate groups by name, size, name+size, or full content hash.
Name+size is fast for obvious dups. Content (SHA-256) finds identical bytes even when names differ, but is slower on big files.
Find duplicate groups by name, size, name+size, or full content hash. It runs in your browser on AllToolHub with no account required.
Very large inputs may be limited by your device memory and browser. For huge files, try a desktop machine or split the work into smaller batches.