Free Duplicate File Finder Online
Find duplicate files in your folders with our free online Duplicate File Finder. Upload multiple files and the tool identifies exact duplicates by comparing SHA-256 file hashes. See which files are identical, how much storage space is wasted, and easily identify files to remove. The tool uses the Web Crypto API for fast, accurate hashing entirely in your browser. Perfect for cleaning up downloads folders, organizing photo libraries, freeing disk space, and finding redundant files. No software installation needed, no sign-up required, and all files stay on your device.
How to Use Duplicate File Finder
Select Files
Drag and drop multiple files or click to browse. Select all files you want to check for duplicates.
Scan for Duplicates
The tool calculates SHA-256 hashes for each file and identifies exact matches.
Review Results
See duplicate groups with file names, sizes, and total wasted space.
Features
SHA-256 Hashing
Uses cryptographic hashing for 100% accurate duplicate detection — byte-level comparison.
Wasted Space Report
See exactly how much storage space is wasted by duplicate files.
Group View
Duplicates are grouped together so you can easily see which files are identical.
Browser-Based
All hashing and comparison happens locally. Your files are never uploaded anywhere.
Benefits of Using Duplicate File Finder
Completely Free
Use Duplicate File Finder without any cost, limits, or hidden fees. No premium plans needed.
No Installation
Works directly in your browser. No software downloads or plugins required.
100% Private
Your files and data are processed locally. Nothing is uploaded to external servers.
Works Everywhere
Compatible with Chrome, Firefox, Safari, Edge on desktop, tablet, and mobile.
No Sign-Up
Start using the tool immediately. No account creation or email verification.
Always Available
Access this tool 24/7 from anywhere in the world, on any device.
Frequently Asked Questions
Complete Your Audio & Video Workflow
These free tools work seamlessly with Duplicate File Finder to handle every step of your workflow.