SheetCleaner
Free Online Excel Duplicate Remover - Multi-Column & Cross-Sheet
Professional free online Excel duplicate remover with 9 smart strategies. Process 10M+ rows of data. Remove duplicates, merge customer lists, cross-sheet data cleaning - all processed locally in your browser for maximum security.
Supported file types: .xlsx / .xls / .csv, Max file size: 100 MB
Drag Excel file here, or click to select
Supports .xlsx, .xls, .csv formats, file size up to 100 MB
No file?Try with test data
Upload File
Drag and drop or click to select Excel file
Choose Rules
Select deduplication fields and retention strategy
Download Result
Preview results and download cleaned file
Why Choose SheetCleaner?
Professional, efficient, and secure Excel data processing tool that makes data cleaning simple
Online Tool, No Installation
Use directly in your browser, no software download required
Simple Operation, 3 Steps
Upload file → Select rules → Download results, simple and efficient
Complex Multi-column Deduplication
Support deduplication by multiple field combinations for complex business needs
Compatible with Major Spreadsheets
Supports Excel, WPS, Numbers and other software formats
Industry-Specific Optimization
Provides specialized templates for education, sales, e-commerce and more
Supports Million-Row Data
Advanced version supports large data file processing
Trusted by Users
Files Processed
Active Users
Success Rate
Avg Processing Time
Data Security & Privacy
Complete local processing, zero uploads, 100% protection for your data privacy and security
Local Browser Processing
All data processing happens locally in your browser, data never leaves your device, ensuring absolute privacy and security
No Network Transmission
File parsing and deduplication processing happen entirely locally, no uploads to any servers, eliminating data leak risks
Offline Available
Tool can be used offline after loading, process sensitive data with network disconnected, ensuring data stays in local environment
Instant Processing
Files are processed immediately after upload, no waiting required, data is cleared from memory instantly after processing, leaving no traces
Zero Server Dependency Security
Pure frontend architecture, no server storage, no data collection, fundamentally eliminating any possibility of data breaches
What Users Say
Real feedback from our satisfied users
"No more duplicate checking and complex formulas! Student registration processing efficiency increased by 10x."
Sarah Chen
High School Teacher
"Merging customer information from multiple channels has become so simple, saving tons of time."
Mike Johnson
Sales Manager
"The data cleaning function is very powerful and perfectly meets our business needs."
David Wang
Training Institute
Frequently Asked Questions
Answers to the most common questions to help you better use our service
Start Your Free Experience!
Upload your first Excel file and experience professional data cleaning service
Free to Use
Process files without registration
Safe & Secure
Data processed locally, never uploaded
Instant Processing
Complete data cleaning in 30 seconds