Data Preparation Before Deduplication
Separate in-tool comparison rules from preprocessing
SheetCleaner supports case, edge-whitespace, symbol, tolerance, and regex comparison. Email, phone, date, and width conversion require helper columns before upload.
Key Highlights
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Featured Tutorials
Excel Email Deduplication: Case, Dots & Plus Aliases All Covered
Professional guide for marketing email list cleaning: handle case differences, Gmail dot rules, +alias tags. Supports complex scenarios like ZHANG.SAN@EXAMPLE.COM vs zhangsan@example.com, alice+ads@gmail.com vs alice@gmail.com.
Remove Duplicate Phone Numbers in Excel: 3 Methods
Remove duplicate phone numbers in Excel using a helper formula, Power Query, or SheetCleaner. Standardize country codes first, then keep the newest record.
CSV Batch Deduplication: Big Data & Cross-Platform
Learn how to batch process multiple CSV files and handle encoding, delimiters, leading zeros, and other common issues. Includes Python script examples for larger workflows.
Excel Large-File Deduplication Without Crashing: Performance Optimization & Crash Prevention Guide
Professional guide for Excel big data processing: 64-bit environment setup, CSV optimization, batch processing strategies. Reduce large-file freezing, memory pressure, and program crashes with SheetCleaner, Power Query, and Python scripts.
How to Review SheetCleaner Deduplication Results
Learn how to verify kept rows, removed rows, and the reduction summary before downloading your cleaned spreadsheet.
Research/Survey Data Batch Deduplication: Email/Organization/Time Window Composite Key Practice
Professional guide for academic research and survey data cleaning: handle duplicate responses, cross-batch merging, organization name standardization, time window deduplication. Support privacy compliance, retention rule configuration, audit tracking, suitable for academic research, market research, user feedback and other scenarios.