SheetCleaner
14 tutorials grouped around SheetCleaner, so readers can continue by topic.
Preview Excel Duplicates Before Removing: Real-Time Deduplication Preview Guide
See exactly which rows will be kept or removed before processing. SheetCleaner real-time preview feature lets you validate deduplication rules instantly with color-coded results.
Understanding Your Deduplication Results with Visual Analytics
Learn how to use SheetCleaner built-in charts to analyze your data cleaning results. Understand data composition with pie charts and identify which columns have the most duplicates using bar charts.
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.
E-commerce Sellers: Orders/Customer Data Deduplication & Cleansing Guide (SKU/Email/Phone)
Complete e-commerce data cleansing guide: prevent duplicate order imports, merge customer information, aggregate SKU variants. Support multi-channel order deduplication, customer CLV calculation, product inventory integration with both Power Query and SheetCleaner solutions.
Why Excel's Built-in "Remove Duplicates" Isn't Enough? (3 Better Solutions)
5 major limitations of Excel's built-in deduplication feature: no cross-sheet support, no retention rules, no fuzzy matching, no duplicate details, crashes on big data. Provides three more stable solutions: SheetCleaner, Power Query, and Excel 365 formulas.
Excel Cross-Sheet Deduplication Tutorial: Handle Duplicate Data Across Multiple Worksheets
Learn how to deduplicate across multiple worksheets, supporting multi-column combinations and smart strategies for large files.
Excel Deduplication with Keep Rules: Retain First/Latest Record Guide
Comprehensive guide to Excel deduplication retention rules: keep first, keep latest, keep max value, multi-tier rules. Provides SheetCleaner, Power Query, and Excel 365 formula implementations with complete examples and best practices.
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.
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.
How to Remove Duplicate Phone Numbers in Excel (with Country Codes & Format Standardization)
Essential skills for marketing/customer service list cleaning: standardize phone number formats, handle country codes, and keep the latest records. Supports standardization of various formats like +86 138-0000-1234, 13800001234, 086-13800001234.
Google Sheets Deduplication: Functions, Conditional Formatting & Online Tools Comparison (UNIQUE / SORTN / QUERY)
Complete online collaborative data deduplication guide: Google Sheets built-in functions UNIQUE, SORTN, QUERY comparison, conditional formatting to mark duplicates, cross-sheet merge deduplication solutions. Suitable for Google Forms surveys, shared sheets, online collaboration scenarios.
Merge Multiple Customer Lists and Remove Duplicates (Downloadable Template Included)
Professional guide for multi-channel customer list merging: unify field formats, intelligent deduplication, keep latest records. Suitable for form collection, offline events, social media promotion and other multi-source customer data integration with scoring and source tracking.
Excel Multi-Column Deduplication: Keep Unique Data by Combined Conditions
Learn how to use multi-column combinations as unique keys for deduplication, supporting keep-latest, keep-highest rules for customer, product, and order scenarios.
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.