SheetCleaner

What it does

SheetCleaner helps you merge, clean, and deduplicate Excel and CSV files without uploading sensitive data. Set explicit rules for multi-column matching, keep the latest or highest-value record, apply numeric tolerance or regex, preview every change, and export a clean file. It supports multiple files and sheets, runs entirely in your browser, and works without signup.

Merge files and remove duplicates with explicit retention, tolerance, regex, and aggregation rules. File contents stay in your browser.

SheetCleaner Sign in Get Started 100% local processing, nothing is uploaded Excel Deduplication Without Mistakes Upload Excel / CSV, remove duplicates by your rules: Keep latest records, use multiple columns, or apply numeric tolerance. Compare records with explicit rules for case, edge whitespace, symbols, numeric tolerance, or regex extraction, then choose how duplicates are retained or merged. Import multiple files and sheets at once, clean and dedupe across all of them. No need to upload sensitive data to third parties: ideal for customer lists, channel data, financial records, and HR scenarios. Registration and lead forms from multiple channels: lots of duplicates, messy fields,…from sheetcleaner.app

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