Hey Product Hunt 👋 I’m the maker behind SheetCleaner. I built it after repeatedly running into the same spreadsheet problems: customer lists collected from different channels, duplicate records spread across multiple files, inconsistent formats, and sensitive data that people understandably didn’t want to upload to another server. SheetCleaner is a browser-based Excel and CSV cleaning tool. Your spreadsheet contents stay on your device, while you remain in control of every matching and merge rule. With SheetCleaner, you can: • Import multiple Excel or CSV files and sheets • Deduplicate using one or multiple columns • Keep the newest, oldest, highest, or lowest-value record • Merge information from duplicate rows • Apply case, whitespace, symbol, numeric tolerance, and regex rules • Preview every deletion, update, and merge before exporting • Process up to 100,000 rows for free, with no signup required I deliberately chose explicit, rule-based matching instead of black-box AI guesses. For business data, knowing why two records were matched can be just as important as finding the match. I’d especially love your feedback on three things: 1. Which deduplication or merge rule would be most useful to you? 2. Is the local-processing and privacy message clear enough? 3. What kind of spreadsheet cleanup currently wastes the most time for you? Thanks for trying SheetCleaner. I’ll be here throughout the launch to answer questions and learn from your feedback.

SheetCleaner

Clean and deduplicate Excel files locally in your browser

Clean and deduplicate Excel files locally in your browser