Tellsheet

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Tellsheet is an Excel add-in offering dozens of data cleaning and reshaping tools, with a permanent free tier and the full set for licensed users. Compatible with Windows, Mac, and web platforms, it processes all data locally on the user's machine. Its preview-before-apply workflow shows transformation results before changes are applied, and users can issue plain-English commands via a command bar or use point-and-click wizards, avoiding formulas or syntax. Key features include converting text-formatted dates, merging tables, unpivoting data, splitting names, standardizing values, reconciling lists, fuzzy matching, pattern-learning splits, barcode generation, JSON expansion, personal data redaction, and statistical functions like outlier detection. A history system logs every change, enabling step reversal with previews, even after saving. The AI command bar uses the user's API key, sending only commands while keeping cell data local. Pricing is one-time from $39, no subscription.