PrivaSheet

PrivaSheet is a privacy-first spreadsheet normalization tool for transforming Excel and CSV files into consistent, reusable formats.

Spreadsheet business data is processed entirely in your browser. Source files, cell values, transformed rows and generated workbooks are never uploaded to PrivaSheet servers.

You can create reusable output templates, define field types and matching rules, import multiple CSV, XLS or XLSX files with different source layouts, and map each source independently to the same target template.

PrivaSheet supports automatic and manual column mapping, required fields, default values, number and date formatting, validation, multi-file append workflows, file reordering, combined previews and optional sorting of the final normalized dataset.

Large spreadsheet workflows are processed locally using browser storage and background workers. The final XLSX or CSV file is generated directly in the browser and downloaded locally.

Templates and mapping rules can be reused for recurring workflows, making PrivaSheet useful for standardizing exports from different systems, customers, suppliers or business processes without sending spreadsheet contents to a third-party server.

PrivaSheet also includes import and export history, multiple languages, dark mode, account management, a permanent Free plan, and an optional Pro subscription for larger reusable workflows and advanced automation. Local imports and exports are unlimited by count on both plans.