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Excel & CSV Merge and Cleanup Workbench

Add CSV or XLSX
Files are read and transformed only in this browser. Nothing is uploaded or stored on a server.
Paste table
Paste a tab-separated table or CSV. Values remain text, including identifiers.

Output is a new data-only file. Formatting, formulas, charts, macros, images, and comments are not preserved or executed; formula-like CSV strings are exported safely.