Check · Fix · Format · Translate · Learn spreadsheet formulas.Independent tools at CellLingo.online

Small utilities, clear intent

Spreadsheet Converters

Quick browser-based helpers for the formatting and reference differences that often break formula handoffs.

Convert formula argument separators without touching quoted text.

Convert between dates and Excel 1900/1904 serial values.

Convert AA ↔ 27 and other spreadsheet columns.

Convert direct cell coordinates between reference styles.