Tools
Free, no sign-up. Built on real parsing and a tested function guide — the same trust standard as our formula pages.
=FIX()Formula Fixer
Paste a broken formula. Deterministic checks catch smart quotes, unbalanced parentheses, missing exact-match arguments, and locale separators — with a corrected formula to copy.
=EXPLAIN()Formula Explainer
Inherited a mystery formula? Get a piece-by-piece breakdown: what each function does, which cells it touches, and what to watch out for.
=CHECKUP()Spreadsheet Health Check
Upload a workbook for an instant report: error cells, stale values, numbers stored as text, inconsistent formulas — then test formulas against your real data. The file never leaves your browser.
=CONVERT()Excel ↔ Sheets Converter
Moving between platforms? Get the equivalent formula — direct renames, structural rewrites, version warnings, and honest dead-ends instead of guesses.