Fix your Excel formula errors — free.

What these errors mean

Excel shows an error token in a cell when a formula can’t return a valid answer. The most common ones:

• #REF! — the formula points at a cell, row, column, or sheet that was deleted or moved.
• #DIV/0! — it divides by zero, or by a cell that’s empty.
• #VALUE! — a value is the wrong type: text where a number is expected.
• #NAME? — an unrecognized name — a misspelled function or a named range that doesn’t exist.
• #SPILL! — a dynamic-array formula can’t expand because something is already in the cells it needs.
• #N/A — a lookup (VLOOKUP, XLOOKUP, MATCH) found no match.
• #NUM!, #NULL!, #CALC! — invalid numbers, non-intersecting ranges, or a calculation that can’t complete.

The silent-wrong ones

Not every bad formula shows an error token. Some calculate a number that’s simply wrong. We recompute each formula with an independent engine and flag any cell where the two disagree — those are the ones worth a closer look even though Excel shows no error.

How it works

The page runs the same functions your AI agent would call through our tools: it locates every formula, confirms each result across two independent engines, and explains what it found. It reads your file in memory and never stores it — this check changes nothing, it only tells you what’s wrong.

Want this inside your AI agent, on your own machine, with no upload at all? Install xlsx-for-ai and ask Claude or Cursor to “find the broken formulas in this workbook.”