Fix your Excel formula errors — free.
Upload a spreadsheet and we’ll find every formula that’s broken or throwing an error —
#REF!, #DIV/0!, #VALUE!, #NAME?, #SPILL! —
tell you in plain English what each one means and the likely cause, and flag the ones that still
calculate a wrong answer. Nothing is changed without showing you first.
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.”