excel-formula-doctor

Paste a broken Excel or Google Sheets formula (VLOOKUP, INDEX/MATCH, SUMIF, XLOOKUP, array formulas) with its error - #N/A, #REF!, #VALUE!, #DIV/0!, wrong result - and get a diagnosis: why it breaks, the corrected robust rewrite (TRIM/CLEAN + exact match + IFERROR guard), and both locale variants (comma / semicolon separator). Deterministic rule engine, no cloud calls, your formula never leaves the job sandbox. Markdown report in seconds.