Check if this spreadsheet is safe to send
Paste a range or drop an .xlsx and get an instant risk scorecard — Send-ready, Needs review, or High risk, with the top reasons why. Six deterministic checks: broken references, visible errors, mixed text and numbers, duplicate lookup keys, formula outliers and missing copied formulas. Runs locally — no install, no sign-up.
Paste keeps cell values only. For the four formula-dependent checks — lookup index, duplicate keys, formula outliers and missing copied formulas — use the .xlsx tab, where all six checks run.
Drop an .xlsx here, or click to choose
Parsed right here in your browser — the file never leaves your device. Formulas included, so all six deterministic checks run.
What this checks for
All six deterministic checks SheetBrain runs inside Google Sheets — the last two need formulas, so they run on .xlsx upload. Still a quick preliminary screen on a static file, not the live-workbook audit or a clean bill of health.
Broken references
Cells showing #REF!, and VLOOKUP/HLOOKUP calls whose index points outside the range (a #REF! waiting to happen).
Visible formula errors
#N/A, #VALUE!, #DIV/0!, #NAME? and friends — errors already showing in the sheet.
Mixed text & numbers
Columns mixing numeric and text values — the silent footgun that makes SUMIFS, COUNTIFS and AVERAGEIFS return wrong totals.
Duplicate lookup keys
VLOOKUP/XLOOKUP keys with duplicates, where the lookup silently returns only the first match (.xlsx upload required).
Formula outliers
One cell in a copied-down column whose formula doesn’t match its neighbours — often a silent typo or a stray manual edit (.xlsx upload required).
Missing copied formulas
A gap where a row was hardcoded or a formula deleted inside an otherwise-consistent formula column (.xlsx upload required).
Want the full catalog and the live-workbook scan? Read the detector standard or docs.