Scan every cell for #REF!, #N/A, #VALUE!, #DIV/0!, #NAME?, #NULL!, and #NUM! errors. Report with cell addresses. Free.
Free is enough for most one-off jobs. Pro raises the file and batch caps; Pro + Media unlocks GB-scale streaming and unlimited duration.
Larger files supported on Developer (5 GB CSV) and Enterprise (unlimited). All processing happens in your browser — files never reach a server.
Upload your XLSX file
Every cell is scanned for error values using SheetJS cell inspection
An error report lists each error type, cell address, and the formula that caused it
0 bytes uploaded. Error Locator runs entirely in your browser using SheetJS and ExcelJS. Your spreadsheets never leave your device.
#NULL!, #DIV/0!, #VALUE!, #REF!, #NAME?, #NUM!, #N/A, and #GETTING_DATA are all detected.
The error locator is diagnostic — it reports and flags errors. Some errors (like #REF! from deleted rows) can be resolved with the Formula-to-Value tool.
Paste an Excel formula and instantly see every nested function, argument, and logical step explained — by a deterministic parser, not an AI that can hallucinate. No sign-up, no upload, runs in your browser.
Open toolIdentify cells formatted as text that contain numeric or date values — a common source of Excel calculation errors. Free.
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