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.