Trailing Spaces Are Silently Breaking Your VLOOKUPs

VLOOKUP, MATCH, and any filter using an exact-text comparison check whether two strings are character-for-character identical. 'Acme Corp' and 'Acme Corp ' (with a trailing space) are different strings as far as Excel is concerned, even though they render identically in a cell. The extra character is invisible unless you click into the cell and look carefully at the end of the text.

This shows up constantly in exported data: fixed-width database exports pad values with spaces, copy-pasting from a PDF or web page often drags in stray whitespace, and manual entry sometimes leaves a trailing space from an accidental keystroke.

RowMint's Clean Excel Data tool trims leading and trailing whitespace from every text cell, and also collapses any run of multiple internal spaces down to a single space — so 'Acme Corp' (three spaces) becomes 'Acme Corp' (one space), not just 'Acme Corp' with the outer edges cleaned.

That collapsing behavior is worth knowing before you run it: if you're relying on multiple internal spaces for visual alignment in a text cell (rare, but it happens), this will flatten that formatting. For the much more common case — accidental extra whitespace from copy-paste or exports — this is exactly the fix you want.

Before assuming a lookup formula is broken, try wrapping both sides of the comparison in TRIM() as a diagnostic — if the formula suddenly works, trailing or internal whitespace was the cause. Running Clean Excel Data on the source file fixes it at the data level instead of patching every formula.