Free Who or Whom Checker
'Who' is a subject pronoun (he/she/they). 'Whom' is an object pronoun (him/her/them). The checker scans your text, finds every 'who' or 'whom,' and flags cases where the grammar suggests the other form would be more correct.
How the Who or Whom Checker Works
The checker locates every 'who' and 'whom' in your text. For each, it examines surrounding prepositions ('to,' 'for,' 'with,' 'by,' 'from') and verb structure to determine whether the subject or object form is expected.
Rules & Best Practices
1After a preposition, use 'whom'
'To whom,' 'for whom,' 'with whom,' 'by whom,' 'from whom' — preposition + whom is always correct.
2If the answer is 'him/her/them,' use 'whom'
Test by mentally substituting he/she/they (subject) or him/her/them (object). 'Whom did you see?' → 'You saw him.' → 'whom' is correct.
3Formal writing demands the distinction
In academic, legal, or business writing, 'whom' is expected after prepositions. Casual writing often uses 'who' everywhere.
4When in doubt, recast the sentence
Many writers avoid the choice entirely by recasting: instead of 'to whom did you send it,' write 'who did you send it to.'
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