Who Or Whom Checker

Detect whether to use “who” or “whom” with live color-coded grammar highlighting and instant pronoun fix suggestions.

Who / Whom Found

Correct Usage

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REAL-TIME GRAMMAR HIGHLIGHT:Green = Correct • Red = Correction Needed

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The He / Him Rule Mnemonic

whoSubject Pronoun (= He / She / They)

If you can replace the word with he, she, or they, use who (e.g., Who called? → He called).

whomObject Pronoun (= Him / Her / Them)

If you can replace the word with him, her, or them (ends with 'm'), use whom (e.g., To whom? → To him).

The Two Rules of Who vs. Whom

Mastering subjective and objective relative pronouns is straightforward when you look at the grammatical role:

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Frequently Asked Questions

What is the rule for choosing between "who" and "whom"?

"Who" is a subjective pronoun used as the subject of a sentence or clause (the person doing the action, matching "he", "she", or "they"). "Whom" is an objective pronoun used as the direct object, indirect object, or object of a preposition (the person receiving the action, matching "him", "her", or "them").

What is the "he/him" substitution trick?

If you can answer or replace the pronoun with "he", "she", or "they", use "who" (e.g. "Who wrote this? He did."). If you can answer or replace it with "him", "her", or "them", use "whom" (e.g. "Whom should we invite? Invite him."). Notice the mnemonic: "who" ends like "he", and "whom" ends in "m" like "him".

Why does "to whom" always take "whom"?

Words like "to", "for", "with", "from", "about", and "by" are prepositions. Prepositions always govern objective pronouns, making constructions like "to whom", "with whom", and "for whom" grammatically mandatory in standard formal English.

Is "whom" still used in modern English?

While informal conversational English frequently substitutes "who" for "whom", academic writing, legal publications, professional journalism, and formal exams (SAT, GRE, IELTS) strictly enforce proper who vs whom distinctions.

Is my text safe and private?

Yes. All grammatical parsing runs 100% locally on your device within the browser. Nothing is ever sent to or stored on our servers.