English pluralizer

Singular ↔ plural for English words, including the irregular ones — child/children, person/people, knife/knives.

Converted in this browser. Nothing is sent anywhere.

Rule table + irregular dictionary (person→people, analysis→analyses, knife→knives…), uncountables pass through, casing is preserved. English only; line-by-line. Heuristic — check a dictionary when it matters.

How to use

  1. Paste words, one per line.
  2. Choose the direction.
  3. Copy the result.

What it supports

Regular rules (y→ies, sibilants→es, f→ves) plus a table of ~160 irregulars and uncountables. Phrases pluralize their head word. Case is preserved. Up to 100,000 words of input; ambiguous rare forms fall back to the regular rule.

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