Narrative Consistency Checker

Check a multi-chapter story for contradictions in character and plot details

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Narrative consistency checker

Long fiction is where continuity errors hide: a character’s eyes turn from blue to brown between chapters, an age drifts, a sibling becomes a cousin. This tool splits your manuscript into chapters, scans each one for explicit statements about your characters, and flags where a later chapter contradicts an earlier one. It runs entirely in your browser, so even an unpublished manuscript stays private.

How it works

The checker first detects chapter boundaries from “Chapter N” headings or divider lines. Within each chapter it runs pattern matching to capture attribute statements — phrases such as “her eyes were green,” “he was thirty-two,” or “his wife” — and records the character name, the attribute, the value, and the chapter it appeared in. After scanning, it groups every statement by character and attribute. Wherever the same character and attribute hold two different values, it reports a contradiction with both values and both chapter numbers, so you can jump straight to the conflicting passages.

Tips and notes

  • Name characters consistently. The matcher keys on names, so “Beth” and “Elizabeth” are treated as two people unless you make them match.
  • It is a first pass. Explicit, restated facts are caught; implied or pronoun-only details are not. Always follow with a human read.
  • Mark your chapters. Clear “Chapter N” headings give the most useful, chapter-numbered output.
  • Private by design. Nothing leaves the browser, which matters for unpublished work.
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