Manuscript Analysis Free · in-browser · optional cloud history

Sentence Rhythm Report

Average sentence length, histogram, and flags for monotonous rhythm.

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Paste your text above, then click Analyze — or try Sample.

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About this tool

Monotonous sentence length puts readers to sleep. This sentence rhythm report calculates average words per sentence, maps a length histogram, and flags when consecutive sentences are too similar — helping you vary pace in action, dialogue, and introspection.

Why manuscript analysis matters for fiction

Rule-based analyzers catch patterns human eyes skim past—especially in AI drafts where filter words, adverbs, and passive voice cluster predictably. Use metrics to prioritize revision, not to flatten your voice. Run a chapter first, fix the worst offenders, then scan the full manuscript.

Editing guides · AI manuscript editing

How to use it

  1. Paste your prose sample or chapter.
  2. Click Analyze to compute sentence stats.
  3. Review the histogram for length distribution.
  4. Check the monotony percentage for similar pairs.
  5. Mix short punchy sentences with longer flowing ones.

Tips for fiction authors

  • Follow a long, complex sentence with a short one. The contrast creates emphasis and keeps readers engaged.
  • Action scenes work best with short, punchy sentences (5–10 words). Save longer sentences for introspective or descriptive passages.
  • Read your prose aloud. If you run out of breath, the sentence is too long. If the rhythm feels robotic, you need variety.
  • AI drafts often produce sentences of identical length. Break the pattern by splitting one long sentence or combining two short ones.

Common questions

What is a good average sentence length for fiction?

Commercial fiction often averages 12–18 words per sentence, but variety matters more than the average alone.

What does monotony percentage mean?

It measures how many adjacent sentence pairs have similar word counts. High monotony suggests repetitive rhythm.

Can I use this on AI-generated text?

Yes. AI drafts often produce uniform sentence lengths — this tool spots that pattern quickly.

Related guides

Why AI Writes Every Character Wanting the Same Thing How to Use AI to Diagnose and Fix Sentence-Level Monotony How to Use AI to Write a Character's Interior Monologue Style How to Control AI's Punctuation Habits to Match Your Authorial Voice