Manuscript Analysis Free · in-browser · optional cloud history

Readability Scores

Flesch reading ease, grade level, and avg words per sentence for your manuscript.

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

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About this tool

Readability scores help you match prose complexity to your audience — whether middle-grade adventure, commercial thriller, or literary fiction. This tool calculates Flesch reading ease, estimated U.S. grade level, and average sentence length from your pasted text.

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 a representative chapter or sample.
  2. Click Analyze to compute readability metrics.
  3. Review Flesch score and grade level.
  4. Read the audience guidance for your range.
  5. Compare chapters to keep tone consistent.

Tips for fiction authors

  • Most bestselling thrillers score Flesch 60–70. Literary fiction often sits at 40–55. Know your target before revising.
  • Dialogue naturally raises readability scores. If your score is too low, check whether your narration has unnecessarily complex sentences.
  • AI drafts often produce uniformly mid-range readability. Varying sentence complexity creates a more engaging reading experience.
  • Test your opening chapter and your climax separately — the climax should often read faster (higher Flesch score) to match the pacing.

Common questions

What is a good Flesch score for fiction?

50–70 is standard adult fiction. 70+ reads easier (YA or commercial). Below 50 is dense (literary or technical).

Do readability scores work for fiction?

They are approximations — dialogue and fragments affect scores. Use them to compare chapters, not as absolute quality measures.

Is my text uploaded for analysis?

No. All calculations run locally in your browser.

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