Sentence Length Analyzer Analyze sentence length distribution for better rhythm and readability.

What Is Sentence Length Analyzer?

Examines each sentence word count with distribution analysis. Categories: short (1-10), medium (11-20), long (21-30), very long (30+). Calculates average, standard deviation (variety), min/max, and visual sentence map with flags. Target 15-20 words average, std dev above 4.

Why Use Sentence Length Analyzer?

• Visual sentence map reveals patterns
• Distribution of sentence types
• Variety score for rhythm assessment
• Flags sentences over 30 words
• Average compared to recommended ranges

Common Use Cases

Blog Writing

Varied lengths for engagement.

Editing

Find overly long sentences.

Speech Writing

Optimize delivery rhythm.

Academic

Break dense sentences.

Technical Guide

Split on terminal punctuation with lookbehind. Stats: mean, min/max, std dev. Distribution buckets. Sentence map: block chars proportional to word count, flags for very long and very short. Variety: >8 high, 4-8 moderate, <4 low.

Tips & Best Practices

• 1
  Aim for 15-20 words average
• 2
  Vary intentionally for rhythm
• 3
  Split sentences over 30 words
• 4
  Uniform bars = monotonous rhythm
• 5
  Mix short punchy with longer flowing

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Frequently Asked Questions

Q What is the ideal average sentence length?

Web: 15-20. Journalism: 14-18. Academic: 20-25.

Q What does the variety score mean?

Higher std dev = more variety = more engaging.

Q Should I split all long sentences?

Only if meaning is preserved.

Q How does the tool handle abbreviations?

May split on abbreviation periods. Minor issue.

Q What is the sentence map?

Each line = one sentence with proportional bar and flags.

About This Tool

Sentence Length Analyzer is a free online tool by FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration or installation required.