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Sentence & Paragraph Counter

無料の文・段落カウンタ。合計数、段落あたりの平均文数、最長段落、段落長ヒストグラムを表示。

使うべき場面

Use the sentence and paragraph counter for blog editing, content audit, web copy review, or any context where paragraph length affects readability. Essential for long-form writers checking pacing.

他の指標との比較

Single-purpose counter that complements the comprehensive stats already shown in the sidebar. Useful when paragraph structure (not just word count) is what you're auditing.

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仕組み

The counter tokenizes paragraphs (default: blocks separated by blank lines) and sentences within each paragraph.

Outputs total counts, average sentences per paragraph, longest paragraph (and its position), and a per-paragraph length histogram.

Toggle single-newline mode if your source treats each line break as a paragraph break.

よくある質問

Why isn't my paragraph count right?

By default, paragraphs are separated by blank lines (double newlines). Toggle single-newline mode if your text uses single line breaks for paragraphs.

What's a good paragraph length?

For web/blog reading, 3-5 sentences per paragraph. Academic and book prose often runs longer. Very long paragraphs scare web readers.

How does sentence detection work?

End punctuation (. ! ?) followed by whitespace and a capital letter. Abbreviations and decimals can confuse the detector.

実例

入力

A blog post with 8 paragraphs and 32 sentences.

出力

32 sentences across 8 paragraphs — avg 4.0 sentences / ¶. Longest ¶: 7 sentences.

Most blog posts read best at 3-5 sentences per paragraph. The longest paragraph (7 sentences) is a candidate for splitting.

よくある落とし穴

  • Paragraph detection depends on newline conventions — toggle single-newline mode if your source uses single line breaks.
  • Sentence detection breaks on abbreviations and code samples.
  • Very long paragraphs scare web readers — aim for 3-5 sentences per paragraph.
  • Headers and bullet items often count as single-sentence paragraphs.

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