Free Sentence Counter — Count Sentences & Flag Long Ones

Long, tangled sentences bury your point — and you can’t fix what you can’t see. Paste any text to count sentences and words, get your average sentence length, and watch every sentence over your chosen limit light up in yellow so you can trim it. Perfect for essays, emails, and blog posts. Everything runs in your browser; nothing is uploaded.

How it works

• Step 1 — Paste any text: an essay, email, report, or article draft.
• Step 2 — Choose a writing-style preset (Academic, Standard, or Casual) or set your own long-sentence threshold with the slider. The splitter is smart about abbreviations like “Dr.”, “e.g.”, and “U.S.” so they don’t count as sentence breaks.
• Step 3 — Hit Count Sentences for six stats — sentence count, word count, average length, long-sentence count, longest, and shortest — plus your full text with every over-long sentence highlighted in yellow.

Everyday uses

• Students — catch run-on sentences in essays before your professor does.
• Bloggers — keep sentences short for skimmable, SEO-friendly articles.
• Job seekers — tighten cover letters and resumes to punchy, readable lines.
• Business writers — make emails and reports clear by splitting monsters over 20 words.
• Editors — spot sentence-length variety at a glance (all long = monotonous).

Frequently asked questions

What counts as a long sentence? It depends on your audience. The Standard preset flags anything over 20 words — a common journalism guideline. Academic writing tolerates more (15 can be too strict for papers), while casual writing can go to 30. Adjust the slider to your style.

Does it handle abbreviations correctly? Yes. Common abbreviations — Dr., Mr., e.g., i.e., etc., U.S., a.m./p.m. — are protected so their periods don’t split sentences.

Is my text private? Completely. The analysis runs in your browser’s JavaScript engine; your words never leave your browser and are never uploaded or stored.