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Topic Sentence Checker

The topic sentence checker reviews paragraph openings for clear claims, thesis alignment, vague starts, and missing focus signals before you revise.

Check whether body paragraphs open with clear topic sentences that connect to the thesis or assignment focus. Use it as a planning or review aid, then choose a defined paid review when your prompt, rubric, formatting, or citations need deeper attention.

Free tool

Use the tool

Optional, but helps check whether each paragraph connects back to the main point.

Paste body paragraphs separated by blank lines.

This tool is for planning, editing, citation, and study support. Results stay in your browser unless you choose to email/save them or start an order.

Result

Review output

Paste paragraphs to check whether each body paragraph opens with a clear controlling idea.

Need a deeper paid review?

Get help with essay planning & review when you need the result cleaned up against your prompt, rubric, and citation style.

FAQ

Questions about this tool

What makes a topic sentence strong?

A strong topic sentence names the paragraph's controlling idea and connects that idea back to the paper's thesis or assignment focus.

Should every paragraph start with a topic sentence?

Most academic body paragraphs should open with a clear focus signal, though some introductions, conclusions, and transitions may work differently.

Can I paste just one paragraph?

Yes. For best results, include the thesis or assignment focus too so the checker can review alignment.

Can Academic Wizard review all topic sentences?

Yes. Essay Planning & Review and Academic Editing can check paragraph focus, transitions, and thesis alignment across a student-authored draft.

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