#635 · Writing & Academic

Topic Sentence Finder

Rank the most likely topic sentence in every paragraph using position, repeated vocabulary, sentence scope, and transition cues. The finder explains why a candidate scored well and also shows the runner-up when available. It is designed for revision and outlining: the highest-scoring sentence may reveal the paragraph’s controlling idea, or show that the paragraph needs a clearer one.

Text Input

Paste or upload writing
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How to use this text tool

  1. Paste your draft or load a plain-text file.
  2. Choose a review mode if you want a stricter screening pass.
  3. Run the analysis or press Ctrl/Cmd + Enter.
  4. Review every finding in its original context.
  5. Copy the report or download the available TXT, CSV, or JSON file.

What this tool does

The output ranks candidate sentences for each paragraph and gives a transparent confidence estimate based on textual features.

Candidates gain weight for early position, vocabulary shared with other sentences, and moderate length; narrow examples and backward-looking transitions reduce the score.

A topic sentence may be implied, delayed, or split across two sentences. The ranking is evidence for review, not a definitive rhetorical classification.

Example

Input: Remote work changes how teams share informal knowledge. Employees no longer overhear quick explanations at a nearby desk. As a result, teams often document decisions more carefully. Clear written records can improve onboarding for new colleagues.

Expected check: The report identifies and organizes the relevant patterns in this sample, with sentence or component details that can be verified against the input.

Use cases

  • Revising essays and research proposals
  • Preparing feedback for writing instruction
  • Auditing reports before peer review
  • Organizing evidence and argument notes

Tips for better output

  • Analyze complete paragraphs when context matters.
  • Review flags instead of replacing text automatically.
  • Keep technical terms that are standard in your field.
  • Compare the report with your assignment or style guide.
  • Verify sources, claims, and inferred relationships manually.

Processing details

Processing occurs locally in the browser with deterministic JavaScript rules. Sentence boundaries, word forms, cue phrases, and labeled fields are analyzed without an external API.

Heuristics cannot fully interpret syntax, meaning, disciplinary conventions, or source credibility. Treat the report as a revision checklist, not a definitive evaluation.

Frequently asked questions

How accurate is the topic sentence finder?

It uses transparent rule-based text patterns, so it is useful for screening and revision but cannot replace contextual reading or full linguistic analysis.

Does this tool send my writing to a server?

No. The analysis runs in your browser, although files you later save or share are outside the tool’s control.

Can I use the result in an academic paper?

You can use the report to revise or organize your own work, but verify every classification and follow your institution’s authorship and citation rules.

Why might a sentence be classified incorrectly?

Abbreviations, unusual punctuation, discipline-specific terms, implied relationships, and syntactic ambiguity can all affect heuristic analysis.

What should I do after reviewing the report?

Return to the original passage, inspect each flagged item in context, and make only changes that improve accuracy, clarity, or argumentative structure.

Report fields

FieldMeaning
FindingsPatterns detected by the tool’s documented rules
ContextSentence or component used for manual verification
ExportStructured data for later review

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