Online Tool Store
Paragraph Topic Sentence Highlighter
Paste a draft to highlight each paragraph's opening sentence and flag paragraphs that may be missing a clear topic sentence. Runs entirely in your browser.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Example
Paragraph Topic Sentence Highlighter
Sample: 3-paragraph essay excerpt
Example shown — replace it with your own draft.
Remote work has fundamentally changed how teams collaborate. Video calls replaced hallway conversations...
Asynchronous communication became the norm for many teams. Slack threads and shared docs...
Result
How it works
- Paste your draft, paragraph by paragraph.
- The first sentence of each paragraph is highlighted.
- See which paragraphs have a clear topic sentence.
The method
Each paragraph's opening sentence is extracted and checked for clarity, flagging paragraphs that may benefit from a stronger topic sentence.
FAQ
Why does the first sentence matter so much?
In most expository writing, the first sentence of a paragraph carries the main idea, giving readers (and skimmers) a quick sense of what the paragraph is about before they read further.
Does this work for narrative or creative writing?
This is built around expository and academic writing conventions, where topic sentences are expected — narrative writing often doesn't follow this structure intentionally.
What if a paragraph doesn't have a clear topic sentence?
It gets flagged as missing one, which is a cue to consider whether the paragraph needs a clearer opening statement of its main idea.
How we compare
| Feature | Online Tool Store | Manual read-through | Writing tutor feedback |
|---|---|---|---|
| No software install | Yes | Yes | N/A |
| Quick to start | Yes | Slow | Slow, needs a person |
| Free to use | Yes | Free | Often paid |
For a fast structural self-check before submitting a draft, this catches obvious gaps quickly.