Focus Sentence Highlighter

Isolate one sentence at a time from a long passage, with its own word, character and reading-time figures, so you can edit sentence by sentence without losing the surrounding context.

What is Focus Sentence Highlighter?

Most editing problems are sentence-sized, but a long document makes them hard to see. The Focus Sentence Highlighter lifts one sentence out of the text at a time, shows it in a highlighted block with its own measurements, and keeps the whole passage below so you never lose the thread. It is a sentence highlighter for revision, not a grade: it reports length and reading time and leaves the rewriting to you.

The list is built with the same sentence tokenizer the counting tools use, which follows Unicode sentence boundaries. Each entry can be clicked, and Previous and Next step through the passage in order. The focused sentence appears with its word count, character count, the length of its longest word and an estimated reading time at two hundred and twenty words per minute. Those figures are the ones that make a weak sentence obvious: a sentence of forty-five words with three long words is not the same shape as one of twelve, and seeing the count makes the difference concrete.

The optional dimming switch fades every sentence except the current one. With it on, the passage reads like a set of highlights and the structure of the paragraph becomes visible — which sentences carry the argument, which ones repeat it, and where the rhythm is uniform. With it off, the full passage stays at normal weight and you can judge the flow around the sentence you are editing.

One long-standing caveat of the tokenizer applies and is stated rather than hidden: abbreviations followed by a period can be segmented as their own sentence, so a sentence beginning with a title is sometimes split in two. The same rule is documented on the Sentence Count Tool, exactly as it behaves here, because accurate reporting beats a quietly patched-up count.

The focused sentence can be copied in one click, which is the fastest way to move it into an editor, a comment on a colleague's draft, or a list of lines to rewrite. The tool deliberately does not offer editing inside the page: there is no rich text, no saved revision and no document model. It is a reading and diagnosis surface, and the copy button is the bridge to wherever you actually work.

Nothing is stored or sent. Pasting a client document, a manuscript or an exam answer carries no upload risk, because the segmentation and the counts happen in the page and are discarded when you close the tab.

The habit that makes the measurements pay off is to edit sentence by sentence after one full read. Read the passage at normal weight first, then work through the list with dimming on, copying each sentence out and rewriting it before moving on. Long sentences announce themselves, repeated openings become obvious when they appear one after another, and a sentence that has to be read twice usually has a figure that explains why. When the pass is finished, turn dimming off and read the paragraph again as a whole, because rhythm belongs to the sequence rather than to any single line.

How to use Focus Sentence Highlighter

1. Paste a paragraph or an entire passage into the box.
2. Read the focused sentence and its word, character and reading-time figures.
3. Use Previous and Next, or click any sentence in the list, to move through the passage.
4. Toggle dimming to see the paragraph's shape without the distraction of the surrounding lines.
5. Copy the sentence you want to rewrite and edit it in your own editor.

When to use Focus Sentence Highlighter vs related tools

Use it during a revision pass on a paragraph you already know is cluttered, or when a passage reads heavily but no single sentence looks wrong. The Sentence Count Tool gives the whole-document view of the same segmentation when you want to know how long sentences average out overall.

If the target is your own drafting pace rather than revision, the Writing Sprint Timer turns the same word counter into a clock for getting new sentences onto the page.

Privacy & Security

This tool runs entirely in your browser — no data ever leaves your device. There is no server round-trip, no upload, no logging, and no account required. Your input is processed locally using client-side JavaScript and is never stored, transmitted, or accessible to anyone else. When you close the tab, everything disappears.

Frequently asked questions about Focus Sentence Highlighter