Sentence Extractor
Split a text into its sentences, one per line.
Longest Sentence Finder
Find the sentences that are costing you readers.
Quick Tool Overview
The Longest Sentence Finder ranks a text's sentences by length, marks the thresholds where comprehension measurably falls, and suggests where to split the worst — at the conjunctions and semicolons that usually mark two sentences pushed into one.
- What it does
- Finds the longest sentences and where to split them
- You give it
- An article, report or chapter
- You get back
- Ranked sentences with split points suggested
- Best for
- The fastest single improvement to readability
About the Longest Sentence Finder
Sentence length is the single biggest lever on readability. It is half of every major formula, and unlike vocabulary it can always be fixed — any long sentence can be split.
This ranks the sentences in a text by length and shows what each one is costing. A sentence over about thirty words is where comprehension starts to fall measurably; over forty and most readers lose the thread. The tool marks those thresholds, shows the readability grade the text would reach if the worst offenders were split, and suggests where to split them — at the conjunctions, semicolons and relative pronouns that usually mark the join between two sentences that were pushed into one.
Key features of the Longest Sentence Finder
Split points suggested
Conjunctions, semicolons and relative pronouns are marked, because that is where the join usually is.
Thresholds shown
Thirty words is where comprehension starts to fall and forty is where most readers lose the thread.
Projected grade
What the readability grade would become if the worst offenders were split.
Variation reported
Uniform sentence length reads as monotonous whatever the average, so the spread is shown too.
Correct sentence splitting
Abbreviations and decimals do not create false boundaries, so the lengths are real.
How to use the Longest Sentence Finder
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1
Paste your text
An article, a report or a chapter.
-
2
Read the ranked sentences
Longest first, with the length thresholds marked.
-
3
Look at the split points
Conjunctions and semicolons usually mark where two sentences were joined.
-
4
See what splitting would gain
The readability grade the text would reach if the worst were split.
Frequently asked questions
Comprehension starts to fall measurably above about thirty words and drops sharply above forty. Average sentence length matters more than any single one: fifteen to twenty words is the comfortable range for general writing.
No — uniform length reads as monotonous whatever the average. Good prose mixes short sentences with longer ones. It is the sustained run of long sentences that loses readers.
At a coordinating conjunction joining two independent clauses, at a semicolon, or before a relative pronoun starting a new idea. Those are the joins the tool marks, because that is where two sentences were pushed into one.
A lot. Sentence length carries roughly half the weight in Flesch-Kincaid, so cutting an average of twenty-five words down to eighteen drops the grade level by nearly three — more than any vocabulary change would achieve.
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