Essay structure checker
Checks how an essay is built rather than how it reads: paragraph lengths, whether paragraphs are linked to each other, whether sources are cited, and how much hedging and filler is carrying the word count.
Runs entirely in your browser — nothing is uploaded, and there is no account or limit.
Last reviewed 11 August 2026 · The HumanFlow team
Paste an essay to see how it is built: paragraphing, signposting, citations and padding.
These are structural checks, run in your browser. They can see how your essay is built — they cannot see whether the argument works, whether the evidence supports it, or whether you have answered the question. No tool can, and any that claims to predict a grade is selling you something.
For the other half of a self-check: reading level, sentence rhythm and AI-typical wording.
What structure checks are actually good for
Most writing tools look at the sentence. Word counters count, readability formulas measure sentence and word length, grammar checkers work line by line. All of that is useful, and none of it can see the shape of an argument — which is the thing that most often goes wrong in a first draft and the thing a reader notices first.
The checks here work at the level above the sentence, where problems are usually structural and usually fixable in one edit:
Paragraphs that hold two ideas
The most common structural fault, and the easiest to fix. A paragraph running past about 200 words has generally absorbed a second point. Find the sentence where the subject changes and break there — you will often find the second half needed a topic sentence it never had.
Paragraphs that do not connect
Readers infer the shape of an argument from the joins between paragraphs. If no paragraph opens with a word positioning it against the last one — however, by contrast, as a result, for example — the piece reads as a list of observations that happen to share a topic. The fix is rarely more writing; it is usually one word at the start of a paragraph.
Filler carrying the word count
Very, really, arguably, it is important to note that, plays a vital role in. Above roughly one per hundred words these stop being style and start being padding. They are also, not coincidentally, heavily represented in machine-drafted text — which is why cutting them tends to improve a draft and reduce how machine-typical it reads at the same time.
What it cannot see
Worth stating plainly, because “essay checker” is a phrase several tools use to imply more than they deliver. Nothing here knows whether you answered the question you were set. Nothing here knows whether your evidence supports your claim, whether your sources are any good, or whether your conclusion follows from your argument. A well-structured essay that is wrong will pass every check on this page.
Structure is a floor, not a ceiling. It is worth checking because structural faults are common, mechanical and quick to repair — not because fixing them makes an essay good.
If you are checking your work because you are worried about being wrongly accused of using AI, the most useful thing you can do is not a tool at all: keep your draft history. It is the one piece of evidence a detection score cannot argue with.
Common questions
- Will this tell me what grade my essay will get?
- No, and be careful with anything that says it will. Grades depend on whether you answered the question, whether your argument holds, and whether your evidence supports it — none of which is visible in the surface features any tool can measure. What this checks is construction: paragraphing, whether paragraphs connect to each other, whether sources appear, and how much of your word count is padding.
- How long should a paragraph be in an essay?
- There is no rule, but roughly 80–200 words covers most academic body paragraphs. The useful signal is not length itself — it is whether a paragraph holds one idea. A 250-word paragraph usually contains two, and the join is normally the sentence where the subject changes. A 25-word body paragraph is usually a point that was raised and then abandoned.
- Does this check plagiarism?
- No. Plagiarism checking requires comparing your text against a database of sources, which means uploading it somewhere. Everything here runs in your browser and nothing is sent anywhere, so a plagiarism check is not something this tool could do even in principle.
- Does this detect AI writing?
- No — it looks at structure, not statistical patterns. If you want an AI-detection read, our detector returns a score with the signals behind it, and the AI word finder highlights the specific vocabulary that makes writing read as machine-generated. Neither can prove authorship, and we do not claim they can.
- What counts as a citation here?
- In-text citations in the two most common forms: parenthetical author-date, like (Smith, 2023) or (Smith et al., 2023), and numeric markers like [12]. It will not see footnote citations, endnotes, or a bibliography that is not referenced in the body — so a zero here means "none of those two patterns found", not "no sources used".
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