Free thesis statement checker
Paste a thesis statement to see whether it makes an arguable claim, is specific enough, fits the essay and signals the reasons you will develop. You get a score for each, notes on what to fix and frames to try.
What is a thesis statement checker?
What makes a strong thesis statement?
Weak and strong thesis examples
| Type | Example | Problem |
|---|---|---|
| Announces a topic | This essay is about school start times. | No claim |
| States a fact | Many high schools start before 8 a.m. | Nobody can disagree |
| Too broad | Schools should change to help students. | Cannot be proved in one essay |
| Strong | High schools should start at 8:30 a.m. because teenagers would get the sleep they need, miss fewer first-period classes and drive to school more alert. | Claim, specifics and reasons |
How the thesis checker works
- Paste your thesis. One or two sentences, up to 2,000 characters. Choose your grade level.
- Add the prompt. Optional. The tool checks whether your thesis shares key ideas with the question.
- Revise and check again. Fix the weakest criterion, then check the new version. Check again after you finish the draft.
What the thesis check covers
Arguable claim
Whether it takes a position instead of stating a fact, asking a question or announcing a topic.
Specificity
Flags vague words such as good, many and things, and suggests what to name instead.
Scope
Whether it is narrow enough to prove, and whether it matches your prompt.
Clarity and reasons
Length, one-sentence form, and whether it previews two or three reasons.
FAQ
What does the thesis checker look for?
Five things, each scored out of 4: arguable claim, specificity, scope, clarity and reasons. The total is out of 20.
Does it use AI?
No. It uses rules that check wording and structure in your browser, so the same thesis always gets the same result and your text is not sent anywhere.
Will it write my thesis for me?
No. It removes lead-ins such as “In this essay I will” and gives frames with brackets for you to fill in with your own position and reasons.
What kinds of essays does it work for?
Argumentative, persuasive, analytical, expository, compare-and-contrast and literary analysis essays, and research papers. Personal narratives usually do not need a formal thesis.
Can I paste my whole essay?
No. Paste only the thesis, up to 2,000 characters. To check a whole essay, use the essay checker.
Does the essay prompt matter?
Yes. A thesis can be strong in general and still miss the question. Add the prompt and the tool checks whether the key ideas match.
How accurate is it?
It is reliable for wording problems such as announcements, questions, vague words and missing reasons. It cannot tell whether your claim is true or original, so ask a teacher to review the idea.
I am a teacher. Can my students use it?
Yes. Students can use it without an account, and nothing is stored.