AI introduction generator
Enter your topic or thesis and get a hook, background and clear thesis in seconds, or check the introduction you already wrote.
Your introduction will appear here.
What makes a good introduction paragraph
A strong introduction paragraph moves from general to specific: a hook, then background, then your thesis. It does a few things well and skips a few habits that weaken it.
Open with a real hook
Start with a question, a bold claim, a short scene or a fact your reader will not expect, not a flat announcement of your topic.
Give just enough background
Add only what the reader needs to follow your thesis. Save your evidence and examples for the body paragraphs.
Move from general to specific
Start broad, then narrow toward your argument, so the thesis feels like the point the paragraph was heading to all along.
End with a clear thesis
Your last sentence should be a claim a reader could repeat back to you, not a vague statement of intent.
Match your essay’s tone
An academic paper and a personal essay call for different openings. Keep the hook consistent with the rest of your writing.
Keep it proportionate
A short essay needs a short introduction, usually 3 to 7 sentences. Save the detail for the body paragraphs.
How to start an essay, step by step
Step 1
Settle your thesis first
Know what you are arguing before you write the opening line. A hook is easier to choose once you know where the paragraph is heading.
Step 2
Pick a hook that fits your topic
A question suits an open debate, a fact suits a topic with real numbers behind it, a short scene suits a narrative or reflective essay.
Step 3
Add the background your reader needs
One or two sentences that set up your thesis, without repeating what belongs in your body paragraphs.
Step 4
Write your thesis as the last sentence
State your main claim plainly. If you are previewing your main points too, keep that to one more sentence.
Step 5
Read it as your first reader would
Cut cliché openers, check the length fits your essay, and make sure nothing before the thesis argues your case for you.
Types of hook sentences, with an example
A hook sentence is the first line of your introduction paragraph. The style you choose should fit your topic and your essay’s tone.
Question
Why do some students thrive under a strict schedule while others fall behind the moment the structure disappears?
Bold claim
The five day school week is a relic of an economy that no longer exists.
Short scenario
A student stares at a blank submission box at 11:58pm, three minutes from a deadline she has known about for a month.
Surprising fact
Most teenagers check their phone dozens of times a day, and much of that happens in the hour before they try to sleep.
Quote
“You can’t pour from an empty cup,” a school counselor told her, though it took another year before she understood what that meant.
Introduction paragraph examples
Four essay introduction examples for common kinds of essays, each moving from a hook to background to a clear thesis.
Argumentative essay
Every morning, students at thousands of schools decide what to wear, and for many of them that choice carries real social weight. Debates over dress codes often focus on self expression, but they rarely address the pressure uniforms are designed to relieve: bullying over clothing, financial strain on families, and a classroom full of small distractions. Schools should require uniforms because doing so addresses all three at once.
Expository essay
A vaccine works by showing the immune system a safe preview of a germ, so the body can prepare its defenses before a real infection arrives. The process is simple in outline but precise in practice, and understanding it explains why some vaccines need boosters while others do not. This essay explains how vaccines train the immune system, from first exposure to lasting memory.
Compare and contrast essay
Online and in person classes ask something different of the students who take them. One offers the flexibility to study around a job or a family, the other offers the structure and community that keep many students on track. Though both formats can teach the same material, they suit different kinds of learners, and that difference matters more than which format a college happens to offer.
Research paper
Sleep quality shapes academic performance and mood among university students, yet many report chronic difficulties. Prior research has linked screen time before bed to poorer sleep, though the evidence relies mostly on self reported habits rather than the specific kind of screen activity involved. This study surveyed university students about their pre sleep smartphone habits and sleep quality to examine whether the type of activity, not just its duration, predicts how well they sleep.
Common introduction paragraph mistakes
A few habits weaken an introduction paragraph more than any single sentence can fix.
Starting with a cliché
“Since the dawn of time” and “Throughout history” tell the reader nothing about your actual topic. Open with something specific instead.
Defining the topic from a dictionary
“Webster’s dictionary defines success as…” is a well known opener for a reason: it rarely says anything interesting, and your reader already knows what the word means.
Announcing your intent
“In this essay, I will discuss…” tells the reader what is coming instead of just doing it. Write the sentence you were about to describe.
Burying the thesis
A thesis buried in the middle of the paragraph, or missing altogether, leaves the reader guessing what you are arguing. End with it instead.
Front loading the evidence
Save your strongest evidence and examples for the body paragraphs. An introduction previews the argument; it does not make it.
Frequently asked questions
What is an introduction paragraph?
It is the opening paragraph of your essay. A good introduction paragraph opens with a hook, gives the background your reader needs, and ends with a clear thesis, all without repeating what belongs in your body paragraphs.
Is this introduction generator free?
Yes. You can write or improve 20 introductions a day for free, with no signup. Another version and each rewrite count as one. If you need more, create a free Writing Studio account.
What should I paste in?
A topic or thesis is enough to start. Add your main points for an introduction that previews them, or paste your draft essay so the introduction fits what you actually wrote. You can also upload a PDF or Word file.
How do I start an essay if I do not have a hook yet?
Generate an introduction, then use Swap the hook to try three alternative opening sentences in different styles, and pick whichever fits your topic best.
What if I choose a fact or quote hook and have not given one?
The generator will not invent a statistic, a finding or a quotation. If your text does not supply one, it writes a bracketed placeholder, such as “[Add a statistic about...]”, so you can add a real one yourself.
How long should an introduction paragraph be?
Usually 5 to 7 sentences, or roughly a tenth of your essay. Short essays can open in 3 or 4 sentences, and long research papers may need more. Choose Short, Standard or Long in the options.
What is a roadmap sentence?
A sentence near the end of the introduction that briefly previews your main points. It is optional: turn it on if it helps your reader, or leave it off for a tighter paragraph.
How is a research paper introduction different?
Choose Research paper as the essay type and the structure changes to match: the topic and why it matters, what is already known, the gap in current knowledge, and the paper’s aim.
Can it improve an introduction I already wrote?
Yes. Open the Improve my introduction tab and paste your introduction, plus your essay or thesis if you have it. You get feedback on five things a good introduction does, then an improved version you can refine.
Does it work in other languages?
Yes. Choose the output language in the options: English, Spanish, French, German, Portuguese, Chinese, Japanese or Korean.
Can I use an AI generated introduction?
Check your instructor’s or school’s policy on AI tools first. Treat the result as a draft: read it against your essay and make it sound like you.