Synopsis Generator
A free AI synopsis generator writes a polished synopsis for your book, screenplay, or story. Paste your plot details and get an agent-ready synopsis that captures your story's arc and stakes.
What Is a Synopsis Generator?
A synopsis generator is an AI-powered tool that transforms your story details into a structured, professional synopsis. Whether you are querying literary agents, submitting to publishers, pitching a film, or preparing a back-cover blurb, a synopsis generator saves hours of difficult writing work by organizing your plot into a clear, compelling narrative summary.
A synopsis is distinct from a blurb and from a query letter. A synopsis is a complete plot summary — beginning, middle, and ending — written in prose for agents and editors who need to evaluate your full story before offering representation. A blurb is the short marketing description on the back cover, designed to hook readers without spoiling the ending. A query letter is the business communication you send to an agent, which includes a brief pitch paragraph. This tool generates all three formats depending on which type you select. For dedicated query letter help, see the AI Business Plan Generator for pitch documents, and our free blurb generator for back-cover copy.
How the Synopsis Generator Works
Paste Your Story Details
In the form panel, paste your full plot summary, story outline, chapter breakdown, or any detailed description of your narrative. The more complete your input — characters, conflicts, turning points, and resolution — the more accurate and polished the output will be. The AI synopsis maker reads your story and restructures it into professional synopsis format. If you are still developing your story, use the plot generator or free AI story generator to build out your narrative first.
Choose Synopsis Type
Select from five formats: Book Synopsis for Agents, Movie Synopsis, Short Story Synopsis, Screenplay Synopsis, or Back-Cover Blurb. Each format follows different conventions. A book synopsis for agents includes the ending and uses a professional narrative tone. A back-cover blurb withholds the resolution and uses marketing language designed to persuade browsers to buy. A screenplay synopsis follows three-act structure with active scene descriptions.
Get a Polished Synopsis
Click Generate Synopsis and receive a professionally structured synopsis tailored to your selected type and length. The output uses present tense, active voice, and focuses on the main plot thread and protagonist arc. You can copy the result, continue the chat to request revisions, ask for a shorter version, or request a different tone or emphasis.
Synopsis vs Blurb vs Query Letter
What Agents Want in a Synopsis
Literary agents use the synopsis to evaluate whether a story is structurally sound before requesting the full manuscript. They want to see that the plot has a clear inciting incident, escalating conflict, meaningful stakes, and a satisfying resolution. The protagonist must change — the character arc must be visible in the synopsis, not just hinted at. According to Jane Friedman's guide on how to write a synopsis, agents often request the synopsis after they have read and liked your query — so it must be as polished as your manuscript.
The Back-Cover Blurb Format
A back-cover blurb is a short marketing piece of 100-200 words that introduces the protagonist, sets up the central conflict, and ends with a hook that compels the reader to open the book. Unlike a synopsis, it never reveals the ending. It focuses on voice, tension, and intrigue. The blurb is written for readers browsing in a bookstore or scrolling through an online store — not for agents evaluating plot structure. For dedicated blurb writing, try the free blurb generator.
Screenplay Synopsis Conventions
A screenplay synopsis — sometimes called a treatment summary — is written in present tense, active voice, and covers all three acts. It describes scene sequences in terms of action and character decision-making, not dialogue. The protagonist's external goal and internal need are both tracked. Production companies and contest submissions often require a one-page or two-page synopsis alongside the script. For detailed guidance on screenplay formatting conventions, see Script Reader Pro's screenplay synopsis guide.
How to Write a Great Synopsis
Include the Ending
The most common mistake writers make in synopses is withholding the ending. Agents explicitly need to know how your story resolves. A synopsis that ends with "and she must make the hardest decision of her life" tells an agent nothing useful. State what decision she makes, what happens as a result, and how the protagonist is changed. The synopsis is not a marketing pitch — it is an editorial document.
Focus on the Main Plot
A synopsis is not a chapter-by-chapter breakdown. It covers the main narrative spine: the setup, the central conflict, the midpoint shift, the darkest moment, and the resolution. Subplots appear only when they are essential to understanding the main plot. Secondary characters are named only when they directly affect the protagonist's journey. Every sentence must earn its place.
Show Character Arc
The synopsis must show how the protagonist changes from page one to the final scene. What does she believe at the start that turns out to be wrong? What does she learn? What does she sacrifice? Character arc is what separates a story from a sequence of events. Agents assess whether a manuscript is emotionally complete by looking for this transformation in the synopsis.
Keep It Concise
Even a full-length synopsis should be no more than two pages. Use active verbs and present tense. Avoid adverbs, adjectives, and any language that tells the reader how to feel rather than what happens. Cut backstory unless it is essential. One clean, declarative sentence is always better than three descriptive ones. For QueryShark query letter and synopsis advice, the blog consistently emphasizes clarity, specificity, and confidence in the writing.
Synopsis Examples
Example 1 - Novel Synopsis for Agent Query
Type: Book Synopsis for Agents | Length: Standard (250 words) | Genre: Literary Thriller
"MARA COLE is a forensic linguist who has spent fifteen years building walls. When she is called to analyze ransom notes in a series of high-profile kidnappings, she recognizes the syntax patterns as her own — lifted from research she published a decade ago. The kidnapper is using her methodology as a blueprint.
As Mara works with Detective RAY SUAREZ, she discovers that three of the five victims attended the same academic conference where her research was first presented. The fourth victim is her estranged sister. Now the case is personal and her professional objectivity is gone.
Mara follows the linguistic trail to PROFESSOR ELLISON GREY, a former colleague she had discredited in a peer review. Grey is not the kidnapper — he is the next target, placed there to implicate Mara. The true kidnapper is DANA Walsh, a former student whose family was destroyed by one of Mara's early case testimonies. Dana is not after money. She wants Mara to feel what it means to be blamed for something she did not do.
Mara turns herself in as the final trade: her freedom for her sister's life. But she has left a forensic trail of her own — one that leads Suarez directly to Dana's location. Dana is arrested, Mara's sister survives, and Mara begins the slow process of understanding the cost of certainty."
Example 2 - Movie Synopsis
Type: Movie Synopsis | Length: Short (100 words) | Genre: Drama
"THOMAS, a retired architect, returns to his childhood home in rural Vermont to settle his late mother's estate. What he expects to take three days takes three months. The house is structurally unsound. The neighbors are hostile. And buried in the walls, he finds blueprints for a building his mother designed — and was never credited for — in 1962. As Thomas fights to have her work recognized by the architecture board, he confronts the truth about why he left home and never came back. He leaves having finally understood her. He stays to finish what she started."
What Makes a Strong Synopsis
A strong synopsis does four things: it identifies the protagonist and their goal in the first sentence, establishes the central conflict and stakes in the opening paragraph, shows the story's turning points with cause and effect, and delivers a clear, decisive ending. Every sentence should advance the narrative. No sentence should describe tone, theme, or emotion without grounding it in action.
For writers working on their first novel, the synopsis is often harder to write than the manuscript itself. The free AI novel generator can help you develop a full narrative, while the AI character description generator helps you articulate your protagonist's traits before you try to summarize their arc. Once your synopsis is complete, the book title generator can help you finalize the name before querying.
Book Synopsis Generator for Different Genres
Literary Fiction
Literary fiction synopses require special attention to character interiority and thematic depth alongside plot. Agents for literary fiction want to see that the internal and external journeys are intertwined — that what happens to the protagonist in the world mirrors what shifts inside them. Keep the prose clean and avoid over-explaining theme.
Genre Fiction (Thriller, Fantasy, Romance)
For genre fiction, plot mechanics take precedence. Thriller synopses must convey escalating tension and the reveal logic. Fantasy synopses must efficiently convey the world's rules without lengthy exposition — ground the world-building in what the protagonist needs and faces. Romance synopses must show both the relationship arc and the emotional conflict that keeps the protagonists apart, with the resolution of the central tension clearly stated.
Short Story Synopsis
A short story synopsis is typically 100-150 words. It covers the premise, the central conflict, and the ending in compressed form. For flash fiction or short stories submitted to literary magazines, the synopsis is sometimes replaced by a cover letter with a brief pitch paragraph. This tool's "Short" length option is well-suited for short story submissions.
Frequently Asked Questions
Is this synopsis generator free?
Yes, completely free with no signup required. Generate as many synopses as you need across any genre, format, or length without any payment or account creation.
Should a synopsis reveal the ending?
Yes — always. A synopsis written for agents or publishers must include the resolution. Only a back-cover blurb withholds the ending. Agents cannot evaluate your story's structure without knowing how it concludes.
How long should a book synopsis be?
Most agents request one page (250-300 words) or two pages (500-600 words). Always check the submission guidelines of each agent before querying. This tool lets you choose short, standard, detailed, or full-length output to match those requirements.
Can it write a back-cover blurb?
Yes. Select Back-Cover Blurb from the synopsis type dropdown. The AI generates a short, hook-driven marketing description with no spoilers, strong voice, and a compelling ending hook. For more blurb options, the free blurb generator is also available.
Does it work for screenplays?
Yes. Select Screenplay Synopsis from the type dropdown. The output follows screenplay conventions: present tense, active voice, three-act structure, and focus on external goal and internal need. It works for feature films, short films, and TV pilots.