A blurb is the most important piece of sales copy that most authors ever write. It appears on the back cover and on the store page, and in a few seconds it decides whether a reader who likes the cover and the title will take the next step. Good blurbs share a pattern. They open with a hook, show a character with something to lose, make clear what is at stake and end with a reason to turn the page. Weak blurbs summarise the plot, run too long or lean on phrases that readers have seen a thousand times.
Free tool · Book Blurb Analyzer
Book Blurb Analyzer that shows what your blurb does well and where it loses a reader
The book blurb analyzer reads the book description that you paste and checks it against six points: length for your type of book, the length of the opening hook, the average sentence length, the reading grade, whether it signals the stakes or speaks to the reader and whether it uses overused phrases, then gives a score out of 100 and a checklist of what to improve. It runs in your browser, keeps your text on your device and is free.
Use the free tool
The book blurb analyzer is free to use, with no account and nothing uploaded.
- Length and hook check
- Readability and clichés
- Checklist and score
Key facts
- FreeNo cost, no account and no usage limit on the book blurb analyzer
- In your browserNothing that you type or paste into the book blurb analyzer is uploaded
- SecondsTypical time from opening the book blurb analyzer to a result
Free tool
Book blurb analyzer
Paste your book description to check its length, its opening hook, its readability and common weak spots, and get a checklist of what to improve.
The book blurb analyzer needs JavaScript, and it works in your browser without sending anything that you enter to a server.
Overview
What the book blurb analyzer does and why it helps
The analyzer checks the things that can be measured. It counts the words and compares them with a typical range for your kind of book, roughly 120 to 200 words for fiction, 100 to 250 for nonfiction and 50 to 120 for children's books. It measures the first sentence, because a hook of 25 words or fewer is easier to take in, and the average sentence length, because short sentences scan better on a phone. It estimates the reading grade, looks for words that signal stakes in fiction or direct address in nonfiction and flags clichés such as a race against time or heart-pounding.
The score is a simple checklist and not a prediction of sales. A blurb can pass every check and still be dull, and one that fails a few checks can be gripping. Use the results as an editor would use a margin note: they point to places to look. A strong blurb also needs a clear signal of genre, a specific character and a promise that readers of your genre want, and those depend on your judgement and on how well you know your readers.
The book blurb analyzer checks your blurb for length, hook, readability and key elements. Authors can use this free book blurb analyzer as often as they like, and it never asks for payment. It runs as a book blurb analyzer online, so a laptop, tablet or phone is all you need. Use it as a book blurb analyzer free online whenever you are mid-project. It is a book blurb analyzer for authors, so the defaults assume you are preparing a book rather than a business report. It also serves as a book blurb analyzer for self-published books, whichever store you publish through. It doubles as a book blurb analyzer for KDP, because the figures it uses match Amazon's rules. It is a book blurb analyzer no sign up tool, so there is nothing to register. Treat it as a book blurb analyzer tool for writers who would rather not wade through jargon. We cannot say what the best book blurb analyzer is for everyone, but we have made this one show its working so you can trust the answer.
How to use it
How to use the book blurb analyzer, step by step
Paste your description
Copy the blurb or book description into the box. Use the version that readers will see on a store page or a back cover, not an earlier draft.
Choose your type of book
Select fiction, nonfiction or another type. The recommended length and the checks differ for each, so the tool needs to know which you are writing.
Press analyse
The tool checks six points: length for your type of book, the length of the opening hook, the average sentence length, the reading grade, whether the stakes are signalled and whether clichés appear.
Read the score
A score out of 100 summarises the result. Treat it as a quick indicator, and read the checklist below it to understand what to change.
Work through the checklist
Each point shows what passed and what to improve, such as a hook that is too long. Start with the point that looks most serious.
Revise and recheck
Edit the blurb and run the tool again. When the checks pass and the blurb reads well aloud, stop revising. If a value looks wrong, change it and read the result again; the book blurb analyzer never stores or uploads what you enter.
How the book blurb analyzer works
A checklist that a bookseller would recognise
Paste your blurb, choose fiction, nonfiction or children's, and the tool measures its word count, the length of the first sentence and the average sentence length, and estimates the reading grade. It looks for signs of stakes in fiction, direct address in nonfiction and a list of overused phrases.
It then scores the blurb against six checks: length for the type of book, a first sentence of 25 words or fewer, an average sentence length under 22 words, a reading grade of 9 or below, stakes or direct address and the absence of cliché phrases. The score is a quick guide, not a prediction.
A blurb also needs a clear genre signal, a specific character and a reason to turn the page, and a tool cannot judge those. Use the checklist to find the mechanical problems, then read the blurb aloud and ask whether it makes you want to read the book.
- Six checks for each type of book
- Overused phrases flagged
- A score and a short checklist
Method
How the book blurb analyzer works out its answer
Length by type of book
The word count is compared with a range for the genre option you choose, 120 to 200 words for fiction, 100 to 250 for nonfiction and 50 to 120 for children's books.
The hook
The first sentence should be 25 words or fewer, since a short opening is quick to take in on a phone screen and in a search result.
Sentence length and reading grade
The average sentence should be about 22 words or fewer, and the Flesch-Kincaid grade should be about 9 or below, so that the blurb is easy to scan.
Stakes and clichés
For fiction the tool looks for words that signal what is at stake, such as must, before, only, never and last. For nonfiction it looks for direct address with you or your. It also flags overused phrases such as in a world, race against time and thrilling ride.
Tips
Getting the most from the book blurb analyzer
Open with a hook
Make the first line carry the main promise of the book, in about twenty words or fewer. The book blurb analyzer is free and instant, so it is worth running again whenever your book changes.
Show the stakes
Say what a character or a reader could gain or lose. Without stakes, a blurb reads like a summary. Make the book blurb analyzer a routine step on every project, so that results stay consistent from book to book.
Cut clichés
Replace overused phrases with specific details from your book. Specific words are more believable and more memorable. A few minutes with the book blurb analyzer now saves time across the whole manuscript.
Need it done for you?
When the book blurb analyzer is not enough
The analyzer helps you sharpen the blurb. These services put it where readers will see it, on the back cover, in your store listing and on a page of its own.
Book Back Cover Design
A back cover designer sets the blurb, the praise and the barcode so that the text is easy to read and the page looks balanced.
See the service →Book Metadata Setup
Metadata setup places your description on every store page with the formatting each platform allows, so that the blurb reads well wherever it appears.
See the service →Book Landing Page Design
A landing page gives the blurb room to work, with a hook, praise and a sample chapter that support the same promise.
See the service →Before and after
Before and after using the book blurb analyzer
The same book, first with a blurb that told the plot and then with a description that sells the situation and the stakes.
123Before
- 1A blurb that runs far too long
- 2A first sentence nobody can read at a glance
- 3Clichés that make the book sound familiar
123After
- 1A blurb in the right range for the genre
- 2A short hook that works on a phone
- 3Specific details in place of the clichés
- 3problems found in the first review
- 3fixes checked in the final review
- 1named specialist owning every fix
- Fixedprice confirmed in the calculator before you order
A readable opening
A short first sentence works on a small screen, so more browsers stay to read the rest.
Clear stakes
Readers see what the character stands to lose, which is the reason that they keep reading.
A fresh voice
Specific details replace stock phrases, so the book sounds like itself and not like every other title.
Client reviews
What authors say about our blurb edit service
Verified reviews from authors who asked a specialist to handle the blurb edit after using the book blurb analyzer.
As a first-time author, the technical side of self-publishing was genuinely daunting. The consultation covered every decision — platform choice, pricing strategy, metadata, and distribution. I launched with genuine confidence.
Navigating IngramSpark's requirements for the first time felt overwhelming. The upload assistance handled everything — metadata, pricing setup, distribution channels. My children's book reached bookstores within two weeks.
The formatting error fix service saved my launch. My original formatter had made margin errors causing repeated rejection. Book Formatting Experts identified and fixed every issue within 48 hours. My launch was back on schedule.
My YA novel needed to reach both English-language and Japanese readers. The multi-region distribution setup was handled correctly across all required platforms. International sales have exceeded my expectations.
Good support throughout the KDP upload process. The metadata setup and category selection were explained clearly. One pricing setting needed adjustment after initial setup but it was corrected quickly.
Good publishing support overall. The KDP metadata setup was thorough. One category selection needed updating after initial launch but it was corrected promptly. The book is performing well in its target categories.
My KDP file was rejected with a technical error message I could not understand. Book Formatting Experts diagnosed the problem immediately — a bleed issue on three pages — and corrected it the same day. Approved first time.
Getting historical fiction placed in the right categories on Amazon and IngramSpark required strategic metadata. The team understood the genre classification and the book reached the right readers from the first week.
The publishing readiness review identified four issues in my manuscript that would have caused rejection. Each was clearly explained and quickly resolved. My book launched without any technical complications.
My cookbook needed to be set up across multiple platforms simultaneously. The publishing support team handled every submission — KDP, IngramSpark, and Apple Books — with different requirements for each. Flawlessly executed.
My spiritual book had Arabic quotations alongside English text. The bidirectional text layout was handled correctly and respectfully. The result reads clearly in both languages and the overall design is dignified.
My historical novel had period-appropriate chapter epigraphs and an author's note section. Every element was formatted with understanding of the genre's conventions. My literary agent commented on the professional quality.
Every genre convention was applied correctly. The chapter openers, the dedication page, and the acknowledgements all flowed naturally. Readers have complimented how comfortable the book feels to read.
My fantasy EPUB had complex nested structures with chapter epigraphs and world-building inserts. The EPUB handles every level cleanly and reads beautifully on Kindle and Apple Books.
My world-building sections, map pages, and chapter epigraphs were all handled with genuine understanding of the genre. The interior feels as immersive as the story itself. My readers noticed immediately.
The conversion preserved the structure of my Business manuscript far better than I expected. Tables, headings, spacing, and special sections were cleaned up into a usable professional file.
My business EPUB had tables and callout boxes that needed to be handled carefully. Everything was converted cleanly without losing any structural information. The file passed Amazon's validator on the first check.
My psychological thriller had unreliable narrator chapters that needed specific typographic signals to the reader. Every formatting choice reinforced the story. My beta readers said the book felt cinematic.
More free tools
More free tools to use with the book blurb analyzer
Each of these tools is free, runs in your browser and works well alongside the book blurb analyzer.
Book Description Generator
Free book description generator that works in your browser, plus a done-for-you book description rewrite service with your blurb edit.
Open the tool →Readability Score Checker
Free readability score checker that works in your browser, plus a done-for-you readability edit service for the blurb edit.
Open the tool →Book Keyword Generator
Free book keyword generator that works in your browser, plus a done-for-you keyword research service on this blurb edit project.
Open the tool →Word Count Tool
For your blurb edit, free word count tool that works in your browser, plus a done-for-you manuscript length check service.
Open the tool →BISAC Code Finder
Free bisac code finder that works in your browser, plus a done-for-you BISAC code selection service.
Open the tool →Author Bio Generator
Free author bio generator that works in your browser, plus a done-for-you author bio edit service on this blurb edit project.
Open the tool →FAQ
Book Blurb Analyzer: questions answered
These are the questions authors ask most about the book blurb analyzer, including accuracy, privacy and what to do next. If your question about the blurb edit is missing, request a quote and a specialist will reply.
What is a book blurb analyzer?
It is a tool that checks a book description for length, the opening hook, sentence length, reading grade, stakes and clichés, and gives a score and a checklist.
How long should a book blurb be?
Roughly 120 to 200 words for fiction, 100 to 250 for nonfiction and 50 to 120 for children's books, though practice varies.
What makes a good book blurb?
A short hook, a character with something to lose, clear stakes and a reason to read on, written in plain sentences.
How long should the first sentence be?
About 25 words or fewer, so that it is easy to take in at a glance.
What reading grade should a blurb have?
Blurbs generally read best at about grade 9 or below, because readers scan them quickly.
What are blurb clichés?
They are overused phrases such as race against time, heart-pounding and thrilling ride, which make a book sound like others.
Does the score predict sales?
No. It is a simple checklist of measurable qualities, and a blurb also needs a clear genre signal and a strong promise.
What is the difference between a blurb and a synopsis?
A blurb is marketing copy for readers and sells the situation, while a synopsis is a summary for agents or editors and tells the whole plot.
Can I use it for nonfiction?
Yes. Choose nonfiction, and the tool looks for direct address and a range suited to nonfiction.
Should I include reviews in the blurb?
Praise can be placed above or below the description, so keep the description itself focused on the book.
Does the book blurb analyzer keep anything that I enter?
No. The book blurb analyzer works in your browser, so what you enter stays on your device and is never saved.
Is the book blurb analyzer free?
Yes, the blurb analyzer costs nothing, needs no account and puts no limit on the descriptions you check.
How does a book blurb analyzer work?
It counts words and sentences, checks readability and looks for a hook and a call to action.
How to use a book blurb analyzer?
Paste your blurb and read the report with the suggestions.
Is there a book blurb analyzer with examples?
Yes. The page includes a worked example so you can compare it with your own numbers or text. A sample blurb shows how the feedback looks.
Work with a specialist
Turn what you learn from the book blurb analyzer into a finished book
The book blurb analyzer costs nothing, and so does asking what a specialist would do with your book. When the book blurb analyzer has done its part and you want finished files, a fixed price and one named person who owns the job, we are ready to start.