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Write a back-cover blurb that sells the book.

The back-cover blurb is the hardest 150 words you will write — it has to hook a browsing reader in seconds. Paste a synopsis or your entire manuscript below and get three blurbs, each written from a different angle, free and in seconds. No account needed.

A synopsis works great. Pasting more of the real text helps the blurb match your actual voice.

No signup. No credit card. Three angles in about ten seconds.

Chapter 01·How it works

Three angles, because the first draft is rarely the one.

Professional copywriters never write one blurb. They try the same book a few different ways and pick the one that lands. You get all three at once, then choose, mix, and edit.

Character-led

Opens on the person at the heart of the book and the stake they carry, so a reader cares who this is before they know what happens.

Hook-led

Opens on the central question or the promise of the book — the line that stops a thumb mid-scroll.

Mood-led

Opens on voice, place, and atmosphere — built for literary fiction, romantasy, memoir, and anything sold on feel.

Chapter 02·Why the blurb matters

The blurb does the selling.

A cover earns a glance. The blurb earns the click, the sample, the buy. It is the single piece of copy a reader reads before deciding whether to spend hours and money with you, and most authors write it last, exhausted, in an afternoon.

A good blurb is not a summary. It withholds as much as it reveals, it matches the tone of the category it competes in, and it ends on a question the reader can only answer by opening the book. That is a craft, and it is the one this tool is built around.

Chapter 03·Questions

Good to know.

Is it really free?
Yes. No account, no email, no card. Generate as many sets as you like (with a light limit to keep the bots out).
Can I paste my whole manuscript?
You can. The tool reads the opening to capture your voice and setup, and it is written never to spoil the ending. A synopsis or even a few notes works just as well if that is all you have.
Does it work for non-fiction?
Yes. Memoir, narrative non-fiction, self-help, business, and more. Pick the matching category and the copy adjusts its tone and structure accordingly.
Will my book be used to train an AI?
No. Your text is sent to the model only to write your blurb and is not stored to train anything.
What do I get if I sign up for WriteLoom?
The blurb tool inside WriteLoom pulls from your saved synopsis and characters, lets you refine each draft with plain-language notes, and saves your favorites. It sits next to everything else you need to publish: covers, comp titles, query letters, and a full launch plan. Create a free project.

From blurb to book on a shelf.

WriteLoom is one workspace for the whole journey — writing, editing, pitching, and selling. The blurb is just where it starts.

Start freeSee everything it does →