How to Write an Author Bio With AI That Readers Trust

What is Built&Written? Built&Written is a platform for writing and publishing nonfiction books. Its AI writes a book from material you already have, like posts, notes and talk transcripts, in your voice. If your book is already written, it lays the file out for print without changing a word. On a paid plan, you download a print PDF and files for KDP (Kindle Direct Publishing, Amazon's self-publishing service) and publish the book yourself. AI-written books download on Entrepreneur and up.

Key takeaways

• Where does the bio go in Built&Written? On the About the author page in the back matter (the pages after the last chapter), and you can leave it out.
• How long should a back cover bio be? 50 to 75 words. Claude and ChatGPT landed there, and Easy-Peasy.AI wrote 173.
• Which tool made up a story? AuthorWings opened one of its three bios with an origin story we never gave it.
• Do free author bio generators work? Not all of them. Of the 5 bio generators we tried, 2 gave no bio: one showed an error in our headless browser, and one wanted an account.

What does an author bio generator do?

An author bio generator, or AI bio generator, is an AI tool that turns a few facts about you into a short paragraph for your book. It's a form with fixed fields: you fill in your name, your work and your book, and it writes the bio. A chatbot like ChatGPT works differently. It takes any instruction you type.

An author bio is the short paragraph about you. It appears on the back cover, on the About the author page at the end of the book and on your Amazon page.

For an expert, the bio does one job: it tells the reader why to trust you on this subject. That's why a single wrong number matters. A client who knows you started 9 years ago may start to doubt the rest of the book when the bio rounds it up.

How Built&Written handles your author bio

In Built&Written, the About the author page sits in the book's back matter, and it's a plain text box.

• You write it. The box says "A short bio for the 'About the Author' page (optional)." You type the bio yourself.
• It's optional. The label reads "Prints at the back of the book. Optional." You can leave it empty.
• Your words only. Built&Written doesn't rewrite your bio, so nothing gets added that you didn't say.

You can still use any AI tool from the test below for a first draft.

We tested 7 AI tools on one test author. Here's what changed

We tried 7 AI tools, 2 chatbots and 5 bio generators, and asked each for a third-person bio (written as "she", not "I") for a back cover. Five of them wrote one.

How we tested:

• Date: November 4, 2026.
• Test author: Dana Ortiz, invented for the test. She is not a real person. Her 6 facts: operations consultant for small software companies, 9 years of experience, about 40 companies helped with hiring, the book Hire Slow, Grow Fast (a guide to hiring your first 10 people), Denver, and two dogs.
• Same request: the chatbots got one prompt asking for 50 to 75 words using only these facts. In each generator's form, we typed the same facts where it had a field for them and chose third person and a short length where it offered them.
• Accounts: Claude ran on a paid plan. Every other tool ran without an account. Each tool ran once, and a second run may differ.
• Built&Written: we checked the About the author box in our own product on a paid plan. It has no generator, so it isn't scored.
• BookBeaver: its form asks for genre, influences and hobbies, so most of our facts had no field. It ran in a headless browser (one that runs without a window).
• Easy-Peasy.AI: no length setting. It ran in a headless browser.
• Originality.ai: no length setting, and it would not run until we filled its "Talking Points (optional)" field, so we typed "back cover bio".
• AuthorWings: it showed "Verification failed" in a headless browser, then ran in a regular browser window with no check shown.
• Hypotenuse: it asked for an account in a headless browser, and we didn't create one.

Tool	Words	Facts kept (of 6)	Facts changed	Claims added	Praise added
Built&Written	you write it	n/a, no generator	n/a	n/a	none, your own words
Claude	51	6	0	none	none
Free ChatGPT	58	6	0	an audience, "founders and leaders"	mild
AuthorWings (3 bios)	59, 60, 65	5, 4, 4	1 (bio 1)	an origin story (bio 3)	some ("hard-won lessons")
Easy-Peasy.AI	173	6	0	more books ("guides"), a motive, "upcoming projects"	some
Originality.ai	118	4	2	"thriving enterprises"	heavy

A fact counts as kept only if its meaning is unchanged. Praise means words about Dana that add no fact, like "impressive" or "a catalyst for growth".

Two more generators gave us no bio. On November 4, 2026, BookBeaver showed an error in our headless browser, "Webhook is temporarily disabled." We didn't retry it in a regular window. Hypotenuse asked for an account before it would write.

Which author bio generator kept to the facts?

The chatbots did best. They also got an instruction the forms can't take: use only these facts, in 50 to 75 words. The form-based generators added the most.

Claude: all 6 facts, nothing added

Claude wrote 51 words, inside the 50 to 75 we asked for. It kept all 6 facts and added nothing. We ran it on a paid plan, so it isn't a free option.

Text in the image: Dana Ortiz author bio. Write a third-person author bio for the back cover of my book, 50 to 75 words. Use only these facts: Dana Ortiz is an operations consultant for small software companies. She has 9 years of experience and has helped about 40 companies with hiring. Her book is Hire Slow, Grow Fast, a practical guide to hiring your first 10 people. She lives in Denver with her two dogs. Checking the bio's word count and facts. Dana Ortiz is an operations consultant who works with small software companies. With 9 years of experience behind her, she has helped about 40 companies with hiring. Her book, Hire Slow, Grow Fast, is a practical guide to hiring your first 10 people. She lives in Denver with her two dogs.

Free ChatGPT: accurate, with a little polish

Free ChatGPT wrote 58 words without an account. It kept every fact and added no credentials. It did add soft phrases like "build strong, effective teams" and "navigate the challenges of hiring", and it named the book's readers as "founders and leaders". Those phrases add no facts about Dana.

AuthorWings: three versions, one invented story

AuthorWings gave three short bios. It suggests its Long setting (150 to 300 words) for back covers; we picked Short to match a 50 to 75 word back cover. The first kept the other 5 facts but turned "helped about 40 companies with hiring" into "about 40 hiring engagements". The second and third dropped Denver and the dogs. The third opened with a story we never gave it: "After seeing how quickly a rushed hire can stall a growing product team, Dana Ortiz built her consulting work around..."

Its "Credentials, Achievements, or Relevant Experience" field suggests examples like "keynote speaker at SXSW" and "MBA from Wharton". Put only your real credentials there.

Text in the image: Result. Bio 1: Short (40-80 words) · for social bylines (target 60). Dana Ortiz is an operations consultant who helps small software companies build teams that scale. With nine years of experience and work across about 40 hiring engagements, she focuses on the practical decisions founders face when making their first ten people hires. Ortiz is the author of Hire Slow, Grow Fast. She lives in Denver with her two dogs.

Easy-Peasy.AI: 173 words and extra claims

Easy-Peasy.AI gave one free run a day. It wrote 173 words, more than twice the back cover length. Its form has no length setting, and we didn't type a length into its text fields. It kept every fact. It also implied more than one book: Dana "writes practical, no-nonsense guides", though we gave one. It added a motive, "She wrote the book she wishes her clients had on day one". It ended with "Connect with Dana online to learn more about her work and upcoming projects."

Originality.ai: the numbers moved

Originality.ai wrote 118 words. It is the only tool that changed a number: 9 years became "a decade of expertise" and "about 40" became "over 40". It also called Dana "a catalyst for growth in the ever-evolving tech landscape".

Text in the image: Result. Dana Ortiz is a dynamic operations consultant with a decade of expertise in transforming small software companies into thriving enterprises. With an impressive track record of guiding over 40 companies through the hiring process, her insights are invaluable for startups looking to scale. In her compelling book, Hire Slow, Grow Fast, Dana distills her extensive experience into a practical guide for bringing on the first ten crucial team members, empowering entrepreneurs to build strong foundations for success. Residing in the vibrant city of Denver, she enjoys life with her two dogs, embodying the perfect blend of professional acumen and personal passion. Dana Ortiz is not just a consultant; she's a catalyst for growth in the ever-evolving tech landscape. Words: 118. (The result shows asterisks around the book title.)

How to check an AI-written bio before you publish it

Check an AI draft against your real record, line by line. These five steps would have caught every change we saw in the test.

1. Circle every number. Years, clients, books, revenue. Each one must match your real record exactly.
2. Underline every adjective about you. Words like "dynamic", "impressive" and "renowned" are claims. Keep only the ones a client would agree with.
3. Delete anything you didn't say. Stories, motives, awards and "upcoming projects" the tool invented go first.
4. Count the words. Cut to 50 to 75 words for the back cover. For the page inside the book, aim for 100 to 200 words.
5. Read it out loud. If it sounds like a press release, rewrite it in the words you'd use with a client.

For the full set of rules on length, first or third person and what to include, see our About the Author examples. For your Amazon page, our Amazon Author Central guide explains how to set up your author profile, bio included.

Do you have to disclose AI if you use it for your author bio?

On KDP, it depends on how much the AI wrote. KDP's content guidelines ask you to tell Amazon about AI-generated text, images and translations, and they name cover images. They don't name the author bio. We treat an AI-written bio the same way, on the back cover or inside the book.

What you did	What KDP calls it	Do you tell KDP?
You wrote the bio yourself	No AI used	No
You wrote it, AI fixed the grammar	AI-assisted	No
AI wrote it from your facts, you edited it	AI-generated	Yes

KDP counts text as AI-generated even if you edited it a lot afterwards. So if a tool from the test wrote your bio, we would answer yes to KDP's AI question. Our guide on whether you can publish an AI-written book on KDP explains that checkbox.

Final thoughts

With Built&Written, you write the About the author page yourself, so every claim in it is one you chose. See how it works.

The AI tools are useful for a first draft, as long as you hold every claim to your real record.

What Built&Written gives you here:

• Your bio, your call. You type it, or you leave the page out.
• Your finished bio, kept word for word. Upload your finished manuscript (the full text of your book), and its About the author page comes in as written.
• The rest of the book from your material. Bring posts, notes or transcripts, and the AI writes the chapters in your voice. Voice DNA learns it from 5 to 50 pages of your writing.