Now with Fidelity Modes & Writing Styles

One YouTube video.
A fully written ebook — your way.

TubeBook doesn't transcribe — it writes a complete book from your video. Choose how closely to follow the source, pick a writing style, set your word count, and approve the outline before a single credit is spent.

Generate Your First Ebook Free See fidelity modes

Free plan · No credit card · Approve outline before generating

youtube.com/watch?v=
📖 Ebook
Fidelity mode
Low — Commercial Ready
Writing style
✦ Professional
🎬Analyse
⚙️Configure
📋Preview TOC
✍️Write
📄Export

Built on world-class infrastructure

Gemini 2.5 Pro
Supabase
Cloudflare Workers
Stripe Payments
TanStack Start

Five steps, one publishable book

You approve the structure before a single word is written. No surprises, no wasted credits.

01

Paste Your URL

Drop in any public YouTube video. TubeBook reads it natively via Gemini — no manual transcript needed.

02

Analyse & Score

AI scores the video's "Data Density" and suggests an optimal word count so you know what to expect before committing.

New
03

Configure Your Book

Choose fidelity mode (High / Smart / Low), writing style, and target word count — before any generation begins.

New
04

Preview & Approve TOC

Review the AI-generated chapter structure. Edit or reject chapters freely. Your credit is only spent once you confirm.

New
05

Download Your Ebook

A formatted PDF with AI cover, chapter illustrations, and your chosen fonts — ready to publish or share.

How closely should your ebook follow the video?

Three modes. Three legal postures. You choose how original the output needs to be.

High Fidelity

Your video, word-for-word structure

The ebook follows the exact structure, names, stories, and ideas of your transcript — ideal for repurposing your own content into a book.

Repurpose your own YouTube channel
Course material → companion guide
Lecture series → printed textbook
⚠ You must own the rights to the source video. Distributing High Fidelity output from third-party content without permission is copyright infringement.
Smart Adapt (default)

Same ideas, rebuilt structure

The AI rewrites and restructures the source — names may change, flow is rebuilt, but the core content stays close to the original.

Refresh older content for a new brand
Adapt a tutorial into a how-to guide
Repackage interviews into case studies
Low Fidelity

Inspired by the video, truly original

The video is a thematic seed only. The AI generates substantially original content — names, structure, and wording are all new. Safe for KDP, Gumroad, and commercial publishing.

Sell on Amazon KDP
Publish on Gumroad or your own site
Generate ebooks from any public video
💡 To fully own the copyright, add your own insights to the AI draft before publishing. Human editing is what creates authorship.

Know what you're getting
before you generate

After you paste a URL, TubeBook scores the video's content density and suggests an optimal word count. If your targets are mismatched — a short video with a 25k-word output — we warn you before you commit.

1
Data Density score
How much substantive content the video contains — the stronger the score, the higher the quality you can expect at your chosen word count.
2
TOC preview before generation
Approve the chapter outline before any credit is charged. Edit or reject chapters freely at this stage.
3
Word count you control
Output size is set by you — not the video length. A 5-minute video can produce a 5,000-word guide or a 25,000-word book if the content is rich enough.
Analysis Preview — youtube.com/watch?v=xK2uOq…
Data Density10 / 100
Estimated unique concepts47
Suggested word count range12k – 28k
Generated Table of Contents
1
Introduction — Why This Matters Now
2
The Core Framework Explained
3
Step-by-Step Implementation
4
Common Mistakes and How to Avoid Them
5
Advanced Strategies & Next Steps
Choose target output
Lead Magnet
~5,000 words
Full Book
25,000+ words
⚠ This video is short. A 25k-word output may result in repetitive content. We recommend Lead Magnet for best quality.

Your book, your voice

Choose the writing style that fits your audience before generating. The AI adapts its tone, vocabulary, and structure accordingly — from academic rigor to casual storytelling.

Professional
Conversational
Stoic
Scientific
Narrative
Academic
Motivational
Minimalist
✦ Professional
Sample paragraph — Chapter 2
The Core Framework Explained
The following framework provides a systematic approach to optimising your workflow. By implementing these evidence-based methodologies, organisations can achieve measurable improvements in operational efficiency.

Click any style to preview the AI's tone

Everything you need to
publish like a pro

Gemini 2.5 Pro Writing

State-of-the-art AI reads your video natively and writes a structured book — coherent, publication-ready prose, not a transcript dump.

3 Fidelity Modes New

High Fidelity for content repurposing, Smart Adapt for brand refresh, Low Fidelity for fully commercial-ready original ebooks — legal clarity built in.

8 Writing Styles New

Professional, Conversational, Stoic, Scientific, Narrative, Academic, Motivational, Minimalist — chosen before generation so the AI writes in your voice from page one.

Data Density Analysis New

Before you commit a credit, see a score for your video's content richness, a suggested word count range, and a warning if your targets are mismatched.

TOC Preview & Approval New

Review and edit the full chapter structure before generation starts. No credit is spent until you've approved the outline.

You Control the Word Count

Output length is set by you — not by the video. A 5-minute video can produce a 5,000-word guide or a 25,000-word deep dive if the content supports it.

Live Progress Dashboard

Watch your ebook generate in real time. The dashboard polls every 3 seconds showing the active pipeline step and progress percentage.

AI Cover & Illustrations

Gemini 3 Pro Image generates a custom cover and unique per-chapter illustrations that match your content's theme and fidelity mode.

Secure & Private

All files in private owner-scoped buckets. Row-level security on every database table. Your content is yours alone — always.

Creators love TubeBook

★★★★★
Low Fidelity — KDP

I used Low Fidelity mode on a public finance video and got a 22,000-word ebook I'm now selling on Amazon KDP. The writing style I picked matched my brand perfectly.

JM
James M.
Finance Educator, 180K subscribers
★★★★★
High Fidelity — Repurpose

I repurposed my entire 40-video training series using High Fidelity mode. Each video became a chapter. My own content, finally in a book.

SR
Sofia R.
Business Coach & Author
★★★★★
Smart Adapt — Lead Magnet

The TOC preview changed everything — I edited two chapters before approving and the final ebook was exactly right. My email list grew 3× in two months.

AT
Alex T.
Developer & Course Creator

Simple, honest pricing

All plans include fidelity modes, writing styles, Data Density analysis, and TOC approval. Priced by output size.

Free
$0
Up to 5,000 words

Try the full pipeline once — analysis, TOC preview, all fidelity modes and writing styles included.

  • 1 lead magnet (lifetime)
  • All 3 fidelity modes
  • All 8 writing styles
  • Data Density analysis
  • TOC preview & approval
  • AI cover + PDF download
  • Commercial ebooks (25k+)
  • Chapter illustrations
Get started free
Starter
$9/mo
Up to 5,000 words each

For creators regularly converting content into lead magnets, quick guides, and whitepapers.

  • 10 lead magnets/month
  • All 3 fidelity modes
  • All 8 writing styles
  • Data Density analysis
  • TOC preview & approval
  • Chapter illustrations
  • No watermark
  • Commercial ebooks (25k+)
Start Starter

14-day refund on first subscription (fewer than 3 ebooks generated) · Cancel anytime

Your next ebook is
one URL away

Pick your fidelity mode, choose your writing style, approve the outline — then let TubeBook write the book.

Create Your Free Ebook →

Free plan · No credit card · Approve the outline before generating