Pure Client-Side SaaS Engine

Compile Print-Ready KDP Covers
With Absolute Mathematical Precision

Generate Amazon KDP compliant wrap-around paperback covers instantly in your browser. Auto-calculate spine widths, sample edge palette colors, and dynamically embed custom Google Fonts.

CoverStudio Book Wrap Blueprint Mockup
Features

Engineered for KDP Publishers

Everything you need to bypass Amazon's strict production review filters.

Instant Browser Generation

All PDF compiling executes directly in your browser using `pdf-lib`. No file upload limits, zero waiting on remote servers, and prompt local compilation.

Smart Color Edge Sampler

Upload your front cover artwork, and CoverStudio automatically extracts the exact edge colors to paint your spine and bleed gutters seamlessly.

Spine Math & Bleed Control

Input your page count and paper type. Our engine automatically calculates spine thickness down to four decimal places, snapping guides at 0.125 inches.

Google Fonts Typography

Select from a curated collection of Google Fonts. Load typography dynamically into the live preview, and embed the `.ttf` directly into the final PDF.

Workflow

Get Print-Ready in Minutes

Four simple steps to format your wrap-around book cover.

01

Upload Covers

Drag and drop your front and back cover graphics into our interactive canvas boxes.

02

Set Specs

Specify page count, trim size, and paper type (white, cream, color) to auto-adjust dimensions.

03

Style spine & Font

Pick a custom background color and choose a Google Font for your spine text.

04

Download PDF

Compile a flat, print-ready PDF containing embedded fonts and strict trim dimensions.

Pricing Models

Sleek, Transparent Plans

Select the tier that matches your publishing schedule.

MonthlyYearly Save 20%
Active Plan

Free Starter

Perfect for testing layouts and calculating precise trim templates.

$0/ forever
  • 3 PDF generations total
  • Up to 3 saves in cloud catalog
  • Paperback templates only
  • Up to 150 page limit
  • Standard typography
  • Client-side processing
Most Popular

Pro Creator

Designed for active independent authors and content creators.

$9/ month
  • 100 PDF generations / month
  • Unlimited cloud catalog saves
  • Paperback & Hardcover templates
  • Up to 800 pages (KDP Max)
  • All Google Web Fonts integrated
  • Priority email support

Enterprise

Built for bulk design agencies and large independent studios.

$24/ month
  • Unlimited PDF generations
  • Unlimited cloud catalog saves
  • Paperback & Hardcover templates
  • High resolution CMYK printing
  • Full access to Google Web Fonts
  • Dedicated 24/7 account manager
FAQ

Frequently Answered Questions

Quick resolutions to structural cover calculations and licensing queries.

Unlike standard converters, all compiling executes directly in your browser using client-side WebAssembly and high-performance `pdf-lib` libraries. Your manuscript graphics never leave your computer, ensuring 100% data privacy and instant rendering times.

Our calculations strictly follow the official KDP publishing equations down to four decimal places. For white paper, we use `pages × 0.002252 in`. For cream paper, we use `pages × 0.0025 in`. The canvas adjusts pixels dynamically to make sure you pass the review on your first try.

Yes! Upgrading to our Pro Creator or Enterprise tiers allows you to pick from a curated library of premium Google Fonts. These web fonts load on the canvas dynamically and are embedded directly as subset files inside the final print-ready PDF.

We support all standard Amazon paperback trim sizes (such as 6"x9", 5.5"x8.5", 8.25"x6", etc.) and case laminate hardcover templates. Bleed zones are automatically mapped at the default 0.125" margins.

The Free Starter tier lets you test covers up to 150 pages. The Pro Creator tier extends this to 800 pages (the absolute maximum allowed by KDP standard bindings), and the Enterprise tier supports any document configurations.

Security & Efficiency

Local & Serverless.
Your Manuscripts are Safe.

Unlike traditional online PDF compilers, CoverStudio processes all images and compiles document binaries directly inside your sandbox memory. Your source graphics never hit a cloud database.

  • 100% data privacy — files never leave your computer
  • Zero server upload or download wait times
  • Permanent compliance with Amazon KDP print requirements
100%Client-Side Private
0sUpload Wait Time

Compile Cover Templates in Seconds

Bypass Amazon KDP's strict preview filters with mathematically validated templates generated directly in your browser.

Get Started Free