Context instead of errors
Every blocker explains the reason and the exact next step required.
THE BOOK PRODUCTION SYSTEM FOR AUTHORS
Don’t just write a book.
Make it ready for the world.
epubio connects writing, DOCX import, book design, EPUB validation, print preparation and publication handoff in one guided workspace.
No sales commissionOne-time BookPassGerman & English built in
YOUR BOOK AT A GLANCE01Manuscript02Metadata03Design04Cover
RELEASETWINThe current book statev1.8 · 94/100
OUTPUTSEPUB 3.3Print PDFKDP package
QUALITY GATEKeine Blocker
SCROLL TO EXPLORE
DOCXImport with structure
EPUB CHECKCheck the file reliably
PRINTPrepare the book block
RELEASETWINControl every change
PUBLISHHandoff with confidence
ONE BOOK. TOO MANY DISCONNECTED TOOLS.
The hard part often starts after the writing.
Text editor, formatting, cover, metadata, validation tools, print files and store checklists usually live apart. That creates questions, outdated files and uncertainty exactly when a book should be ready.
One state instead of file chaos
Manuscript, design, cover and editions remain connected and traceable.
Guidance instead of jargon
epubio always shows the next useful step without taking creative decisions away.
EVERYTHING THAT TURNS TEXT INTO A BOOK
Professional book production. One calm system.
01WRITE
Write & structure
Chapters, focus mode, versions and a workspace designed to keep the text at the centre.
02IMPORT
Import DOCX intelligently
Documents are analysed, structured and presented clearly for review before import.
03DESIGN
Design the book
Typography, chapter structure, metadata, cover and book architecture are prepared together.
04VERIFY
Understand quality
File checks, content checks, accessibility and concrete correction paths instead of cryptic messages.
05PRINT
Prepare print
Page numbers, book block, format, spine width, cover PDF and print-related checks.
06PUBLISH
Handoff publication
Guided packages for KDP, Apple Books, Google Play and printers — without storing store passwords.
THE GUIDED PRODUCTION PATH
From the first thought to the right edition.
Begin
Start writing, paste text or import a DOCX file with full control.
Develop
Complete chapters, book details, genre, structure and design step by step.
Verify
Meet editorial and technical requirements with clear, actionable guidance.
Build
Create valid EPUB, print and destination packages from the same book state.
Publish
Handoff to stores or printers with control and document the publication state.
EPUBIO RELEASETWIN
Your book changes. ReleaseTwin knows which edition is affected.
If the cover, title, a chapter or print profile changes after export, ReleaseTwin marks outdated editions and approvals. You always know what is truly current and ready to publish.
Discover ReleaseTwinCover was replacedNew cover version detected
1Rebuild EPUB
2Update KDP package
3Recheck print cover
EPUBIO AUDIOPASS · IN PREPARATION
Your finished book. Turned into a carefully directed audiobook.
Choose a curated voice using real passages, define pronunciation and narration direction, and keep every approval under control. AudioTwin ties the audiobook to the exact manuscript state it was made from.
Coming soon · final quality approval pendingNo purchase or full production will open until our final reference run confirms the defined audio quality.VOICEPROOF
Real voice samples from your own manuscript
DIRECTION
Pronunciation dictionary and clear narration guidance
AUDIOTWIN
Detect outdated audio chapters after text changes
AUDIO PACKAGE
Chapter files, complete edition and a clearly documented book state
THE EPUBIO DIFFERENCE
Not just an export. Responsibility across the full process.
Typical single-purpose tool
Write or import
EPUB and print from one book state
Reason + next step for blockers
Impact of later changes
Download all required files together
Guided store and print handoff
KNOWLEDGE THAT LEADS TO ACTION
Never wonder what the next step means.
Practical starting points for the real questions between a Word manuscript and publication.
01Convert DOCX to EPUB
Detect chapters and import a checked result instead of blindly converting.
02Create EPUBMove from manuscript to a technically validated ebook file.
03Validate EPUBUnderstand findings, causes and the action required.
04Prepare print filesTreat interior, spine width and cover as one edition.
05Free toolsEstimate spine width and simulate the effects of changes.
06epubio KnowledgeExplore methods, standards and concrete production questions.
ONE MODEL. ONE CLEAR PRICE.
BookPass instead of subscription clutter.
One BookPass guides a book project through writing, production and publication. No automatic renewal and no share of your book sales.
12months of full access60days of subsequent read-only access0No automatic renewal
epubio BookPassDesigned for one complete book project
€119one-time, VAT included
Included in BookPassComplete author workspaceEPUB, print and destination outputsReleaseTwin and version controlQuality checks with concrete solutionsGuided publication preparation
Choose BookPassFAQ
Questions worth answering before chapter one.
01Can I import my existing Word manuscript?
Yes. DOCX files are analysed first. epubio shows detected chapters, headings and notable passages before content is imported.
02Does epubio create a technically checked EPUB?
Yes. epubio checks every EPUB with the recognised EPUBCheck validator. If something is missing, you see the cause and next step in clear language.
03Can I prepare a print edition as well?
Yes. The production path covers book block, page numbers, format, spine width, cover PDF and print-related checks.
04Does epubio publish automatically on Amazon or Apple?
No. epubio creates and validates destination packages and guides the handoff. You confirm the binding publication in the respective portal.
05What makes ReleaseTwin different?
Change your cover, for example, and ReleaseTwin automatically shows which ebook or print files need to be rebuilt or checked again.
06Is epubio a subscription?
No. BookPass is a one-time, project-based payment without automatic renewal or sales commission.
07Can epubio prepare my audiobook too?
The epubio Audiobook Studio is in its final quality phase. It is designed around curated voices, real samples from the manuscript, pronunciation and narration direction, and a traceable audiobook package. Purchase will only open after our reference run meets every quality requirement.
YOUR BOOK DESERVES A CLEAN PATH
An idea begins quietly. Its publication should feel assured.
Write, produce and hand off your book in a system that understands the connections.
Start a book project