EPUB Readiness Checker
Run a weighted preflight before upload to catch missing metadata, broken navigation, and production gaps. The report separates blockers, important fixes, and optional polish.
Metadata still needed: book title, author name.
Metadata
Book structure
Navigation
Images
Typography and CSS
Accessibility
Validation and testing
An EPUB must work across reading systems
A reliable EPUB must reflow across different screens, font sizes, themes, and reading applications. Visual inspection on one device is therefore necessary but insufficient. Navigation, semantic headings, image descriptions, metadata, language, and validation all affect whether readers can use the book comfortably.
Resolve blockers before decorative polish. Missing title or author metadata, broken table-of-contents links, absent chapters, invalid markup, and unreadable images can prevent delivery or damage the reading experience. Decorative dividers and typographic refinements belong later in the production pass.
NovelOS Studio can export the finished project to EPUB alongside DOCX, PDF, HTML, Markdown, RTF, and plain text. The checker prepares the editorial and production decisions; NovelOS turns the connected manuscript into the files you need.
How to use this tool
- Enter basic book metadata and choose the publishing context.
- Mark completed checks across content, navigation, images, accessibility, and validation.
- Review the weighted score and resolve publishing blockers first.
- Download the report for your formatter, editor, or final production pass.
What the workspace includes
- Prioritizes blockers above cosmetic improvements
- Covers metadata, structure, accessibility, and retailer checks
- Creates a printable production report
- Keeps unpublished book information in the browser
From worksheet to working novel
Keep the plan. Build the whole book.
Bring this work into Manuscript formatting and export in NovelOS Studio, where your characters, world, scenes, timeline, goals, manuscript, and publishing exports stay connected in one private project.
- One-time purchase
- Windows and macOS
- Local-first privacy
Character Creation
The Oracle
Use AI to instantly brainstorm names, backstories, and personality traits for new characters whenever you are stuck.
AI Portraits
Generate visual references for your cast inside the app so every character stays recognizable across the whole book.
Genealogy Editor
Map bloodlines, rivalries, and family connections on a drag-and-drop board built for complex character webs.
Worldbuilding
The Architect
Generate the foundations for magic systems, religions, and political factions when you need a strong starting point.
Cartography Editor
Auto-generate regional and topographic maps that give your fictional world a real sense of scale.
Lore Mechanics
Define hard rules for your setting so your history, technology, and magic stay consistent from draft to draft.
Focus Editor (Manuscript)
Zen Mode
Hide every sidebar, menu, and visual distraction so it is just you and the page.
Vanishing Mode
Disable backtracking and force forward momentum when you need to finish the first draft without self-editing.
Smart Mentions
Type @ to reference characters, places, and lore without leaving the manuscript flow.
The Blueprint
Plots Canvas
Map story arcs visually, connect major beats, and spot structural gaps before they reach the manuscript.
Scene Cards
Plan each chapter with detailed scene blocks so the prose has a stronger narrative foundation.
Timeline View
Track pacing across characters and locations with a timeline built for multi-threaded stories.
Ideas Bank (Spark)
Infinite Canvas
Dump notes, connect fragments, and cluster ideas on a giant digital board that feels freeform instead of rigid.
Multimedia Notes
Drop text, images, links, audio, and video onto the same board to keep all research in one place.
Mini-Browser
Research references inside the app without disappearing into a maze of external tabs.
Goals Tracking
Daily Targets
See exactly how many words you need today to reach your deadline with less guesswork.
Heatmap Grid
Use a visual consistency tracker to protect your streak and keep the writing habit alive.
Pulse Analytics
Monitor momentum, output, and prose sharpness in real time so your progress stays measurable.
Writing Presets
Start with proven word-count goals like NaNoWriMo or Epic Novel targets in one click.
