# All-in-One EPUB Tools Website – Complete Project Prompt

## Project Overview
Create a modern, user-friendly web application that provides comprehensive EPUB (electronic publication) manipulation and conversion tools. The website should be fast, secure, process files client-side when possible, and offer a professional user experience for authors, publishers, and readers.

## Core Features Required

### 1. **EPUB Conversion Tools**
– EPUB to PDF
– EPUB to MOBI (Kindle format)
– EPUB to AZW3 (Kindle format)
– EPUB to TXT (plain text)
– EPUB to DOCX (Word)
– EPUB to HTML
– PDF to EPUB
– MOBI to EPUB
– AZW3 to EPUB
– Word to EPUB
– HTML to EPUB
– TXT to EPUB
– Markdown to EPUB
– EPUB 2 to EPUB 3 conversion

### 2. **EPUB Editing Tools**
– Edit metadata (title, author, publisher, ISBN, language)
– Edit table of contents (TOC)
– Add/remove/reorder chapters
– Edit cover image
– Change/update fonts
– Adjust text formatting
– Add/edit copyright page
– Insert/edit images
– Fix broken internal links
– Add footnotes and endnotes
– Edit CSS stylesheets
– Customize chapter headings

### 3. **EPUB Creation Tools**
– Create EPUB from scratch
– Multi-chapter book builder
– Template-based creation
– Import from Word documents
– Import from Google Docs
– Blog/website to EPUB converter
– RSS feed to EPUB
– Wikipedia article to EPUB
– Compile multiple documents into one EPUB

### 4. **EPUB Validation & Quality**
– Validate EPUB files (EPUB Check)
– Fix common EPUB errors
– Check accessibility compliance
– Validate against EPUB 2/3 standards
– Check for broken links
– Verify image references
– Font embedding validation
– CSS validation
– Spine order verification
– Metadata completeness check

### 5. **EPUB Reading & Preview**
– Online EPUB reader with adjustable settings
– Preview before downloading
– Bookmarking capability
– Night mode/day mode
– Font size adjustment
– Font family selection
– Background color options
– Reading progress indicator
– Search within EPUB
– Annotation tools (private, local storage)

### 6. **EPUB Optimization Tools**
– Compress EPUB file size
– Optimize images within EPUB
– Remove unused CSS
– Clean up code
– Minify HTML/CSS
– Remove DRM (if legally owned)
– Strip metadata for privacy
– Batch optimization

### 7. **Advanced EPUB Tools**
– Split EPUB into multiple files
– Merge multiple EPUBs
– Extract images from EPUB
– Extract text content
– Extract metadata
– Add watermarks
– Translate EPUB (integration with translation APIs)
– Convert fixed-layout to reflowable
– Text-to-speech preview
– Generate EPUB from audiobook metadata

### 8. **Publishing & Distribution Tools**
– EPUB to multiple formats (one-click multi-export)
– Format for specific platforms (Amazon, Apple Books, Google Play, Kobo)
– Generate ISBN barcode
– Create book description/blurb
– Generate marketing materials
– Export metadata for distribution
– Kindle previewer integration
– Sample chapter extractor

## Technical Requirements

### Frontend
– **Framework**: React or Next.js for optimal performance
– **Styling**: Modern, responsive design with Tailwind CSS
– **EPUB Library**: JSZip, epub.js for reading/parsing
– **Editor**: Monaco Editor or CodeMirror for code editing
– **File Handling**: Drag-and-drop interface with progress indicators
– **Responsive**: Mobile-friendly, tablet optimized, desktop enhanced

### Processing
– **Client-side processing**: For privacy-sensitive operations
– **Server-side processing**: For heavy conversions (PDF, MOBI)
– **Hybrid approach**: Balance between privacy and performance
– **WebAssembly**: For performance-intensive operations
– **Worker threads**: For non-blocking UI during processing
– **Streaming**: For large file handling

### Performance
– Handle EPUB files up to 500MB
– Preview generation under 3 seconds
– Conversion completion within 30 seconds
– Support batch processing (up to 10 files)
– Optimize for memory usage
– Progressive loading for large files

### Security & Privacy
– Secure file handling
– Option for client-side only processing
– Clear privacy policy
– HTTPS encryption
– No content reading or storage (state clearly)
– DRM respect and legal compliance
– User data protection (GDPR compliant)

## User Interface Design

### Layout
– **Header**: Logo, navigation (Tools, Features, Blog, Pricing), search
– **Hero Section**: Value proposition, primary CTA, feature highlights
– **Tools Dashboard**: Categorized tool cards with icons
– **Quick Actions**: Most popular tools prominently displayed
– **Footer**: Resources, legal links, social media, contact

### User Flow
1. User selects tool from homepage or search
2. Upload EPUB file(s) via drag-drop or file picker
3. Preview EPUB (optional) in built-in reader
4. Configure options/settings for the tool
5. Process with real-time progress feedback
6. Preview/validate results
7. Download processed file(s)
8. Option to perform additional operations

### Design Elements
– Clean, book-themed interface
– Intuitive categorization (Convert, Edit, Create, Optimize)
– Visual book/shelf metaphors
– Smooth animations and transitions
– Progress indicators with estimated time
– Toast notifications for success/errors
– Comparison view (before/after)
– Dark mode for reading comfort
– Accessibility features (screen reader support, keyboard navigation)

## Additional Features

### User Experience
– **Workspace**: Save projects for later editing
– **History**: Track recent conversions (local storage)
– **Favorites**: Bookmark frequently used tools
– **Presets**: Save custom settings for tools
– **Tutorials**: Video guides and documentation
– **Templates**: Pre-made EPUB templates for different genres
– **Keyboard Shortcuts**: For advanced users
– **Bulk Operations**: Process multiple files simultaneously

### Community Features
– **Template Library**: User-submitted EPUB templates
– **Style Marketplace**: CSS themes for EPUBs
– **Forums**: Discussion boards for authors/publishers
– **Tips & Tricks**: Blog with EPUB best practices
– **Showcase**: Featured books created with the tool
– **User Reviews**: Ratings and feedback system

### Integration & API
– **Cloud Storage**: Dropbox, Google Drive, OneDrive integration
– **CMS Integration**: WordPress, Medium plugins
– **Email**: Send EPUB directly to Kindle email
– **Social Sharing**: Share previews on social media
– **API Access**: For developers and publishers
– **Webhook Support**: For automated workflows
– **Third-party Tools**: Grammarly, ProWritingAid integration

### Monetization Strategy
– **Free Tier**:
– Basic conversions (5 per day)
– File size limit (50MB)
– Watermarked output (optional)
– Standard templates
– Ads (non-intrusive)

– **Premium Tier** ($9.99/month or $79/year):
– Unlimited conversions
– No file size limits
– No watermarks
– Advanced editing features
– Priority processing
– Premium templates
– API access
– Batch processing
– No ads

– **Professional Tier** ($29.99/month):
– Everything in Premium
– Team collaboration features
– White-label options
– Custom branding
– Advanced API limits
– Priority support
– Custom templates

– **Enterprise**: Custom pricing
– Dedicated infrastructure
– Custom integrations
– SLA guarantees
– Dedicated support

## Technical Stack Suggestions

### Core Libraries
– **EPUB Parsing**: epub.js, epub-gen
– **File Handling**: JSZip, FileSaver.js
– **Text Processing**: Pandoc (via WebAssembly or server)
– **Image Processing**: Sharp, Jimp
– **PDF Generation**: jsPDF, PDFKit
– **Validation**: EPUBCheck (server-side)
– **Markdown**: marked, remark
– **XML/HTML**: cheerio, jsdom

### Frontend Stack
– **Framework**: Next.js 14+ (App Router)
– **UI Components**: shadcn/ui, Radix UI
– **State Management**: Zustand, Redux Toolkit
– **Forms**: React Hook Form, Zod validation
– **Editor**: TipTap, Quill, or ProseMirror
– **Reader**: epub.js with custom UI
– **Styling**: Tailwind CSS, CSS Modules
– **Icons**: Lucide React, Heroicons

### Backend Stack
– **Runtime**: Node.js 20+
– **Framework**: Express, Fastify, or tRPC
– **Database**: PostgreSQL (user data), Redis (cache)
– **File Storage**: AWS S3, Cloudinary
– **Queue System**: Bull, BullMQ for async jobs
– **Authentication**: NextAuth.js, Clerk, or Auth0
– **Payment**: Stripe, Paddle
– **Email**: SendGrid, Resend

### Infrastructure
– **Hosting**: Vercel (frontend), Railway/Fly.io (backend)
– **CDN**: Cloudflare, AWS CloudFront
– **File Processing**: AWS Lambda, Google Cloud Functions
– **Monitoring**: Sentry, LogRocket
– **Analytics**: Plausible, PostHog
– **Search**: Algolia, Meilisearch

### DevOps
– **Version Control**: Git, GitHub
– **CI/CD**: GitHub Actions, Vercel
– **Testing**: Jest, Playwright, Vitest
– **Linting**: ESLint, Prettier
– **Type Safety**: TypeScript
– **Documentation**: Docusaurus, Storybook

## SEO & Content Strategy

### Target Keywords
– Primary: “epub converter”, “create epub”, “edit epub”, “epub tools”
– Long-tail: “convert pdf to epub free”, “epub validator online”, “how to make epub ebook”
– Tool-specific: “epub to mobi converter”, “epub metadata editor”

### Content Plan
– **Tool Pages**: Dedicated pages for each tool with detailed descriptions
– **Blog**:
– “How to Create Your First EPUB Book”
– “EPUB vs MOBI vs PDF: Which Format is Best?”
– “10 Common EPUB Errors and How to Fix Them”
– “Self-Publishing Guide: From Word Doc to EPUB”
– **Resources**:
– EPUB specification documentation
– Template gallery
– Video tutorials
– Case studies
– **SEO Optimization**:
– Schema markup (SoftwareApplication, HowTo)
– Fast page speeds (Core Web Vitals)
– Mobile-first indexing
– Internal linking strategy
– Backlink building

## Compliance & Legal

### Copyright & DRM
– Clear terms: “Users must own rights to content”
– DRM removal only for legally owned books
– No piracy facilitation
– DMCA compliance
– Watermarking options for publishers

### Data Protection
– GDPR compliant (EU users)
– CCPA compliant (California users)
– Privacy policy detailing data handling
– Cookie consent management
– Data deletion requests
– Export user data option

### Legal Pages
– Terms of Service
– Privacy Policy
– Cookie Policy
– Acceptable Use Policy
– Refund Policy
– Affiliate Disclosure (if applicable)

### Accessibility
– WCAG 2.1 Level AA compliance
– Screen reader support
– Keyboard navigation
– Alt text for images
– Color contrast compliance
– Accessibility statement

## Launch Checklist

### Pre-Launch
– [ ] All core tools functional and tested
– [ ] User authentication system working
– [ ] Payment integration tested
– [ ] Email system operational
– [ ] Legal pages complete and reviewed
– [ ] Privacy/security audit completed
– [ ] Performance optimization (Lighthouse >90)
– [ ] Cross-browser testing completed
– [ ] Mobile responsiveness verified
– [ ] SEO fundamentals implemented

### Launch
– [ ] Soft launch to beta users
– [ ] Collect and implement feedback
– [ ] Monitor error rates and performance
– [ ] Public launch announcement
– [ ] Press release distribution
– [ ] Social media campaign
– [ ] Product Hunt launch
– [ ] Indie Hackers post

### Post-Launch
– [ ] Monitor analytics daily
– [ ] Respond to user feedback
– [ ] Fix critical bugs within 24h
– [ ] Content marketing (2 blog posts/week)
– [ ] Community engagement
– [ ] A/B testing key features
– [ ] Iterate based on data

## Success Metrics

### Technical KPIs
– Page load time < 2 seconds
– Conversion time < 30 seconds (average) – Uptime > 99.5%
– Error rate < 0.1%
– API response time < 500ms ### Business KPIs – Free to premium conversion > 3%
– Monthly active users (MAU) growth > 20%
– User retention (30-day) > 40%
– Customer lifetime value (LTV) > $100
– Net Promoter Score (NPS) > 50

### User Engagement
– Average tools used per session > 2
– Return user rate > 50%
– Average session duration > 8 minutes
– Tool completion rate > 85%
– User satisfaction score > 4.5/5

## Future Enhancements

### Phase 2 (3-6 months)
– Mobile apps (iOS/Android)
– Desktop application (Electron)
– Browser extension
– Advanced collaboration tools
– Version control for EPUBs
– AI-powered features (grammar check, style suggestions)

### Phase 3 (6-12 months)
– Multi-language support (Spanish, French, German, Chinese)
– Advanced publishing platform integration
– Audiobook features
– Interactive EPUB creation
– Marketplace for templates and themes
– White-label solution for publishers

### Phase 4 (12+ months)
– AI writing assistant
– Automated book formatting from raw text
– Distribution network integration
– Rights management system
– Royalty tracking
– Advanced analytics for publishers

## User Personas

### Persona 1: Independent Author
**Name**: Sarah, 35
**Goal**: Self-publish her first novel
**Needs**: Easy EPUB creation, formatting tools, multi-format export
**Pain Points**: Technical complexity, expensive software
**Use Case**: Convert Word manuscript to EPUB, customize formatting, validate for distribution

### Persona 2: Publisher
**Name**: Marcus, 42
**Goal**: Streamline ebook production workflow
**Needs**: Batch processing, quality control, team collaboration
**Pain Points**: Manual processes, inconsistent formatting
**Use Case**: Process 50+ manuscripts monthly, ensure quality standards, distribute to multiple platforms

### Persona 3: Reader/Collector
**Name**: Elena, 28
**Goal**: Organize and optimize personal ebook library
**Needs**: Conversion tools, metadata editing, file optimization
**Pain Points**: Incompatible formats, large file sizes
**Use Case**: Convert various formats to EPUB, edit metadata for organization, compress files

### Persona 4: Content Creator
**Name**: James, 31
**Goal**: Convert blog content to ebook format
**Needs**: HTML to EPUB, bulk conversion, styling
**Pain Points**: Formatting loss, broken images
**Use Case**: Compile 50 blog posts into themed ebooks, maintain formatting, add professional polish

## Competitive Analysis

### Key Competitors
– Calibre (desktop software – free)
– Online-Convert (multi-format tool)
– Zamzar (conversion service)
– EPUBator (EPUB editor)
– Reedsy Book Editor (book creation)

### Differentiation Strategy
– **vs Calibre**: Web-based, no installation, modern UI, mobile-friendly
– **vs Online-Convert**: EPUB-specialized, more editing features, better quality
– **vs Zamzar**: Faster, more formats, built-in reader/editor
– **vs EPUBator**: More comprehensive toolset, better UX, active development
– **vs Reedsy**: More technical control, conversion focus, broader tool range

### Unique Value Propositions
1. Most comprehensive EPUB toolset online
2. Client-side processing for privacy
3. Built-in reader with instant preview
4. One-click multi-format export
5. Template marketplace and community
6. Publisher-grade quality tools
7. Modern, intuitive interface

## Marketing Strategy

### Launch Strategy
1. **Content Marketing**: SEO-optimized blog posts and tutorials
2. **Product Hunt**: Feature launch with exclusive discount
3. **Social Media**: Twitter, Reddit (r/selfpublish, r/writing)
4. **Email Outreach**: Contact indie author communities
5. **Partnerships**: Collaborate with writing software providers
6. **Affiliate Program**: Partner with book bloggers and writing coaches

### Growth Strategy
1. **SEO**: Dominate long-tail keywords in EPUB space
2. **Content**: Weekly tutorials, monthly case studies
3. **Community**: Build active user forum and Discord
4. **Referral Program**: Incentivize user referrals
5. **Integrations**: Partner with popular writing tools
6. **Freemium Model**: Generous free tier to drive adoption

### Retention Strategy
1. **Onboarding**: Interactive tutorial for new users
2. **Email**: Tips, feature updates, use cases
3. **Product Updates**: Regular new features and improvements
4. **Community**: Engage users in feature development
5. **Support**: Responsive customer service
6. **Value**: Continuous improvement and optimization

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## Example User Stories

**As an indie author**, I want to convert my Word manuscript to EPUB format so I can self-publish on Amazon, Apple Books, and other platforms.

**As a publisher**, I want to batch process 100 manuscripts to EPUB format so I can streamline my production workflow.

**As a reader**, I want to convert my PDF ebooks to EPUB so I can read them on my e-reader with adjustable fonts.

**As a blogger**, I want to compile my best blog posts into an EPUB ebook so I can offer it as a lead magnet.

**As a translator**, I want to edit EPUB metadata and text so I can localize books for different markets.

**As a student**, I want to convert my research papers to EPUB so I can read them more comfortably on my tablet.

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This comprehensive prompt provides everything needed to build a professional EPUB tools website. Adjust priorities based on your target audience, technical resources, and business goals.