Changelog

Dark Mode

• Full dark mode support across the entire site — switch between Light, Dark, and System themes via the header toggle
• Automatically follows your system preference when set to System mode
• Optimized color palette for all pages: pricing, credits, settings, referral, and more
• Carefully tuned contrast ratios for text, cards, tables, and badges in dark mode

EPUB Footnote Upgrade

• Replaced traditional endnote-style footnotes with EPUB 3 popup footnotes
• Footnotes now appear as inline popups on supported readers (Apple Books, Kobo, etc.) instead of jumping to the end of the chapter
• Cleaner reading flow — no more back-and-forth navigation for footnote references

EPUB Generation

• Optimized EPUB build logic for improved reliability and edge case handling

Free Tools Suite

• Launched a complete free tools project with 6 browser-based PDF/EPUB tools
• PDF to EPUB: Client-side conversion using pdf.js and JSZip — no server upload needed
• PDF Operations: Merge, split, extract pages, and rotate PDFs entirely in-browser
• PDF to Image: Export PDF pages as high-quality images
• PDF to Markdown: Convert PDF content to Markdown format
• PDF & EPUB Reader: Read and preview documents with multi-language support
• EPUB Metadata Editor: Edit EPUB title, author, and other metadata fields
• PDF page preview lightbox with keyboard navigation
• Related tools recommendations at the bottom of each tool page
• Free tools link added to landing page footer

Login & Registration

• Enhanced password policy validation with strength requirements
• Implied terms of service notice on login and registration pages

Table of Contents Enhancements

• Responsive TOC variants for desktop and mobile layouts

Comparative Blog Posts

• Added 8 in-depth blog posts (English & Chinese) comparing PDF-to-EPUB methods
• Competitor comparisons: pdf2epub vs Adobe Acrobat, ABBYY FineReader, and Word method
• "Five Methods Compared" overview article for SEO content coverage
• Updated landing page translations to link new blog content

Improved PDF Page Counting

• Replaced regex-based PDF page counting with pdfjs-dist library
• More accurate page detection for reliable credit estimation
• Handles edge cases in complex PDF structures

Telegram Support

• Added Telegram as a contact and support channel
• Updated contact information across all internationalization files
• Available on help, landing, pricing, and task pages

Homepage UI Improvements

• Collapsible tips section — returning users see a compact view by default
• Advanced settings grouped under expandable panel for cleaner interface
• Refined mode selection styles with color-coded cards
• Sticky summary bar showing file count, pages, and estimated credits

Mobile Responsiveness

• Improved StatCard and referral section layout on mobile devices
• Adjusted footer responsiveness with scrollable mobile menu
• Removed sticky CTA bar from HomePage for cleaner mobile experience
• Better container padding and spacing across breakpoints

SEO & Site Improvements

• Added About and Changelog pages to sitemap for all supported locales
• Updated project timeline years in About page translations

Bug Fixes & Improvements

• Migrated KaTeX stylesheet to local import, removing external CDN dependency
• Removed unused mode label from blog post page
• Reorganized project documentation into a dedicated docs directory

User Dashboard

• New personal dashboard with real-time usage statistics from backend
• View conversion history, credit usage, and task status at a glance
• Full multi-language support across 7 languages

Onboarding Guide

• Added onboarding modal for first-time users on the dashboard
• Step-by-step walkthrough with localized content
• Helps new users quickly understand core features

Pre-Upload Credit Estimation

• Smart credit estimation before file upload with server-side accuracy
• Updated estimation logic to 3,000 tokens per page for more precise calculations
• Synchronized pricing display across all locales and UI components (~200 credits per 100 pages)

Cookie Consent & Privacy

• Implemented cookie consent banner with configurable tracking preferences
• GA4 integration respects user consent choices
• Full GDPR-friendly privacy controls with multi-language support

About Page

• New About page with company and product information
• Multi-language support and navigation links
• Added to sitemap and prerender configuration

Error Pages

• Dedicated 404 Not Found page with localized content
• Global error boundary page for unexpected errors
• Clean, user-friendly error experience across all languages

Bug Fixes & Improvements

• Replaced anchor tags with LocalizedLink in TaskCard for consistent client-side routing

New Settings Center

• Added profile, security, notifications, account, and subscription settings sections
• Migrated referral page into unified settings layout
• Mobile-responsive optimization for settings panel

Help Page

• New help page with multi-language support (7 languages)
• Integrated contact form with backend API
• FAQ and common questions with full i18n

Changelog Page

• New changelog page powered by Markdown content
• Tag-based filtering and pagination
• Full i18n support across 7 languages

Navigation Redesign

• Switched navigation menu to hover-based dropdown
• Added Pricing, Settings, Blog, and Changelog navigation links
• Fully localized navigation labels

Landing Page Improvements

• Added newsletter subscription section
• Updated social links to Antistatic X and Medium profiles
• Streamlined contact API

Task Upgrade to Pro Mode

• Upgrade any existing task from standard to Pro mode
• UI button and API endpoint for seamless upgrading
• Full i18n support for upgrade workflow

Subscription Pricing Update

• Refreshed subscription pricing plans
• Updated pricing UI with internationalization
• Pricing and Blog navigation links added to header

AI Processing Improvements

• Introduced EmptyResponseError for handling empty AI responses
• Disabled Gemini/Vertex safety filters for better throughput
• Enhanced retry logic for OCR processing
• Improved error handling across AI providers

Bug Fixes

• Fixed resend_email_id column type from String(100) to Text
• Pro Workspace translation keys for all 7 languages

Image Cropping in Pro Workspace

• Interactive image crop and zoom controls on OCR pages
• Direct image URL for cropped images in frontend
• Image cropping integrated into the re-OCR process
• Delete image references from OCR text

TOC & Metadata Re-extraction

• Re-extract table of contents using LLM
• Re-extract book metadata (title, author, etc.) via dedicated API
• Toast notifications for extraction success/failure
• Front page image sampling for improved metadata accuracy

OCR Editor Upgrade

• Replaced OCR text editor with Vditor
• Image URL resolution in OCR editor
• Chinese conversion options in OCR stage

Improvements

• Pro Workspace access for all subscribed users
• Loading indicators during markdown generation and metadata extraction
• Pro mode task access control (backend + frontend)
• Auto-refresh stage data when tasks transition states
• Daily scheduled cleanup of old completed task files

Promotional Pricing

• Limited-time discount with countdown timer
• Discount code support for payments
• Dynamic price display on Landing and Pricing pages
• Package credit amounts shown on pricing cards

Enhanced Markdown Editor

• Replaced custom editor with Vditor rich Markdown editor
• Markdown outline panel for improved navigation
• Refresh and regenerate content actions
• Empty state handling with clear guidance

Inline EPUB Preview

• Live EPUB style preview in Pro Workspace
• Dynamic style adjustments during editing
• Integrated with backend EPUB generation

Improvements

• TOC reordering functionality in Pro Workspace
• R2 custom domain support for faster downloads
• Download buttons with loading state feedback
• Disabled Gemini model thinking to reduce cost and latency

Document Translation

• Translate documents to any supported language during conversion
• Translation credit estimation and billing
• Translation configuration UI on task creation
• Landing page showcase for translation feature

Chinese Text Conversion

• Automatic Simplified ↔ Traditional Chinese conversion
• Configurable during EPUB generation
• Backend atom for Chinese text processing

Responsive Design

• Fully responsive homepage and file uploader
• Optimized mobile experience across all pages
• Compact "Add more files" option for batch uploads

Improvements

• Online EPUB preview feature on landing page
• Advanced conversion parameters in task settings
• Book metadata management (publisher, ISBN, description, custom fields)
• Pro Workspace stage advancement with error handling

Pro Workspace (Beta)

• 4-stage editing workflow: OCR → TOC → Markdown → EPUB
• Edit and refine results at each processing stage
• PDF.js-based page rendering for OCR review
• Markdown preview mode with authenticated image loading
• "Studio" badge for Pro mode tasks

Security & Anti-Abuse

• Device fingerprinting for registration tracking
• IP-based rate limiting for account creation
• Redis distributed locks for concurrent task prevention
• Enhanced login record tracking with fingerprint data

Account Management

• Account deletion with 7-day grace period
• Active subscription check before deletion
• Support email system with reply functionality
• Admin support email management with inbound webhook

Improvements

• Admin task management module
• Admin reconciliation with per-task and per-user statistics
• User channel source tracking (UTM + referrer)
• Terms of service agreement on authentication pages