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General Questions

Universal Novel Scraper (UNS) is a desktop application that scrapes web novels from various websites and converts them into professionally formatted EPUB books. It uses Electron’s built-in Chromium browser to scrape pages like a real user, bypassing most bot protections.
UNS runs on:
  • Windows 10 and later
  • macOS 10.13 (High Sierra) and later (both Intel and Apple Silicon)
  • Linux distributions with GTK 3 support
Yes, UNS is free for personal use under the Creative Commons Attribution-NonCommercial 4.0 license. However, commercial use is prohibited without explicit permission.
No. The packaged releases include everything needed to run the app. Python and Node.js are only required if you’re building from source code.

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Usage Questions

UNS uses a provider system. To add a new site:
  1. Go to the Marketplace tab
  2. Browse community providers
  3. Click Install on the provider for your target site
If no provider exists, you can create one:
  • Providers are JavaScript files that define scraping logic
  • See the Provider Development Guide for details
  • Share your provider with the community!
Yes! You can:
  • Click Stop during scraping to pause
  • Find paused downloads in the History tab
  • Click Resume to continue from where you left off
Progress is automatically saved after each chapter.
Enable Cloudflare Bypass Mode in the download settings:
  1. Check “Enable Cloudflare Bypass”
  2. When a challenge appears, the browser window will show automatically
  3. Solve the challenge manually (captcha, checkbox, etc.)
  4. Scraping will continue automatically once solved
Tips:
  • Use longer delays between chapters (2-5 seconds)
  • Keep the browser window focused when solving challenges
  • Some sites only require solving once per session
EPUB files are stored in the app’s userData directory:
  • Windows: %APPDATA%\universal-novel-scraper\output\epubs\
  • macOS: ~/Library/Application Support/universal-novel-scraper/output/epubs/
  • Linux: ~/.config/universal-novel-scraper/output/epubs/
You can also:
  • Open the folder from Library > Open Output Folder
  • Export individual books using the Download button in Library
Currently, UNS sets metadata during scraping. To change metadata:
  1. Use EPUB editors like Calibre
  2. Or edit before finalizing:
    • Provide correct title/author in the download form
    • Upload a custom cover image
Click the + button in the Library tab and select your EPUB files. They’ll be copied to the library and covers will be automatically extracted.

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Technical Questions

Modern websites use JavaScript rendering, Cloudflare protection, and bot detection. Using a real browser:
  • Executes JavaScript like a human visitor
  • Maintains cookies and sessions
  • Passes bot detection checks
  • Handles dynamic content loading
This makes UNS much more reliable than traditional scrapers.
The Python FastAPI “engine” handles:
  • Storing scraped chapters (JSONL format)
  • Tracking download progress
  • Generating EPUB files with ebooklib
  • Managing the library
  • Serving cover images
It runs locally and communicates with Electron via REST API.
UNS uses several techniques:
  • Random delays between requests
  • Real browser user agent
  • Human-like browsing patterns
  • Session cookie management
  • Optional manual challenge solving
However, respect rate limits and use reasonable delays to avoid overloading servers.
Currently, UNS supports one active scrape at a time. This is intentional to:
  • Reduce server load on target sites
  • Maintain stable browser sessions
  • Avoid detection as a bot
You can queue multiple downloads by starting one after another finishes.
The scraper looks for:
  • Title: Usually an <h1>, <h2>, or element with class like .chapter-title
  • Content: Paragraphs in <p> tags within a content container
  • Next button: A link containing “next” that points to the next chapter
Provider scripts can customize this logic for specific sites.
UNS uses the ebooklib library to:
  1. Read the EPUB file
  2. Find items with image/* media type
  3. Return the first image found
This works because UNS only embeds one image (the cover) during creation.

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Troubleshooting Questions

Common causes:
  1. Pagination detection failed - The “next chapter” button wasn’t found
  2. Site structure changed - Provider script needs updating
  3. Cloudflare block - Enable Cloudflare Bypass mode
  4. Rate limiting - Increase delays between chapters
Try enabling “Show Browser Window” to see what’s happening.
See the Troubleshooting Guide for platform-specific solutions. Common fixes:
  • macOS: chmod +x the engine binary
  • Windows: Run as Administrator or check Windows Defender
  • Linux: Install missing GTK3 dependencies
Check:
  1. Internet connection
  2. Provider repository URL is accessible
  3. Provider file is valid JavaScript
  4. Disk permissions for userData directory
See Provider Installation for details.
No. UNS is completely offline except when:
  • You scrape websites (direct connection to target site)
  • You install providers (downloads JS files from provider repository)
No usage data, analytics, or telemetry is collected.
No. UNS is licensed under CC BY-NC 4.0, which prohibits commercial use. For commercial licensing, contact the developer via GitHub.

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Contributing

Contributions are welcome!
  • Code: Submit pull requests on GitHub
  • Providers: Create and share provider scripts
  • Documentation: Improve guides and tutorials
  • Bug reports: Open detailed issues on GitHub
  • Feature requests: Discuss ideas in GitHub Discussions
Open an issue on GitHub Issues with:
  1. Operating system and version
  2. UNS version number
  3. Steps to reproduce
  4. Expected vs actual behavior
  5. Relevant logs and screenshots
See Troubleshooting > Getting Help for details.

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Still Have Questions?

If your question isn’t answered here:
  1. Check the Troubleshooting Guide
  2. Browse the full documentation
  3. Search GitHub Issues
  4. Open a new issue with your question