Sigil
The EPUB Ebook Editor.
Overview
Sigil is a free, open-source, multi-platform EPUB ebook editor. It is designed to help users create and edit EPUB files with full control over the underlying code. It features a WYSIWYG (What You See Is What You Get) editor, a code view for direct HTML and CSS editing, and a range of tools to ensure the final EPUB is well-formed and compliant with standards. It is favored by authors and formatters who want to clean up or create complex EPUB files.
✨ Key Features
- WYSIWYG and Code View editing
- Table of Contents generator
- Metadata editor
- Spell check with default and user-configurable dictionaries
- Full regular expression (grep) support for find and replace
- Plugin support for extended functionality
- EPUB validation tools (integration with FlightCrew)
- Direct editing of EPUB syntax
🎯 Key Differentiators
- Dedicated focus on being the best EPUB editor
- Robust WYSIWYG and code view modes
- Strong adherence to EPUB standards
Unique Value: Sigil provides a powerful, free, and open-source tool for creating and editing standard-compliant EPUB files with complete control over the final product.
🎯 Use Cases (5)
✅ Best For
- E-book formatters using the code view to precisely control the styling of a book
- Authors cleaning up the messy code generated by word processors
- Technically-minded users building an EPUB from the ground up
💡 Check With Vendor
Verify these considerations match your specific requirements:
- Users who are not comfortable with HTML or CSS
- Creating print books or PDFs
- Simple, one-click e-book creation
🏆 Alternatives
While Calibre has an editor, Sigil is a more focused and often preferred tool for dedicated EPUB editing. Unlike high-level formatting tools, Sigil gives the user direct access to the code, allowing for maximum flexibility.
💻 Platforms
✅ Offline Mode Available
🔌 Integrations
🔒 Compliance & Security
💰 Pricing
Free tier: The software is completely free and open source.
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