The Book Browser groups an EPUB’s contents into folders, making its text files, styles, images, and other resources easier to locate. Sigil is a free EPUB editor: you edit the book’s code and see the result in a live preview.
How does the live preview fit into editing?
Edit the book’s HTML and CSS in the code view while the Preview panel shows how each page looks as you type.
The editor covers the content and presentation details that commonly need attention during an EPUB revision. You can revise prose, adjust styles and fonts, replace images, and change metadata such as the book’s identifying information.
EPUB contents and metadata
Use the Book Browser to navigate the parts of a book by resource type. Its folder-based layout keeps text documents, style sheets, and image files distinct, so you can open a particular component without searching through one long document. This is especially helpful when an EPUB contains multiple sections or supporting assets.
Sigil can also restructure page content and update the publication’s metadata.
Code tools, table of contents, and plugins
For books that need a navigable contents list, Sigil includes tools to create a table of contents from the publication’s structure. This lets you work on navigation as part of editing the EPUB, alongside its text and presentation.
The toolbar offers many icons and shortcuts, so the interface can look busy at first. Hover descriptions explain individual controls, and F1 opens the program’s documentation, guides, and tutorials. Plugins available for Sigil can add capabilities to its editing workflow.
- Watch the Preview panel while changing markup in the code view.
- Navigate EPUB resources through the Book Browser’s folders.
- Extend the built-in workflow with compatible plugins.
Pros
- Live preview reflects code edits as you work
- Book Browser organizes EPUB resources into folders
- Edit text, images, styles, fonts, and metadata
- Plugins can extend Sigil’s editing tools
Cons
- The interface displays many icons and shortcuts
System requirements: Windows 10, Windows 11 · 64-bit only
What file format does Sigil edit?
Sigil creates, edits, and packages eBooks in EPUB format.
Can I see how the book looks while I edit?
Yes. The Preview panel updates as you change the HTML and CSS in the code view.
How do I find images and style sheets in a book?
Use the Book Browser, which groups EPUB resources such as images and styles into folders.
