liminfoEPUB Convert
Free web tool: EPUB Convert
EPUB 파일을 여기에 드래그하거나
Choose fileEPUB 파일 (최대 50MB)
About EPUB Convert
The EPUB Converter is a free, browser-based tool that parses EPUB ebook files and extracts their content into readable HTML or plain text. EPUB is a ZIP-based open standard format used by most ebook readers and digital publishing platforms. This tool reads the EPUB container structure — starting from META-INF/container.xml, locating the OPF package document, parsing the spine element for reading order, and extracting each chapter from the manifest — entirely within your browser using the JSZip library.
Writers, editors, developers, and researchers commonly use this tool to inspect ebook content without needing dedicated software like Calibre or Adobe Digital Editions. It is particularly useful for extracting text from EPUB files for translation, accessibility processing, content migration, or archival. The chapter-by-chapter navigation lets you jump directly to any section of the book, and the dual view mode lets you preview both formatted HTML and stripped plain text side by side.
All processing happens client-side in your browser — your EPUB file is never uploaded to any server. The tool supports EPUB 2 and EPUB 3 formats, handles URL-encoded filenames, and falls back gracefully when the OPF spine is missing by scanning for all XHTML files in the archive. Exported HTML includes a clean, readable stylesheet, and text exports use simple separator formatting for easy processing in other tools.
Key Features
- Parses EPUB container.xml and OPF package to follow the official spine reading order
- Extracts chapter titles from h1/h2/h3 headings within each XHTML document
- Dual view mode: toggle between formatted HTML rendering and plain text
- Interactive chapter navigator — click any chapter in the table of contents to jump to it
- Export entire book as a single HTML file with embedded styles, or as plain text with separators
- Handles EPUB 2 and EPUB 3 formats, plus URL-encoded filenames in ZIP archives
- Supports files up to 50 MB — no upload required, processing is 100% local
- Dark mode support and responsive layout for comfortable use on any device
Frequently Asked Questions
What is an EPUB file?
EPUB (Electronic Publication) is an open standard ebook format maintained by the W3C. It is essentially a ZIP archive containing XHTML content files, CSS stylesheets, images, and a metadata package (OPF file). Most ebook readers, including Kindle (via conversion), Kobo, Apple Books, and Google Play Books, support EPUB.
How does this EPUB converter work technically?
The tool uses JSZip to extract the ZIP archive in your browser, reads META-INF/container.xml to find the OPF package file, parses the spine element to get the reading order of chapters, resolves each chapter path from the manifest, and extracts the body content of each XHTML file. Text is extracted by creating a temporary DOM element and reading its textContent.
What is the difference between the HTML and text export?
The HTML export creates a complete, self-contained HTML document with all chapters concatenated and separated by horizontal rules, preserving formatting like headings and bold text. The text export strips all HTML tags and produces clean plain text with chapter titles formatted as === Chapter Title === headings and --- separators between sections.
Why does the tool show fewer chapters than expected?
Some EPUB files have chapters split across many small XHTML files, while others combine multiple chapters into a single file. The tool splits content by XHTML file, following the spine order. If chapters appear merged, the EPUB author likely combined them in one file. The tool also skips files whose extracted text content is empty.
Does this tool support DRM-protected EPUB files?
No. DRM (Digital Rights Management) protected EPUB files are encrypted and cannot be parsed by browser-based tools or any software without the appropriate decryption key provided by the DRM system. This tool only works with DRM-free EPUB files.
Can I convert EPUB to PDF with this tool?
This tool converts EPUB to HTML or plain text. For PDF conversion, you can export the HTML version from this tool and then print it to PDF using your browser's built-in print function (Ctrl+P or Cmd+P), selecting "Save as PDF" as the destination.
What is the maximum EPUB file size supported?
The tool supports EPUB files up to 50 MB. Since processing happens entirely in your browser, very large files may take longer to parse depending on your device's memory and processing speed. Most EPUB ebooks are well under 10 MB unless they contain many high-resolution images.
Is my EPUB file uploaded to any server?
No. Your EPUB file is processed entirely within your web browser using the JavaScript File API and JSZip. The file data never leaves your device. There are no server requests made during the conversion process, making this tool completely private and secure.