Guide to Extracting Plain Text from EPUB: Chapter Ordering and Format Residue Handling
This article explains how EPUB structure affects extraction order and describes format processing rules, to help you output plain text content that meets the requirements for full-text search and text-to-speech reading.
Diperbarui 2026-08-11
EPUB Structure and Differences in Extraction Order
An EPUB ebook is essentially a ZIP format compressed archive. Its core content includes an OPF file in XML format, and the spine node of the OPF file explicitly defines the reading order of all chapters.
Most free tools extract text sorted by the filename of decompressed chapters, which disrupts the chapter order of the original book. This approach is only suitable for single-chapter EPUB files, and will result in disordered content for multi-chapter books.
| Extraction method | Order accuracy | Applicable scenarios |
|---|---|---|
| Extract by OPF spine order | Matches the original book's reading order | All standard EPUB ebooks |
| Extract sorted by filename | Order is easily disordered | Self-made single-chapter EPUB |
HTML Tag Removal and Paragraph Line Break Rules
Chapter content in EPUB is stored in XHTML format. Extracting plain text requires removing all HTML tags and retaining the actual body text content wrapped by the tags.
The conversion rules retain paragraph line breaks corresponding to the <p> tag in the original file, using one blank line to separate different paragraphs; convert <br> tags to a single line break, to adapt to the layout requirements of different reading scenarios.
- Retains paragraph line breaks, suitable for Markdown import and note organization
- Removes functional tags such as style and script to prevent irrelevant content from mixing into the output text
Inclusion Logic for Table of Contents and Annotations
The built-in navigation directory of EPUB will generate corresponding table of contents text. Most users do not need this content when extracting the main body, so the conversion tool removes the table of contents page by default and retains the main body text.
There are two processing modes for footnotes and in-chapter annotations: when extracting full text, all annotation content is retained and placed at the end of the corresponding chapter; when extracting only the main body text, all annotations can be removed. Users can select the corresponding option according to their own needs.
Output Encoding and Compatibility with Text-to-Speech Software
Text-to-speech scenarios require text to be free of redundant format interference. The output format with paragraph separation conforms to the sentence-breaking logic of most text-to-speech software, and can reduce the probability of incorrect sentence breaking.
Note on Inevitable Loss of Images and Formatting Information
Plain text extraction only retains text content. Binary resources such as illustrations and cover images in EPUB are completely removed, which is an inevitable result of plain text output.
Original book formatting information, including font size, page margins, bold and italic styles, column settings, etc., cannot be retained in plain text. The final output only retains text content and paragraph separation structure.
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Can the extracted plain text be imported directly into Obsidian for note-taking?
Yes. The output plain text uses UTF-8 encoding and separates paragraphs with blank lines, and can be imported directly into Obsidian. The paragraph format conforms to Markdown layout specifications.
Can this tool extract text from DRM-encrypted EPUB?
No. DRM-encrypted EPUB must first be decrypted with a compliant tool to obtain an unencrypted file, before you can use the EPUB to TXT converter to extract plain text.
What is the pricing for extracting plain text?
The pricing rules for the EPUB to TXT converter are subject to the current public notice on the official website. Basic use can process eligible files for free.