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Convert EPUB to HTML

Convert EPUB to HTML in seconds. Free, no signup, no watermark, no file-size limit. Your file is processed in your browser and never uploaded.

At a glance

Source
EPUB
Target
HTML
Where it runs
Your browser
Cost
Free, unlimited
Account
Not needed
EPUB

Converter

EPUB to HTML

On device

Drop one or more e-book files.

or select e-book

Your file never leaves this browser

    The details

    What happens when you convert between document formats

    The standard e-book format. Reflowable text that fits whatever screen you are reading on. The document is opened in a layout engine and re-saved in the target format, mapping each style onto the closest equivalent in the new format. The result is a the format the web is built on. a document that a browser knows how to lay out, produced entirely inside your browser.

    What survives

    • The text and the paragraph structure
    • Most formatting: fonts, sizes, colours, alignment, lists and tables
    • Embedded images

    What changes

    • Styles that have no equivalent are approximated
    • The file may gain or lose features the target format does not support

    Where it goes wrong

    • Styles are usually mapped by name, so renaming a style before converting can lose the mapping
    • The target format may not support the same page size or margins

    Why anyone would do this

    Different teams use different formats, and the content should not be held hostage by that.

    About the format

    The standard e-book format.

    A ZIP archive of XHTML documents, a stylesheet, images and a manifest that says which file is the cover and which is the table of contents.

    Where it is good
    • Reflows to any screen, so it is comfortable on a phone
    • Fonts can be resized by the reader without breaking the layout
    • Supports images, footnotes, tables and audio
    Where it falls short
    • No fixed layout, so a comic or a textbook loses its page design
    • Needs an e-reader or a reader app
    • DRM is common in commercial books and blocks conversion
    You will find it on
    Kobo, Apple Books, Kindle, Koodo, Calibre, libraries

    The thing people miss

    A DRM-protected EPUB cannot be opened by anything except the store that sold it — that is the whole point of the encryption.

    About the target

    The format the web is built on.

    A tree of elements and attributes, usually with CSS for styling and JavaScript for behaviour. The browser builds the page from it at request time.

    • Reflows to any screen size on its own
    • Semantic markup makes a document readable by a screen reader
    • Links, images and forms are all part of the format

    Real jobs

    What people are actually doing with EPUB

    Reading a book on a phone or tablet

    A school or library that distributes digital books

    Converting a book into plain text for study or search

    Specification

    The details, in one table

    Source formatEPUB — E-book
    Target formatHTML — HTML document
    Typical source size100 KB – 20 MB
    RunsIn your browser
    Account neededNo
    WatermarkNone
    File extension.epub → .html .htm

    How to

    EPUB to HTML, step by step

    1. 01

      Add your e-book

      Drag the file onto the drop zone, or tap to browse. Only one file is needed.

    2. 02

      Choose the HTML settings

      Set the HTML-specific options — everything happens locally, so the speed is your device, not a queue.

    3. 03

      Download the result

      The finished HTML downloads to your device. Nothing is uploaded and nothing is retained.

    Also available

    EPUB converts into

    PDFPDF documentTXTPlain textMDMarkdown

    Questions

    EPUB conversion questions

    What actually happens to my EPUB file when I convert it to HTML?

    The document is opened in a layout engine and re-saved in the target format, mapping each style onto the closest equivalent in the new format. So the EPUB file is unpacked, the content is laid out, and the result is written out as HTML. The text and the paragraph structure survives unchanged.

    Will converting EPUB to HTML reduce the quality?

    Partly. Styles that have no equivalent are approximated The text itself is never re-typed, so no words are lost.

    Is my EPUB file uploaded to a server?

    No. This EPUB to HTML conversion runs as JavaScript inside your browser tab. The file is read from your device and the result is written back to your device, so there is no upload step, no file-size limit and no copy of your EPUB file on any server.

    Do I need an account or will there be a watermark?

    Neither. There is no sign-up step, no email capture and no watermark on the output. The only limits are the ones your own device imposes.

    What is the most common mistake people make when converting EPUB to HTML?

    Styles are usually mapped by name, so renaming a style before converting can lose the mapping

    Why would somebody convert EPUB to HTML at all?

    Different teams use different formats, and the content should not be held hostage by that. In short: reading a book on a phone or tablet

    Something most people do not know about EPUB?

    A DRM-protected EPUB cannot be opened by anything except the store that sold it — that is the whole point of the encryption.