WaywardTools

Document conversion that stays on your machine

EPUB HTML Swap

EPUB to HTML

Your file never leaves this device. Conversion runs in your browser. The document itself is not uploaded.

1 · Choose a EPUB file

…or drop a EPUB file here

.epub · stays in this tab

2 · Convert

3 · Download

Choose a file to convert. It is not uploaded.

FAQ and format details
Why convert EPUB to HTML?

You want to quote a book you legally have as EPUB, restyle it, or push it through Markdown/DOCX. A single HTML file is easier to search in a browser than a dozen spine documents. It is also how you inspect what a sloppy generator actually put in the package.

How this conversion runs

JSZip loads the package. The OPF spine order wins, not the folder sort. Each XHTML body is sanitized (scripts gone) and appended as a <section>. Relative images that exist in the ZIP become data URLs. Per-chapter CSS is not applied — one flattened document cannot honor ten stylesheets faithfully.

Keep in mind for EPUB → HTML

Fixed-layout EPUBs (comics, children's books) will look wrong. DRM (Apple, Adobe, Kobo) will fail or be empty — we do not break encryption. Media overlays and SVGs may drop. A book that is mostly images will produce a huge HTML file or missing figures.

After you have a HTML file

Read the HTML end to end. If you needed chapters as separate files, stay in EPUB and use Sigil. From HTML you can go to Markdown for notes or DOCX for review. HTML→EPUB will re-split on h1, which may not match the original spine.

Why did my Kindle book fail?

Kindle files are usually AZW3/MOBI/KFX, not EPUB. Convert in Calibre to EPUB first if the license allows, then drop that EPUB here.

Do you keep the original CSS?

No. Flattening chapters means we drop per-file styles rather than pretend a single page has one cascade. Semantic tags remain.

This pair at a glance
Accepts
.epub
Writes
.html · text/html
Read fidelity
high (EPUB → HTML)
Write fidelity
exact (HTML → HTML)
Source size
Plan for files under 38 MB

The file is read in this tab. It is not uploaded.

Something off with this pair? Send feedback.

About EPUB and HTML

Source file

EPUB

The open ebook format: a ZIP of XHTML chapters, CSS, and a package manifest. What Apple Books, Google Play Books, and most non-Kindle readers consume.

EPUB 3 is HTML in a spine. That makes the HTML hub almost native: we concatenate or split XHTML documents and rewrite the OPF package. Kindle’s AZW/MOBI family is a different type and is not in this matrix.

Extensions
.epub
MIME types
application/epub+zip
Kind
zip · binary
Category
ebook
Standard
Open format · since 2007
Comfortable size
Up to about 38 MB in this browser converter
Read into HTML
high fidelity · implemented — Spine XHTML documents are concatenated in reading order.

What this format can hold

  • headings
  • paragraphs
  • lists
  • links
  • images
  • inline formatting
  • chapters
  • table of contents

Usually dropped on the way in

  • per chapter css
  • fixed layout pages
  • media overlays
  • encryption

Apps that consume EPUB

  • Apple Books (Apple) — opens on macOS, iOS
  • Google Play Books (Google) — opens on Web, Android, iOS
  • Calibre — creates and opens on Windows, macOS, Linux
  • Thorium Reader — opens on Windows, macOS, Linux
  • Foliate — opens on Linux
  • Kindle (via conversion) (Amazon) — opens on e-ink, iOS, Android
  • Sigil — creates on Windows, macOS, Linux

Catalog notes

  • DRM-encumbered EPUBs are rejected.
  • Kindle AZW3/MOBI is a later type, not an alias of EPUB.

Destination file

HTML

The web’s native document format: structured markup for headings, paragraphs, lists, tables, links, and media.

HTML is the pivot format for this converter. Incoming files are turned into a sanitized HTML document, and outgoing files are generated from that document. Browsers, email clients, and most rich-text editors already speak it, which is why it is the most flexible interchange point.

Extensions
.html, .htm, .xhtml
MIME types
text/html, application/xhtml+xml
Kind
text · utf-8
Category
markup
Standard
Open format · since 1993
Comfortable size
Up to about 7.6 MB in this browser converter
Written from HTML
exact fidelity · implemented — Pretty-printed full HTML document with a generated title.

What this format can hold

  • headings
  • paragraphs
  • lists
  • tables
  • links
  • images
  • inline formatting
  • semantic structure

Apps that consume HTML

  • Chrome (Google) — opens on Windows, macOS, Linux, Android
  • Firefox (Mozilla) — opens on Windows, macOS, Linux, Android
  • Safari (Apple) — opens on macOS, iOS
  • Edge (Microsoft) — opens on Windows, macOS
  • VS Code (Microsoft) — creates on Windows, macOS, Linux
  • WordPress — creates and opens on Web

Catalog notes

  • Scripts, event handlers, and external stylesheets are stripped during conversion so the hub stays a document, not an app.
  • XHTML is accepted as input and emitted as HTML5.
Other conversions

Other conversions from EPUB: MarkdownWordRTFOpenDocumentPDF

Other ways to get HTML: MarkdownWordRTFOpenDocumentPDF