Convert HTML Document (.htm) to Electronic Publication (.epub) online for free. Fast, secure document conversion with no watermarks or registration.
Conversion settings — add a file to adjust
Upload your .html file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .epub file when it's ready.
HTM files are web pages stored with the truncated three-character extension. EPUB (Electronic Publication) is the open standard for reflowable ebooks, used by Apple Books, Kobo, Google Play Books, and virtually every ebook reader except Amazon Kindle. An EPUB file is actually a ZIP archive containing XHTML content files, a CSS stylesheet, a navigation document, and an OPF package descriptor that lists all resources and their reading order.
Converting HTM to EPUB repackages web page content into a standards-compliant ebook that adapts to any screen size. The reflowable XHTML inside the EPUB respects the reader's chosen font, text size, and color scheme while preserving the structural hierarchy of the original HTML — headings, paragraphs, lists, and images all translate naturally into the ebook format.
Publishing web content as EPUB makes it accessible to readers on dedicated e-ink devices like Kobo and PocketBook, tablet reading apps like Apple Books, and phone-based readers. EPUB's reflowable layout adjusts to portrait or landscape orientation and respects user accessibility settings like dyslexia-friendly fonts and high contrast. Unlike PDF, which preserves fixed page layouts, EPUB prioritizes readability across devices.
If you maintain technical documentation, blog posts, or educational content as HTM pages, converting them to EPUB creates downloadable offline reading packages. Self-publishing authors who maintain their manuscripts as HTML can convert to EPUB for distribution on the major ebook platforms.
The conversion process parses the HTM markup and restructures it into EPUB 3-compliant XHTML. HTML heading elements are used to generate the table of contents (toc.ncx and nav.xhtml). CSS styling is preserved within the EPUB's embedded stylesheet, though properties incompatible with ebook renderers (position, float, overflow) are stripped. Images referenced in the HTM are embedded into the EPUB's zip structure.
The resulting EPUB conforms to the EPUB 3.0.1 specification with a valid container.xml, content.opf (manifest and spine), and navigation document. Metadata including title and language can be inferred from the HTM's <title> and <html lang> attributes.
Text content, headings, lists, and basic formatting convert with excellent fidelity. Images are embedded at their original resolution. The table of contents is auto-generated from heading elements. Complex CSS layouts (multi-column, grid, absolute positioning) will be simplified to linear flow because EPUB readers use their own rendering engines. JavaScript is not supported in EPUB and is stripped during conversion.
| Device | HTML | EPUB |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No |
HTM-to-EPUB conversion provides a clean path from web content to the universal ebook format. Whether you are packaging documentation, articles, or a manuscript, EPUB ensures your content is readable on any device with proper text reflow and accessibility support.
Безопасная передача
Загрузки зашифрованы по HTTPS
Конфиденциальность прежде всего
Файлы автоматически удаляются после обработки
Без регистрации
Начните конвертировать мгновенно
Работает везде
| No |
Любой браузер, любое устройство
| Характеристика | HTML | EPUB |
|---|---|---|
| Полное название | HyperText Markup Language | Electronic Publication |
| Расширение | .html | .epub |
| Лучше всего подходит для | Web standard | Reflowable text |