EPUB (Electronic Publication) and HTML (HyperText Markup Language) are built for different jobs. EPUB is typically used for e-readers, phones, tablets, while HTML is best for web pages, e-mail templates. Converting lets you open, share or upload your files wherever HTML is expected.
How to use the EPUB to HTML converter
- Add your EPUB filesClick “Choose Files” or drag and drop them into the box. You can add many files at once — or paste a file with Ctrl+V.
- Choose HTML and adjust settingsHTML is selected automatically. Optionally open Settings to change output options.
- Convert and downloadPress “Convert”. Your HTML files appear instantly — download them one by one or all together as a ZIP.
EPUB vs HTML
EPUB Electronic Publication
EPUB is the open e-book standard. Text reflows to fit any screen and it is supported by Apple Books, Kobo, Google Play Books and — since 2022 — Kindle via Send to Kindle.
- Compression
- ZIP-compressed XHTML
- Features
- Reflowable text
- Origin
- 2007, IDPF/W3C
- Best for
- E-readers, phones, tablets
HTML HyperText Markup Language
HTML is the language of web pages. An HTML file opens in any browser and keeps headings, links, lists and images.
- Compression
- Text markup
- Features
- Links, images, styles
- Origin
- 1993, W3C
- Best for
- Web pages, e-mail templates
Why use ConvertMathly?
Files are processed on your device and never uploaded. Close the tab and they are gone.
No account, no daily cap, no queue and no watermark — convert as much as you want.
No waiting for uploads or downloads: results are ready as fast as your device can process them.
Windows, Mac, Linux, Chromebook, iPhone and Android — any modern browser, nothing to install.
Frequently asked questions
How do I convert EPUB to HTML?
Add your EPUB files above, make sure HTML is selected and press Convert. The HTML files are ready to download a few seconds later — no installation or account required.
Is there a file size or daily limit?
No. Since everything runs locally, there are no daily caps, queues or file size limits beyond what your device can handle.
Are my EPUB files uploaded to a server?
No. ConvertMathly converts files entirely inside your web browser using JavaScript and WebAssembly. Your files never leave your computer or phone, which makes it safe for private photos and documents.
Can I convert multiple EPUB files at once?
Yes — add as many files as you like. They are converted one after another and you can download everything in a single ZIP.