HTML to EPUB Converter
Convert HTML documents to EPUB in your browser. EPUB is ideal when you need books and long-form reading across devices, while HTML is better known for opens in any browser and is easy to edit or restyle.
- Files never uploaded
- Instant, on-device
- Free & no sign-up
Drop HTML files here, or browse
HTMLEPUB · files stay on your device
up to 30 MB per file · up to 20 files per batch
How to convert HTML to EPUB
- Step 01
Add your HTML file
Drop one or many HTML files onto the converter, or browse from disk. Stay within the on-device size limits shown under the drop zone — oversized files are rejected so your tab does not freeze.
- Step 02
Convert the book
Reflow HTML into EPUB entirely in this tab — useful for personal libraries and manuscripts you would not upload.
- Step 03
Download EPUB
Download your new EPUB file immediately. Multiple outputs pack into a single ZIP archive.
Why convert HTML to EPUB
HTML (web document) works well when web previews, offline reading in a browser, and content cleanup. EPUB is the better destination when you need reflowable reading on phones, tablets, and e-readers. This HTML to EPUB tool keeps manuscripts and personal libraries on-device while you reflow them for readers, print, or the web.
When to use this tool
- A tool, form, or teammate asked for EPUB, but you only have HTML.
- You are optimizing for books and long-form reading across devices instead of staying in HTML.
- You are moving a book between readers, print, and web formats — EPUB fits the next step better than HTML.
Good to know
- Output characteristics follow EPUB: reflowable reading on phones, tablets, and e-readers.
- Source quirks still apply — HTML is limited by not a dedicated ebook package with spine metadata, and conversion cannot invent missing data.
- Reflowable books may paginate differently after conversion; DRM-protected store books cannot be converted.
- Browser limit: about 30 MB per book, up to 20 files per batch, with very long texts capped around 500,000 characters.
- Need a bigger file? For large manuscripts or publisher packages, use Calibre, Sigil, or your word processor’s export, then convert a trimmed personal copy here if needed.
File size limits for HTML to EPUB
Browser limit: about 30 MB per book, up to 20 files per batch, with very long texts capped around 500,000 characters.
Why there is a limit
Ebooks are unpacked and reflowed in memory. Massive manuscripts can stall PDF generation, so size and length caps keep conversions private and responsive.
If your file is too large
For large manuscripts or publisher packages, use Calibre, Sigil, or your word processor’s export, then convert a trimmed personal copy here if needed.
HTML to EPUB FAQ
Common questions about converting HTML files to EPUB.
Is this HTML to EPUB converter free?
Yes. Browser Convert does not charge for HTML → EPUB, add watermarks, or require an account.
Does HTML to EPUB keep chapters and images?
Text flow is preserved as faithfully as the formats allow. Complex layout, scripts, and some media may simplify depending on EPUB.
Can I convert DRM-protected books from HTML to EPUB?
No. Store DRM must be removed only through legitimate means. Browser Convert converts unprotected personal files locally.
Is HTML to EPUB conversion private on Browser Convert?
Yes. Your HTML document is processed in the browser. We do not upload the file to convert it, which is the main difference from typical online converters.
Are there file size limits for HTML to EPUB?
Yes. Browser Convert accepts about 30 MB per file, with up to 20 files queued at once. Ebooks are unpacked and reflowed in memory. Massive manuscripts can stall PDF generation, so size and length caps keep conversions private and responsive. If your file is larger, For large manuscripts or publisher packages, use Calibre, Sigil, or your word processor’s export, then convert a trimmed personal copy here if needed.
Can I convert several HTML files to EPUB at once?
Yes. Queue up to 20 HTML files and convert them in one pass. When finished, download the batch as a ZIP. Very large batches may need to be split so your browser stays responsive.