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Free online tool — no registration, no watermarks, no limits.
To convert EPUB to HTMLZ: upload your file using the form below, select HTMLZ as the output format, and click Convert. Our Calibre-powered engine processes the conversion in seconds with no registration required. The converter preserves text content, chapter structure, images, and metadata. For batch conversions of up to 50 files, upgrade to Pro.
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HTMLZ is widely supported on many e-readers and devices. Convert to read your books anywhere.
Future-proof your ebook collection by converting to open, widely-supported formats.
No software to install. No account needed. Convert in seconds, not minutes.
| Feature | EPUB | HTMLZ |
|---|---|---|
| DRM Support | Yes | Varies |
| Image Support | Yes | Yes |
| Reflowable Text | Yes | Varies |
| Open Standard | Yes | Varies |
Yes! Our EPUB to HTML converter is completely free to use. No registration required, no watermarks, no hidden fees. Convert up to 5 files per hour for free.
Our converter uses the Calibre engine, which preserves most formatting including fonts, images, tables, and layout. However, some complex formatting may change slightly due to differences between EPUB and HTML format capabilities. The result is optimized for readability on your target device.
Absolutely. All files are transferred over encrypted HTTPS connections. Your original file and converted file are automatically deleted from our servers within 1 hour. We do not read, store, or share your content.
Free users can convert files up to 10 MB. Pro users enjoy up to 50 MB per file and unlimited conversions.
Batch conversion is available with our Pro plan ($5/month). You can upload multiple files at once and convert them all in a single session, saving you time.
Deepen your understanding with expert conversion guides:
“BookConv saved me hours of manual work. I convert all my manuscript drafts to EPUB and MOBI in seconds. The quality is perfect — no formatting loss at all.”
Sarah Mitchell
Self-published author
“We use BookConv daily to help our patrons convert old LIT files to modern formats. It's fast, free, and requires no software installation. A must-have tool.”
James Rodriguez
Librarian
“I've tried many converters, but BookConv is the only one that handles FB2 and AZW3 without issues. The batch conversion feature is a game-changer for my workflow.”
Yuki Tanaka
Digital content creator