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HTML to EPUB
Create a safe reflowable EPUB from a local HTML file, preserving basic text structure and embedded PNG/JPEG/GIF images.
HTML
EPUB
Browser only
Runs locally in your browser. Your files, pasted content and generated output are not uploaded. Reset clears this tool’s working data.
This tool needs JavaScript. If it does not load, refresh the page and try again.
How to use this tool
- Choose one local input file within the displayed limits.
- Provide a title, language tag and optional author.
- Choose Convert ebook. Cancel stops the worker.
- Download and inspect the result. Reset clears the input and result.
Examples
Convert a UTF-8 HTML document with headings and an embedded PNG to EPUB.
Limitations
- 20 MiB input; 16 MiB expanded text; 64 MiB output; 500 images up to 8 MiB each, 20 MiB total; cancellable worker with 60-second deadline.
- Semantic reading copies preserve basic text structure and embedded PNG/JPEG/GIF, not original layout, CSS, fonts, scripts or external resources. Image bytes retain metadata.
- MOBI: unencrypted versions 4–8, KF8/AZW3 and combined books, with raw, PalmDOC or HUFF/CDIC text. Compatible AZW only; KFX, Topaz and DRM are unsupported. Kindle/file-position links are omitted.
- FB2: FictionBook 2.0; UTF-8, BOM-marked UTF-16, Windows-1251/1252 or ISO-8859-1. A ZIP must contain exactly one FB2. DTDs, external entities and unsafe ZIP paths are rejected.
- HTML: UTF-8 file; title and language required; only PNG/JPEG/GIF data images are included. Relative and remote images are omitted.
- Metadata report is structural information, not a complete format, accessibility or conformance validator.
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