Why does this tool produce HTML instead of EPUB?

Generating a valid EPUB file requires packaging multiple XML, CSS, and OPF files into a ZIP archive with a specific structure. While technically possible in a browser, the result is often rejected by e-readers due to missing metadata. Downloading the HTML and converting with Calibre (free, cross-platform) produces a standards-compliant EPUB in seconds.

Does my file get uploaded to a server?

No. The entire process happens in your browser using the FileReader API and JSZip. Your presentation never leaves your device.

Which file formats are supported?

Only .pptx (Office Open XML format). Older .ppt files (PowerPoint 97–2003) use a binary format that cannot be parsed client-side.

How do I convert the downloaded HTML to EPUB with Calibre?

Open Calibre, click "Add books" and select the downloaded HTML file, then click "Convert books". Set the output format to EPUB and click OK. The conversion takes a few seconds.

Are images and charts included in the output?

No. Only text content is extracted. Slide images, charts, and SmartArt graphics do not have a text layer that can be captured client-side.

Are speaker notes included?

Yes. Speaker notes are appended below each slide section in the HTML output, clearly labeled.

PowerPoint to EPUB Converter

Name: PowerPoint to EPUB Converter
Availability: InStock
Author: Nham Vu

Upload a .pptx file, extract slide content in your browser, and download it as structured HTML — then open in Calibre for true EPUB output.

Upload .pptx File

Click to choose a .pptx file or drag and drop here

For true EPUB output

Download the HTML file below, then open it in Calibre (free, cross-platform) and click Convert books → select EPUB as the output format.

HTML Preview

Upload a .pptx file and click "Extract" to preview the generated HTML here.

Downloaded!

Summary

Upload a .pptx file, extract slide content in your browser, and download it as structured HTML — then open in Calibre for true EPUB output.

How it works

Click "Choose File" or drag your .pptx file onto the upload area.
The tool reads the file locally with JSZip — nothing is uploaded.
Each slide's XML is parsed to extract all text content and speaker notes.
A clean HTML document is generated with one <section> per slide.
Click "Download HTML" to save the file, then open it in Calibre to export as EPUB.

Use cases

Convert a presentation to an ebook for offline reading on e-readers.
Prepare slide content for import into an ebook authoring workflow.
Archive a presentation in an open, reflowable format.
Share slide content with readers who do not have PowerPoint.
Feed extracted slide text into a document editor or CMS.
Create a mobile-friendly reading version of a long presentation.

Frequently Asked Questions

Related tools

Powerpoint To Txt Doc Powerpoint To Html Doc Powerpoint To Pdf Doc

Last updated: 2026-05-29 · Reviewed by Nham Vu