Is my EPUB file uploaded to a server?

No. The entire conversion happens inside your browser using the File API and JSZip. Your file never leaves your device.

What if the EPUB has no cover image?

The tool will tell you that no cover image was found. Some EPUBs omit a cover or store it in a non-standard location.

Which image formats can appear as the EPUB cover?

Most EPUBs embed covers as JPEG or PNG. This tool reads whichever format is present and outputs a PNG regardless.

Can I convert full ebook pages to PNG?

This tool extracts the embedded cover image only. Full page rendering requires a server-side renderer like Calibre or a headless browser.

What EPUB versions are supported?

EPUB 2 and EPUB 3 are both supported. Both use the same ZIP+OPF structure for cover image metadata.

Why is the downloaded file called cover.png?

The filename is derived from "cover" as a universal label. You can rename it after downloading.

EPUB to PNG Converter

Drop an EPUB file to extract its cover image and download it as PNG — runs entirely in your browser.

Upload EPUB File

Drag & drop an EPUB here

or click to browse

Upload an EPUB to see its cover preview here

Done!

Summary

EPUB files are ZIP archives that contain images, HTML, and metadata. This tool unzips your EPUB in the browser, reads the OPF manifest to locate the cover image, and renders it so you can download it as a PNG. Nothing leaves your device.

How it works

Select or drag an EPUB file onto the drop zone.
The tool unzips the EPUB archive client-side using JSZip.
It parses the OPF manifest (content.opf) to find the cover image entry.
The cover image is decoded and drawn onto an HTML5 Canvas element.
Click "Download PNG" to save the extracted cover to your device.

Use cases

Preview the cover art of an ebook before sharing it.
Extract a cover image to use as a thumbnail or social media graphic.
Quickly check which cover artwork is embedded in an EPUB file.
Convert EPUB cover art to PNG without installing desktop software.
Generate a cover preview for a self-published ebook.
Build a reading list with visual cover thumbnails.

Frequently Asked Questions

Last updated: 2026-10-05 · Reviewed by Nham Vu