Change an EPUB cover
Replace the cover image on a book — useful when a converted file has none.
How to change an EPUB cover
- 01 Choose your EPUBDrop the book you want to change.
- 02 Pick a cover imageA JPEG or PNG. Portrait at roughly 1600×2560 looks right on every device.
- 03 DownloadThe new image replaces the old cover and is registered in the manifest.
Questions
What size should the cover be? ＋
Portrait, around 1600×2560 pixels, at a 1:1.6 ratio. Smaller works but looks soft on a modern screen.
What if the book has no cover at all? ＋
One is added and registered properly, so readers pick it up.
JPEG or PNG? ＋
JPEG for photographic covers, PNG for flat artwork and type.
Are my files private? ＋
This tool runs entirely inside your browser — your file is never uploaded anywhere. It stays on your device, and closing the tab is all it takes to remove it.
Is it really free? ＋
Yes. Every tool, no size cap, no account. There is no paid tier and nothing is held back.