Change EPUB Cover Online — Free EPUB Cover Editor

Swap the cover image on an EPUB you already own, and edit its title, author, language, and publisher at the same time — then download the updated book. Everything runs locally in your browser, and your chapters, formatting, and structure are preserved exactly as they were.

Replace cover image
JPEG, PNG, or WebP — about 1600 px on the longest side works well. Replaces the existing cover entry in the manifest; leave this empty to keep the original cover.
Metadata (optional)
BCP 47 code: en, es, fr, ja, ar, etc.
Waiting for EPUB…

How to change an EPUB cover

The cover is the one part of an e-book you see before you read a word of it — and it is the part publishers, converters, and bulk downloads get wrong most often. An EPUB is a zip archive with an image flagged as the cover inside it, so swapping that image is a repackaging job, not a re-conversion. This tool does exactly that in your browser: the text of the book is copied across untouched and only the cover entry and the metadata fields you edit are rewritten.

  1. Choose your EPUB file above. It is read locally and inspected straight away — you'll see the EPUB version, the cover image it found, and how many items are in the manifest.
  2. Pick a new cover under Replace cover image. A thumbnail preview appears so you can check you grabbed the right picture before committing.
  3. Edit the metadata too, if you like — title, author, language, and publisher are pre-filled from the book, and anything you leave alone stays as it was.
  4. Click Apply Changes and Download. The book is repackaged and saved to your device, ready to send to a reader or an e-ink device.

Change an EPUB cover without Calibre

Most advice about editing an EPUB cover starts with "install Calibre". That is a fine answer if you manage a whole library, but it is a heavy download and a long detour when all you want is a different picture on one book. This page needs no install and no account: the EPUB never leaves your machine, because the unzip, the cover swap, and the re-zip all happen in the browser tab. It is the quick path for a single book, and Calibre remains the better tool if you also want to convert formats, edit chapters, or manage hundreds of files.

Why the new cover keeps the original's place in the book

An EPUB points at its cover in one of a few different ways, depending on which tool built it — an EPUB 3 manifest item marked cover-image, or an older EPUB 2 meta name="cover" pointing at a manifest ID. This tool looks for all of those, then writes your new image into the entry it finds and corrects the recorded media type and file extension to match what you uploaded. That matters because a cover the reader app cannot resolve simply does not display: getting the manifest right is the difference between a new cover and a blank grey rectangle in your library.

What if your EPUB has no cover at all?

Some EPUBs — particularly ones generated from plain text or scraped pages — ship with no cover entry whatsoever. There is then nothing to replace, so this tool will repackage the book with your metadata changes and leave it cover-less. Adding a first cover means rebuilding the book's manifest rather than editing it, which is what our Images to EPUB and Text to EPUB builders do — both write a proper cover in as they create the file.

Choosing a cover image that looks right on every device

Aim for roughly 1600 px on the longest side in a portrait shape close to 1:1.5 — that is sharp on a high-DPI tablet and still scales down cleanly to a library thumbnail. JPEG suits photographic covers and keeps the file small; PNG is better for flat art, lettering, and hard edges, where JPEG compression leaves visible fringing around text. Very large covers are the usual reason a rewrapped EPUB balloons in size, so there is little point going far beyond 2000 px.

The old cover is still showing — what now?

This trips up nearly everyone: you swap the cover successfully, re-send the book, and your library still shows the old artwork. Reader apps cache cover thumbnails against a book identity rather than re-reading the file, so the fix is to make the app treat it as a new arrival. Delete the book from the device or app first, then add the updated file; renaming it slightly before you re-send is usually enough on Kindle. Opening the book itself normally shows the correct new cover even while the library grid is still stale.

Editing title, author, and language while you are here

Wrong metadata is why e-books end up filed under "Unknown Author" or sorted by the wrong word. The fields above map to the book's real Dublin Core metadata — dc:title, dc:creator, dc:language, and dc:publisher — so the values you set are the ones your reader sorts and searches on. A correct BCP 47 language code is worth setting properly too: it drives hyphenation and dictionary lookups, which is why an English book tagged as something else gets odd line breaks.

More e-book tools

Building or fixing up a library from other formats? These sibling tools also run entirely in your browser:

CBZ to EPUB PDF to EPUB (Kindle) Images to EPUB Text to EPUB DOCX to EPUB

Frequently Asked Questions

Choose your EPUB above, open Replace cover image, pick a JPEG, PNG, or WebP, then click Apply Changes and Download. The new image takes over the original cover's entry in the book's manifest, so e-readers pick it up as the real cover. Your chapters are left untouched.

Yes — that's exactly what this page is for. Calibre is a full library manager you have to download and install; this runs in the browser tab you already have open. There's no signup, nothing is uploaded, and what you get back is a standard EPUB any reader will open.

Then there is no cover entry to swap, and the tool will repackage the book with your metadata edits only. This page replaces an existing cover rather than adding a brand-new one. If your book has no cover yet, build a fresh EPUB that includes one with our Images to EPUB or Text to EPUB tools.

Around 1600 px on the longest side, in a portrait ratio near 1:1.5, saved as JPEG, PNG, or WebP. That stays sharp on high-DPI tablets without bloating the file. The new image keeps the original cover's manifest entry, and its file extension is corrected to match the format you upload.

No. The file is read locally in your browser; nothing is uploaded to a server.

Only the metadata you edit (title, author, language, publisher) and the cover image if you replace it. Chapter content, formatting, and structure are preserved.

Reader apps cache cover thumbnails per book, so a re-imported file often keeps the old picture in your library view. Remove the book from the device or app, then re-add the updated file. Renaming it slightly before you re-send it also forces a fresh thumbnail.

No. Encrypted or rights-managed EPUBs can't be repackaged. Use this only on EPUBs you own and have the rights to modify.

Slightly. The repackage uses standard DEFLATE compression for the content files (and STORE for the mimetype, per spec). If you swap in a much larger or smaller cover, that will dominate the difference.

Only if the problem is metadata-related. Structural damage — a missing OPF, broken navigation, a corrupt zip — needs a fuller repair than a repackage.