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Merge PDF
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EPUB Cover Extractor
Finds and extracts an EPUB's cover image, handling both the EPUB 2 and EPUB 3 ways of declaring one.
PDF
Nothing uploaded
No sign-up
Free, unlimited
Drop an EPUB filethe cover is read out of the archive in this page
Add a file to begin.
In short
An EPUB can declare its cover two different ways depending on its version. EPUB 3 marks the manifest item with properties="cover-image"; EPUB 2 puts a meta element named "cover" in the metadata pointing at a manifest id. Plenty of books do neither and simply include a file called cover.jpg, which is why a reader that checks only one method sometimes shows no cover for a book that clearly has one. The EPUB Cover Extractor on inputtesthub.com tries all three in that order and says which one found it, so a book declaring no cover at all is reported as a guess rather than a fact.
How to use the EPUB Cover Extractor
- Drop the .epub file in.
- Check how the cover was found — a guess is worth verifying.
- Download the image.
About the EPUB Cover Extractor
The EPUB Cover Extractor finds and extracts an EPUB's cover image, handling both the EPUB 2 and EPUB 3 ways of declaring one. It runs as plain JavaScript inside the page, which means there is no upload step, no queue and no size limit imposed by a server — the only limit is your own device.
What people use it for
- Getting a cover image for a library catalogue.
- Checking why a book shows no thumbnail in your reader.
- Reusing a cover at its original resolution.
Details
| EPUB 3 | properties="cover-image" on the manifest item |
|---|---|
| EPUB 2 | <meta name="cover" content="id"> |
| Neither | Guessed from a filename containing "cover" |
| Output | The original file, at its original resolution |
A book that declares its cover twice, once each way, is common and correct — publishers targeting both EPUB 2 and EPUB 3 readers do it deliberately. This checks the EPUB 3 form first because it is unambiguous.
Where this tool stops
Extracts a declared cover image. It cannot render the first page as a cover, which is the fallback some readers use for a book that declares none.
Frequently asked questions
Why does my reader show no cover?
Usually because the book declares one in a way your reader does not check. This tool reports which of the three methods found it — if the answer is "guessed from the filename", the book declares no cover at all and most readers will show a blank.
Can I get a bigger version?
No. What comes out is the file that is in the book, at whatever resolution the publisher put there. Some ebooks carry a cover barely larger than a thumbnail, and nothing can recover detail that was never included.
The cover is declared but missing from the file.
That happens, and it is reported rather than glossed over. Converted ebooks — particularly ones passed through several tools — quite often reference a cover that was dropped along the way.
Are there any usage caps on the EPUB Cover Extractor?
No charge and no sign-up. There is no free tier to run out of because there is no paid tier — inputtesthub.com is funded by advertising rather than by metering the tool.
Is the EPUB Cover Extractor safe to use with private information?
No. The EPUB Cover Extractor runs entirely in your browser using JavaScript. Because the work happens locally, the tool also keeps working if your connection drops, and closing the tab is all it takes to discard everything.
Who is the EPUB Cover Extractor for?
In practice it gets used for three things: getting a cover image for a library catalogue. Checking why a book shows no thumbnail in your reader. Reusing a cover at its original resolution. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
Is there anything the EPUB Cover Extractor cannot do?
Extracts a declared cover image. It cannot render the first page as a cover, which is the fallback some readers use for a book that declares none. Knowing where a tool stops being trustworthy matters more than the cases where it works.
What figures does the EPUB Cover Extractor work from?
EPUB 3 is <code>properties="cover-image"</code> on the manifest item. EPUB 2 is <code><meta name="cover" content="id"></code>. Neither is Guessed from a filename containing "cover". These are printed on the page itself, so you do not have to take them on trust.
Is there a file size limit?
There is no limit set by us, because your file is never uploaded — the only ceiling is the memory your own browser will give the tab. Very large files simply take longer to process, and a phone will give up sooner than a desktop.
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