Find the sticking points.
Upload your EPUB for a free check using EPUBCheck. See the errors and warnings in a report you can keep.
FOR INDEPENDENT AUTHORS & PUBLISHERS
EPUB errors?
Check for free.
Keep your words.
Seeing PKG-006 or PKG-007? Get a free EPUBCheck report and see whether we can repair your book’s packaging. Review the changes before you pay.
Check my EPUB — freeFree report. Supported repair download: $7 + applicable tax. No subscription.
A WORK IN PROGRESS
Every book
deserves its
next chapter.
deserves its
next chapter.
WORDS INTACT. STRUCTURE MENDED.
Your story stays yours.
A careful fix, from cover to container.
LET’S TAKE A LOOK
A healthier EPUB
starts here.
Get a free EPUBCheck report. If we can safely repair the structure, you’ll see exactly what changed before deciding to pay.
Your content stays intact.
Repairs preserve the bytes of your book’s XHTML, stylesheets, images, and fonts.
Bring your book.
Drop one EPUB file here, or choose it below.
Loading upload limits…
Access expires within 24 hours. Automatic deletion may be delayed during outages. Delete sooner at any time.
CHECKING
Checking your EPUB. Larger books can take a little longer.
BEFORE
AFTER
What changed
Passing EPUBCheck does not guarantee bookstore acceptance or correct display in every reading app.
Not buying today? Share why (optional)
Free checks are available. Paid repairs are not available right now.
A SMALL FIX. A CLEAR PROCESS.
From error to onward.
Know what we can mend.
We attempt supported structural repairs and check the result again. Review the before-and-after report and every change.
Keep your book moving.
If the repair passes validation and content preservation checks, pay $7 once to download it. No supported fix? No payment.
CAREFUL BY DESIGN
We mend the structure.
You keep the story.
Some EPUB errors come from the package around your book: how the ZIP is assembled, how files are declared, or how the container points to them. That’s where we help.
We don’t rewrite text, redesign pages, or remove DRM. Some books will need changes in your original publishing tool. If unsupported errors remain, we’ll give you the report without offering a paid download.
GOOD QUESTIONS
Before you turn
the page.
What exactly does a repair change?
We handle supported structural issues, such as EPUB ZIP packaging, file-type declarations in the package document, and conservatively repairable container errors. Each result lists the changes. Your content XHTML, CSS, image, and font bytes are preserved.
What if my EPUB is already valid?
You get the free report. There is no repair to buy. Keep using your original file, and review any warnings the checker finds.
Will the repaired file be accepted by every bookstore?
We can’t guarantee that. EPUBCheck validates EPUB rules; stores may have additional requirements. You should also preview your book in the reading apps you plan to support.
How long do you keep my book?
The original is removed after processing. Access to repaired files and reports expires within 24 hours of upload. Expired files are deleted automatically while the service is running. If an outage or storage error delays deletion, cleanup retries when service resumes. You can delete files sooner from your report. Download your repaired EPUB before access expires, and keep this browser session to return to your report.
Is this a subscription?
No. The repair download is a one-time $7 purchase per book. Checking and downloading the validation report are free. You see the repair result before checkout.