The Snowflower EPUB Validator can easily check the problem of EPUB format e-books.

Even if you apply for registration of an e-book created by you to the store, even if you do not pass the review due to the problem of the EPUB file, or if the review goes through, the purchaser’s e-book reader may display problems. The Snowflower EPUB Validator automatically and quickly finds problems that are hard to find by visual inspection and reports it clearly. If you check the EPUB file for problems before registering to the store, It is possible to suppress the occurrence of problems.

## Features

* Supports specification of EPUB 2 & 3
* Easy operation of drag & drop of EPUB file is possible
* EPUB problems are reported at three severity levels: fatal, error, and warning.
* Work offline without uploading EPUB files to external server.
* IDPF EpubCheck 4.2.2 built-in

## Notes

The Snowflower EPUB Validator strictly checks EPUB specifications. Therefore, a major EPUB leader may also detect potential problems with compatibility that will not cause problems.

What’s New

Version 2.3.2

This release includes the following changes:

* Support for text wrapping display option for source code
* Fixed an issue where the source code may not be displayed.

Ratings and Reviews

2.0 out of 5
1 Rating

1 Rating

LRH01 ,

Confusing Feedback

It is pretty easy to run the ePub check, but the feedback on the file is not clear. It seems you need to have coding experinece or something similar to make sense of the feedback. Definitely not workth $24.95 unless you have coding experince. If you have coding experience, there are plenty of free opitons online for this, so no need for this.

Developer Response ,

Snowflower EPUB Validator performs offline validation. It provides users with the following great benefits:

* High availability: No unavailability issues with server maintenance. Stable verification of large EPUB files. Online services always have strict file size limits.

* High Confidentiality: Does not upload the verified EPUB file to an external server. Your EPUB file before publication will never be leaked.

* Fast iteration: You can quickly repeat trial and error corrections on your computer.

App Privacy

The developer, Naohiro Yoshimoto, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


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