[Editor Plugin] epubveri

Doitsu · 08-20-2026, 03:27 PM

This very simple plugin allows you to validate the EPUB currently open in the Edit Book tool using epubveri, a pure-Rust EPUB validator.

It automatically downloads/updates the epubveri binary from GitHub as needed and shows validation results in a dock widget, similar to the built-in Check Book tool.

You can select one or more messages using SHIFT/CTRL+click or CTRL+A and copy them to the clipboard as tab-delimited text.
However, this feature might not work in macOS and certain Linux distros.

DISCLAIMER: This plugin was created with the help of Claude.ai.

License: GNU General Public License v3 (GPL-3)

Version History

Spoiler:

JSWolf · 08-20-2026, 03:47 PM

One issue so far. It opens the output window at the bottom of the screen instead of the top where the epubcheck plugin does.

Comfy.n · 08-21-2026, 05:12 AM

Hi!

IMO, the advantage of this implementation is that EPUBCheck and epubveri outputs are displayed in separate UI locations. FYI, I have added epubveri to the calibre Index of Plugins.

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JSWolf · 08-21-2026, 05:57 AM

Quote:

Originally Posted by Comfy.n

Hi!

IMO, the advantage of this implementation is that EPUBCheck and epubveri outputs are displayed in separate UI locations. FYI, I have added epubveri to the calibre Index of Plugins.

Attachment 225294

That's true. What would work is to have an option to have the output window on the bottom or use the one at the top. Because once epubveri is finished, there will be no need for two different windows.

thiago.eec · 08-21-2026, 04:34 PM

Quote:

Originally Posted by Comfy.n

FYI, I have added epubveri to the calibre Index of Plugins.

It can't see it using calibre.

Comfy.n · 08-21-2026, 04:42 PM

Quote:

Originally Posted by thiago.eec

It can't see it using calibre.

Noted, thank you. I'm looking into it. The plugin is there, but there might be an issue with the parser.

JSWolf · 08-21-2026, 04:45 PM

Sometimes it takes a little bit for a new plugin to show up.

JSWolf · 08-23-2026, 11:02 AM

This was updated almost 6 hours ago and the new version is not yet showing up in calibre? Is there something wrong somewhere?

Comfy.n · 08-23-2026, 11:26 AM

Quote:

Originally Posted by JSWolf

This was updated almost 6 hours ago and the new version is not yet showing up in calibre? Is there something wrong somewhere?

Noted. The initial delay for it show up in the plugin updater was likely due to 429 errors on MR side. The current delay for the updater to serve version 0.0.6 could be the same, so let's wait a bit.

JSWolf · 08-23-2026, 11:31 AM

Quote:

Originally Posted by Comfy.n

Noted. The initial delay for it show up in the plugin updater was likely due to 429 errors on MR side. The current delay for the updater to serve version 0.0.6 could be the same, so let's wait a bit.

429 errors? Why so many errors?

Comfy.n · 08-23-2026, 11:32 AM

I mean error type 429

Doitsu · 08-23-2026, 11:38 AM

FYI: I've just checked this. plugins.json.bz2 was updated a couple of minutes ago and the update is now shown in Calibre.

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08-20-2026, 03:47 PM	#2
JSWolf Resident Curmudgeon Posts: 84,619 Karma: 153744815 Join Date: Nov 2006 Location: Roslindale, Massachusetts Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3	One issue so far. It opens the output window at the bottom of the screen instead of the top where the epubcheck plugin does.

08-21-2026, 05:12 AM	#3
Comfy.n want to learn what I want Posts: 2,421 Karma: 9656783 Join Date: Sep 2020 Device: Libra Colour	Hi! IMO, the advantage of this implementation is that EPUBCheck and epubveri outputs are displayed in separate UI locations. FYI, I have added epubveri to the calibre Index of Plugins.

08-21-2026, 04:45 PM	#7
JSWolf Resident Curmudgeon Posts: 84,619 Karma: 153744815 Join Date: Nov 2006 Location: Roslindale, Massachusetts Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3	Sometimes it takes a little bit for a new plugin to show up.

08-23-2026, 11:02 AM	#8
JSWolf Resident Curmudgeon Posts: 84,619 Karma: 153744815 Join Date: Nov 2006 Location: Roslindale, Massachusetts Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3	This was updated almost 6 hours ago and the new version is not yet showing up in calibre? Is there something wrong somewhere?

08-23-2026, 11:32 AM	#11
Comfy.n want to learn what I want Posts: 2,421 Karma: 9656783 Join Date: Sep 2020 Device: Libra Colour	I mean error type 429

08-23-2026, 11:38 AM	#12
Doitsu Grand Sorcerer Posts: 5,896 Karma: 24240563 Join Date: Dec 2010 Device: Kindle PW2	FYI: I've just checked this. plugins.json.bz2 was updated a couple of minutes ago and the update is now shown in Calibre.

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