r/Calibre Dec 08 '25

Announcement Patch Notes v 8.16

23 Upvotes

New features

  • Allow asking AI questions about any book in your calibre library. Right click the "View" button and choose "Discuss selected book(s) with AI"
  • AI: Allow asking AI what book to read next by right clicking on a book and using the "Similar books" menu
  • AI: Add a new backend for "LM Studio" which allows running various AI models locally

Bug fixes

  • Use a named local timezone for better display of historical dates in the local timezone
  • PDF Input: Fix a regression in the new PDF input engine that caused HTML markup to not be always escaped
  • Get books: Update amazon.it store plugin
  • Fix addition of format specific options when using calibredb catalog with command line flags
  • calibredb catalog: Fix generation of language field in BiBTeX catalogs
  • Fix incorrect series index when downloading metadata from amazon.co.jp
  • Fix a regression in the previous release that caused the case change menu to not be present in the comments editor.
  • Fix a bug in 8.16.0 that prevented the Ask AI what to read next feature from working
  • Fix a crash in 8.16.0 that caused using the "Close" button in Ask AI to crash calibre on some systems

r/Calibre Apr 04 '25

Announcement Update to moderation regarding to piracy (rule 4)

465 Upvotes

Despite the community rules being pretty clear on the topic, it seems a reminder is needed that this sub has a strict "no piracy" rule. Every day there are numerous posts and even more comments that are either seeking info on how to pirate books, wanting help in making use of books they've pirated, or are people flat out encouraging others to pirate and listing off websites where they can do it. Up until now those posts have simply been deleted as they've been seen, but going forward any users found ignoring rule 4 will be banned from the Calibre sub.

Calibre is a platform that helps everyone organize their eBooks and if you want a book bad enough to read it, you should want the author who wrote it to receive compensation for the work they put into it. If you don't, then this community isn't the place for you to brazenly discuss that moral failure.

Thank you to those who wish to continue keeping this sub in good standing with Reddit and on the right side of copyright laws and basic human decency. If that's not you, feel free to head on out. Thanks.

Edit: Well it's been a lovely day of people trying to argue that piracy is fine, or that removing DRM of books you own is just as much pirating as outright stealing a book you haven't paid for, but I've wasted more time than was worthwhile trying to reply to people. At the end of it all, rule 4 stands and this post was made to serve as a reminder of it and a warning of repercussions for ignoring it. That's it. To those who had civil discourse or expressed understanding of this, thank you.


r/Calibre 2h ago

Support / How-To Database disk image is malformed

2 Upvotes

Yesterday I put a bunch of books on my Kobo. Last night I went to read and none of the books show up. Today I went back to Calibre to see what's going on, and I got the above error message. The books do show when I look at my Kobo on the computer, but I can't find them anywhere on my device.

I don't know what that error means--it was fine yesterday. I don't know where to go from here, and the help Kobo is offering is only for books I purchased or borrowed from them. I did a sync and repair on the Kobo. Where do I go from here?


r/Calibre 7h ago

General Discussion / Feedback Sutra is back in Europe! + Sneak Peek at CBZ & Panel-by-Panel Comic Support

Post image
2 Upvotes

Hey everyone, good news for those who asked: Apple finally approved the updated forms, and Sutra (my iOS reader for Calibre, Kavita and other OPDS feeds) is officially back in the European App Store!

Sneak Peek: CBZ & Smart Panel Support
I’m currently deep in the weeds building panel-by-panel comic support. As you can see in the attached comparison image, tapping the bottom-right icon isolates individual panels to fit your screen natively, making reading on smaller devices dramatically better.

Comics have wildly different panel definitions and chromas, so getting this consistent across my test bench is taking up all my free time outside of my day job and family. Because this is the core feature of the next update, I want it to be close to perfect before shipping - so the release may slip to next week.

Thanks to everyone using the app, and do let me know if you have any feedback on the preview!

👇 Download Sutra here


r/Calibre 9h ago

Support / How-To Deleting old version of Kindle book after editing metadata

2 Upvotes

When I edit the metadata for a Kindle book (e.g., cover or author name) that is already loaded onto my Kindle Paperwhite 11th generation and then send the edited version to my Kindle, I always end up with both the original and the edited versions. I can't find a way to delete the original off my Kindle other than permanently deleting it from my Amazon content. I see many suggestions in other posts to use a filter to show just the new one, but has anyone found a way to remove the older version other than permanently deleting?


r/Calibre 8h ago

Support / How-To Trouble with KFX to EPUB conversion

1 Upvotes

Hello, I'm for some reason not able to convert a KFX file (definitely DRM-free, I have both related plug ins) to EPUB. I'm encountering the following error:

ERROR: KFX conversion failed: <p><b>Cannot convert [name of the book] </b><br/><br/>KeyError('YJFragmentList item is missing: c0:: $260::')</p>

Following advice in a similar Reddit post, I've also tried converting via KCC, but it doesn't seem to work either. What do I do? Thanks in advance for any help!


r/Calibre 9h ago

General Discussion / Feedback Kindle Version

0 Upvotes

I'm currently using version 2.4.0 of Kindle, but this version doesn't allow me to download books so I can later extract them using Calibre. What is the latest version that allows me to download books and that the program can use to remove the DRM?


r/Calibre 9h ago

Support / How-To How to get from Kindle android to pdf ?

1 Upvotes

I have one book from on Kindle android and wanna get it in the form of pdf on my pc and store in my pendrive.

Year ago i tried one using Calibre using Dedrm android key or something i don't remember please help.


r/Calibre 23h ago

Support / How-To Column sorting

4 Upvotes

When I click on a column header and sort it ascending/descending, why doesn't it also sort alphabetically in columns like Format? It works when I sort by Title or Author. But when I sort the Format column, it does not group all formats together alphabetically. Anyone have any idea?


r/Calibre 16h ago

General Discussion / Feedback Help successful installation of KoReader on move! But can not connect to calibre

1 Upvotes

Today finally installed remanager and KoReader on my remarkable move. Everything seems ok, KoReader runs. But i can’t connect to calibre server. Yes the server run. I get a handshake error.

Calibre runs on my macbook Pro M1 both latest version.

somebody have a clue?


r/Calibre 16h ago

Support / How-To Books Not Listed as 'on device'

1 Upvotes

Even though all of my books are imported from Calibre to my Kobo Libra Colour, only about half of them are listed as such. I have tried deleting the books (and their respected folders) from the e-reader and then resending from Calibre but the issue persists. The book is sent to the e-reader and has a green check mark indicating that it is on the device, but upon ejecting and reestablishing the connection the book is no longer listed as onboard (even though it is). What am I overlooking?

I am running koreader with a few plugins, but I haven't had the issue with this setup previously.


r/Calibre 1d ago

General Discussion / Feedback There's a new Calibre-compatible Android app with a very responsive dev (no affiliation)

34 Upvotes

I was searching for OPDS capable Android apps for audiobooks a couple of weeks back and happened upon a very new, very low user count app called Noctium. It has OPDS support and combines audiobook and ebook reading in one app, but it was bugged beyond usefulness for me two weeks ago with M4Bs not being downloadable at all until I added a mime type for it in Calibre and then them downloading as epubs and being corrupted. I reached out to the dev and was a bit shocked when I got a reply two hours later detailing how everything would be fixed in the next release, including manual format mapping that doesn't require the mime type (it picks it up from metadata and guesses download link instead of needing the OPDS to state it explicitly).

Since then I've emailed the dev multiple times and been more and more impressed at how responsive they are. Even minor shit like fixing the manifest so the app is selectable as a a favorite media app in Samsung's good lock sound extension is now in, as well as a suggestion for a setting to override bluetooth AVRCP skip commands. The ereader side is also quite decent with accessibility support that's still missing from far more veteran apps.

There's still issues. I sent a dozen issues/bugs after the update hit the store yesterday, but I imagine those will be handled in short order. The app has a bit of an obnoxious ad placement (with an ad free unlock) and the update introduced a prompt for data sharing consent that I'm not thrilled about, but given that it's now (according to my email) 2 years 8 months since I reported the manifest issue to the dev of Listen Audiobook Player and it's still not fixed, I'm willing to put some time and effort into helping a new app shine.

Just thought I'd share to have more eyes on the app as it's sitting at 10+ downloads in the Play Store and they don't seem to do anything to promote it beyond adding every single feature known to man and hoping searches will pick up stuff like mine picked up OPDS support.


r/Calibre 1d ago

Support / How-To FFF Error 403 - Including What I've Tried

3 Upvotes

I exclusively use FFF with ao3, and have done so for about a year. Today, when I went to update the fics I have saved, I kept getting the same error: HTTP Error in FFF '403 Client Error: Forbidden for url: https://archiveofourown.org/works/[fic#]/navigate?view_adult=true'(403). This isn't ideal, so I started troubleshooting. First, checked if ao3 was up. Then, checked that I wasn't timed out on my default browser which FFF operates through. Both seemed fine. Then, I checked my INI snippet. I hadn't changed anything, but I first messed with things I knew were prone to cause errors (see, use_archiveofourown.gay and slow_down_sleep_time). Toggling the first and raising the second didn't do anything. Next, I checked my username and password were correct. They were. Then I tried changing my default browser, and no difference. I also tried grabbing the links from the books and pasting them in as if I was adding new books, and still nothing. I also tried adding new books, same error. I tried removing my two blocked fics, and that didn't do anything.

One last note, if I enable opening the fic in browser, it still doesn't open in my browser. Thought I'd mention, but I don't usually open it in my browser.

Following is my personal.ini

[defaults] is_adult:true
connect_timeout:15.0
[epub]
make_firstimage_cover: false
convert_images_to: png
remove_transparency: false
[archiveofourown.org]
username:XXXXXXXX
password:XXXXXXXX
is_adult:true
use_workskin:true
slow_down_sleep_time:7
include_in_genre: ao3categories
## use_archiveofourown_gay:true
include_subject_tags:extratags, freeformtags, freefromtags

So does anyone else know how to fix this?


r/Calibre 1d ago

Support / How-To Jon Krakauer

1 Upvotes

There are a few books by Jon Krakauer that were in my Calibre library and on my computer. They have disappeared from both and can't be added to Calibre again after redownloading. Calibre says there are no ebook formats available. iBooks opens them with no problem. Am I doing something wrong?


r/Calibre 1d ago

Support / How-To On AO3, does FanFicFare automatically look for updates? If so, how? Through “bookmarked” or “subscribed”?

4 Upvotes

Still trying to organize my collection. I have all of my fics in AO3 bookmarked, but only some subscribed. Will this be an issue for future updates?

Also, thank you all for being sooo helpful and patient! I really appreciate it!!!!


r/Calibre 1d ago

Support / How-To Glassboxx The Odyssey Screenplay ebook purchase

0 Upvotes

I purchased The Odyssey screenplay ebook through Faber and Glassboxx. On Glassboxx they say the publication date is today - July 21st - and so when click on the ebook to read it in the Glassboxx browser app it prohibits me from reading because the publication date is July 21st - again, this is today.

Why is prohibiting me from reading... on the day of release?

Someone please help me.


r/Calibre 1d ago

Support / How-To unable to update books with new chapters on kindle

1 Upvotes

hello,

i have tried searching but nothing seems to help.

i have several fan fic books i noticed have new chapters. i used the fanficfare plugin to update the files but when transferring these to my kindle they are not updated. the new chapters do not show. ive tried deleting on the kindle, deleting on the kindle via calibre, deleting the folder but that only seems to remove the file and not folder on the kindle. ive updated calibre to the latest version. can anyone help please?

i also have one that oddly seems to be permanently classified as a document, rather than a book like the others which is also driving me batty.

thank you


r/Calibre 1d ago

General Discussion / Feedback What is your workflow for reading news, articles, etc. on your ereader?

1 Upvotes

As the title says, I'm wondering how you guys smoothly add news, articles and whatever else it is you want to read (books aside) to your ereaders?

I use Calibre a bit, and there's a few sites I have set up as "Custom News Sources", which is great as I can just press a button and they automatically download and send to my Kindle.

However there are many other sites that I like that either don't have an RSS feed (many sites just don't bother to maintain them anymore as they are much less used than they used to be), or the articles are kind of all over their website, rather than in a tidy "feed".

In the that case, my workflow is pretty clunky - I go "Print - Save to PDF - email that PDF to my Kindle email", which, if you have multiple articles you want to read is just not feasible. I know you can use something like "Push to Kindle", but it has a 10 article limit per week or month, as does Any2K unless you pay for premium on both.

Ideally what I want to do is be able to click "save" on any articles I want to read, and when I'm done have them all collated into a single document and sent to my Kindle, which is pretty much what Any2K does, but I'm wondering if is any free programme that does that?

Just overall interested in your process!

Let me know. :)


r/Calibre 2d ago

Support / How-To Help removing Barnes & Noble e-book DRM without the device

5 Upvotes

I inherited a bunch of e-books from my grandmother recently that she got from Barnes & Noble. I can't read them because they have DRM, and she didn't have her e-reader anymore. I tried using DeDRM, but I couldn't get it to work.

It seemed like if I had DeDRM added then the DRM would be removed when I added the e-books into Calibre, but it wasn't. I also saw a way to remove DRM with a device ID/hash key or something like that, but I wasn't sure if that was for the device or the books, and I can't do that anyway since I don't have the device.

Happy to answer any questions. Any help would be appreciated!

Edit: Thanks so much for all the suggestions/information! I'm comfortable enough with computers that I think I could get there with the information you've given me. I'm gonna give it another shot, but if it's too annoying I'm ok with leaving it there. I'm lucky to have plenty of other things to remember her by, so these e-books aren't the end of the world. Worst case scenario I'll keep the DRM ones for the memory and get DRM free versions or a physical copy whenever I want to read one of them. Again, I really appreciate the help.


r/Calibre 2d ago

Support / How-To KoboUtilities & page numbering

Thumbnail gallery
4 Upvotes

Hi Calibre community!

For months now I’ve had the perfect setup between Calibre & Kobo. Today I tried to tinker with the page count plugins and whilst I’ve had success on the Calibre side, despite looking around online I cannot work out how to get the page count data onto the Kobo book details.

I’ve reset the metadata page for now but no matter what combinations I tried, the Kobo would just show #pages or #subtitle underneath the book names. Is anyone here able to give me an idiots guide how to get the page count onto my Kobo please?! Thank you in advance


r/Calibre 2d ago

Support / How-To Help with keeping Fandom names consistent

2 Upvotes

I have a lot of fanfic saved, and many of them are from the same fandom but use different fandom tags (I.e The Untamed (TV) and Modao Zushi and the Chinese Version of the same name, etc) and I'd like to just condense into one tag: MDZS. I've been fiddling with the personal.ini and trying to use the replace_metadata format but its just not working for me. Anyone have an example using these specific tags that I can copy?

EDIT: Just for a more robust example, here are two tags I would want to consider (MDZS)

陈情令 | The Untamed (TV), 魔道祖师 - 墨香铜臭 | Módào Zǔshī - Mòxiāng Tóngxiù

魔道祖师 - 墨香铜臭 | Módào Zǔshī - Mòxiāng Tóngxiù


r/Calibre 2d ago

Support / How-To Do books sideloaded via Calibre sync across Kindle devices?

0 Upvotes

I’m getting a second Kindle for home use and want to know if it’s possible to sync sideloaded Calibre books between devices. Ideally, I’d like my notes and reading progress to carry over. So far, the only books that sync to the Kindle app on my iPhone are the ones I’ve added using the Send to Kindle service.


r/Calibre 2d ago

Support / How-To How do you get Calibre-web to convert books?

6 Upvotes

I can't convert file types using Calibre-Web. I checked that the directories exist in the docker container but I don't see any option to convert ebooks. Am I making a dumb mistake? what should I do next? Any help would be great!


r/Calibre 2d ago

Bug DeDRM stopped working

0 Upvotes

My DeDRM plugin stopped working, and I don't understand why. I now have the following error message when trying to customize the plugin : "ImportError:attempted relative import with no known parent package".

Am I the only one?


r/Calibre 3d ago

Support / How-To Any way to download a Kindle only book?

9 Upvotes

A new author to me only publishes on Amazon/Kindle; I'm happy to purchase on Amazon, but only if I can download to my PC and Calibre. I used to dump such to an old Kindle and USB xfer such, but that loophole's been closed. Alternative?