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Sub-Forums : Calibre

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Conversion

Learn about calibre's conversion features and find help when conversion goes wrong

Conversion issue due to the...

by Nookil

Today 04:55 AM

5,854

35,726

Devices

Troubleshoot connection issues specific to your device, and learn how to make the most of calibre's device integration features

Sending books via Email via...

by dunhill

03-01-2026 11:04 PM

4,502

30,989

Editor

Learn about calibre's Edit Book feature, capable of directly editing ePub and AZW3 formats and find help when problems with editing arise

Detect red underline spelling...

by reinsley

Yesterday 06:38 AM

1,881

15,205

Library Management

All about viewing, adding, and exporting books; managing metadata; using templates; creating catalogs and understanding the calibre directory structure

Question of tristate boolean...

by ownedbycats

Yesterday 01:30 AM

10,557

71,313

Plugins

Use plugins to extend the functionality of calibre

[Conversion Output] KFX Output

by jhowell

Today 08:47 AM

967

73,921

Recipes

Post your calibre news download recipes, solutions and requests

Wired Daily edition not...

by mr316

02-25-2026 02:49 PM

4,010

20,018

Server

This is the place for all your questions about the calibre server feature.

Trashedmy format template for...

by kovidgoyal

03-02-2026 09:35 AM

672

3,532

Viewer

This is the place for all your questions about the calibre Viewer

Viewer slow first read and...

by Fleabus

03-01-2026 03:35 PM

604

4,217

Related Tools

Third party applications that integrate, or are used in conjunction, with calibre; servers, cloud, network, backup and others

BookSync-a web page to access...

by slm

03-01-2026 08:34 PM

484

7,394

Development

All about hacking on calibre. Discuss calibre's internal structures and API

Cal9 Portable From Source -...

by JimmXinu

02-23-2026 11:33 AM

1,068

8,046

Page 5 of 808

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Threads in Forum : Calibre

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Rating Thread / Thread Starter	Last Post	Replies	Views
Updates that require a computer restart vs not required JohnnyBook (12-06-2025)	12-07-2025 03:18 PM by JohnnyBook	5	2,124
Calibre taking 30+ minutes to start with 20K book library ( 1 2 3 4) Luna (11-23-2025)	12-06-2025 12:18 PM by Luna	52	9,000
New AI feature: What book to read next Leonatus (12-05-2025)	12-06-2025 11:11 AM by Leonatus	14	3,491
[Solved] Can't upgrade calibre shuvashish76 (12-06-2025)	12-06-2025 04:08 AM by shuvashish76	1	3,187
Calibre-AI with Ollama: TypeError:can only concatenate str (not "list") to str m.s (12-05-2025)	12-06-2025 03:21 AM by m.s	2	1,818
attribute 'underlying_book_id dunhill (12-03-2025)	12-03-2025 12:34 PM by dunhill	2	1,753
Calibre 3.48 & Kobo Libra Color Fortcon (12-01-2025)	12-01-2025 03:32 AM by DNSB	1	1,448
Bulk edit SVG ElMiko (11-30-2025)	11-30-2025 03:28 PM by BetterRed	3	2,061
Can't Launch Calibre Lewis_Mcc94 (11-06-2025)	11-29-2025 11:28 PM by BetterRed	6	3,125
Calibre doesn't close immediately ( 1 2) JollyRoger (11-26-2025)	11-26-2025 07:15 PM by JollyRoger	18	3,348
Can't launch unless I do as administrator ( 1 2) adriane7 (11-21-2025)	11-24-2025 07:24 AM by JSWolf	21	3,173
Can't launch Calibre adriane7 (11-20-2025)	11-23-2025 03:43 PM by theducks	4	2,015
Ver 8.15 - Comments Change case menu has dissapeared BetterRed (11-22-2025)	11-22-2025 10:59 PM by kovidgoyal	1	1,078
Similar Books mezme (11-22-2025)	11-22-2025 04:41 PM by theducks	1	1,176
Cannot Access CBR or CBZ Files Because of File Being Used by Another Process ( 1 2 3) calibreian (06-20-2025)	11-20-2025 10:37 PM by Jaws	31	34,889
recovering a very large Calibre library after system crash ( 1 2) lucask (11-18-2025)	11-20-2025 02:59 PM by JSWolf	21	3,322
first collumn Koosr1946 (11-20-2025)	11-20-2025 11:27 AM by Koosr1946	2	1,120
Author Sort ( 1 2) JeffGeorge (11-17-2025)	11-19-2025 02:32 AM by Terisa de morgan	26	3,361
Question about the color (visibility) of the Author icon and the Tag icon AnnieQuinn (11-18-2025)	11-18-2025 10:18 PM by AnnieQuinn	2	861
Threading Violation Quoth (11-11-2025)	11-14-2025 06:56 AM by Quoth	6	1,774
Problem with author directory mariaclaudia (11-07-2025)	11-13-2025 10:36 AM by mariaclaudia	14	6,173
The program does not launch the interface. Frantishek (11-02-2025)	11-11-2025 02:59 PM by tnavarra	7	2,407
Added a custom column for theme Graham44 (11-04-2025)	11-09-2025 05:20 PM by Graham44	6	2,295
Calibre Library is Empty Josieb1 (11-06-2025)	11-06-2025 02:16 PM by Josieb1	2	1,221
Ask about Content Server feature AnnieQuinn (11-05-2025)	11-05-2025 11:50 PM by AnnieQuinn	2	1,331