Convert images in editor?

Phssthpok · 07-28-2025, 02:20 PM

Is there any way to convert images from one format to another (typically PNG to JPG) inside the editor?

At the moment I export, use an external tool to convert, and then re-import. Calibre has so many features that there surely must be an easier way to do it.

kovidgoyal · 07-28-2025, 10:28 PM

No, the editor doesnt have an image conversion tool, though you can just select all images, the right click and choose change filename extension. This will change all png to jpeg for example. However this only renames the images files inside the file the data will still be in PNG format. Then you can use the unpack book tool with a simple script to do the actual image data conversion.

And I vaguely recall there was an action chain solution to do this as well.

07-28-2025, 02:20 PM	#1
Phssthpok Age improves with wine. Posts: 579 Karma: 95229 Join Date: Nov 2014 Device: Kindle Oasis, Kobo Libra II	Convert images in editor? Is there any way to convert images from one format to another (typically PNG to JPG) inside the editor? At the moment I export, use an external tool to convert, and then re-import. Calibre has so many features that there surely must be an easier way to do it.

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07-28-2025, 10:28 PM	#2
kovidgoyal creator of calibre Posts: 45,382 Karma: 27756918 Join Date: Oct 2006 Location: Mumbai, India Device: Various	No, the editor doesnt have an image conversion tool, though you can just select all images, the right click and choose change filename extension. This will change all png to jpeg for example. However this only renames the images files inside the file the data will still be in PNG format. Then you can use the unpack book tool with a simple script to do the actual image data conversion. And I vaguely recall there was an action chain solution to do this as well.