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KevinH · 03-07-2026, 07:32 AM

Again, if you need custom import of non-well formed html, using a plugin is the way to go in Sigil. Importing not well formed code into an existing epub is generally not a good idea, especially those containing large javascripts directly in a script tag.

It is relatively trivial to create a plugin to strip out script tags in the head from html using regex. You could easily multi-select as many files to process at the same time and import them simultaneously. It would be a good first project for learning how to create plugins.

Happy to provide hints if you get stuck. Otherwise as you said, you can use calibre.

03-07-2026, 07:32 AM	#25
KevinH Sigil Developer Posts: 9,419 Karma: 6733754 Join Date: Nov 2009 Device: many	Again, if you need custom import of non-well formed html, using a plugin is the way to go in Sigil. Importing not well formed code into an existing epub is generally not a good idea, especially those containing large javascripts directly in a script tag. It is relatively trivial to create a plugin to strip out script tags in the head from html using regex. You could easily multi-select as many files to process at the same time and import them simultaneously. It would be a good first project for learning how to create plugins. Happy to provide hints if you get stuck. Otherwise as you said, you can use calibre. Last edited by KevinH; 03-07-2026 at 10:59 AM.