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Incorrect encoding when exporting to pdf #5484
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Originally created by @ishaulov on GitHub (Nov 7, 2025).
Attempted Debugging
Searched GitHub Issues
Describe the Scenario
Hi! When exporting a document in PDF format, the encoding of the headings breaks: in Cyrillic, I see "?????" instead.
I searched for a solution on Github, but couldn't find one. Please, help me: what's wrong and what can be fixed?
Exact BookStack Version
BookStack v25.07
Log Content
Hosting Environment
Ubuntu 22.04,
PHP 8.3.19,
~# locale
LANG=ru_RU.UTF-8
LANGUAGE=
LC_CTYPE="ru_RU.UTF-8"
LC_NUMERIC="ru_RU.UTF-8"
LC_TIME="ru_RU.UTF-8"
LC_COLLATE="ru_RU.UTF-8"
LC_MONETARY="ru_RU.UTF-8"
LC_MESSAGES="ru_RU.UTF-8"
LC_PAPER="ru_RU.UTF-8"
LC_NAME="ru_RU.UTF-8"
LC_ADDRESS="ru_RU.UTF-8"
LC_TELEPHONE="ru_RU.UTF-8"
LC_MEASUREMENT="ru_RU.UTF-8"
LC_IDENTIFICATION="ru_RU.UTF-8"
LC_ALL=
@shmbatom commented on GitHub (Nov 11, 2025):
I met this truoble too, but I don't know how to solve it.
@zhang-nianqiang commented on GitHub (Nov 11, 2025):
BookStack uses dompdf as the PDF export engine.
You can find a solution at https://github.com/dompdf/dompdf?tab=readme-ov-file#about-fonts--character-encoding.
@shmbatom commented on GitHub (Nov 11, 2025):
To zhang-nianqiang
You should give detail link, and we all know that bookStack uses dompdf as the PDF export engine.
What you given is unuseful.
@Ozilly commented on GitHub (Nov 30, 2025):
Switching to WKHTMLTOPDF helped me