Child Theme
A child theme is a safe layer on top of your main WordPress theme where customizations live. It lets you change how your site looks without those changes getting wiped out the next time the main theme updates.
Also known as: child themes
In plain English
When you customize a WordPress theme — tweaking the layout, spacing, or styling — those changes are made inside the theme's files. The problem: when that theme releases an update, it can overwrite your changes and undo your work. A child theme solves this by keeping your customizations in a separate layer that sits on top of the main theme, so updates can't erase them.
Why it matters for your business
If a site was customized directly instead of through a child theme, a routine theme update can suddenly revert the look to its default — a nasty, confusing surprise. A child theme means you get the best of both: the security and bug fixes from updating your theme, and the custom design work that makes your site yours.
When it comes up
Any time real customization is done to a theme, it should be done in a child theme. If you've ever had design changes mysteriously disappear after an update, a missing child theme is usually why.
Common questions
- How do I know if my site uses a child theme?
- It shows in your WordPress settings — the active theme will be named something like 'YourTheme Child.' If you're not sure and custom design work has been done, it's worth checking before the next theme update.
- What if my theme was customized without a child theme?
- Your changes are at risk — the next theme update can overwrite them and revert your design. The fix is to move those customizations into a child theme so future updates can't touch them.
Related terms
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