Open Appearance, Themes and identify the active design. If it is a child theme, confirm its parent from the theme details or developer documentation. The parent may look inactive in the theme list while still being essential. On Multisite, a theme can serve another site in the network, so the network administrator must review usage before removal.

1. Back up any custom theme files or local changes you may need later. A ZIP from the original vendor does not include modifications you made on the server.
2. If you want to remove the current theme, first install, test and activate a suitable replacement.
3. Open Appearance > Themes and select the unused theme's details.
4. Choose Delete where available and confirm only after checking the theme name.

Visit the homepage and pages that use special templates. Clear the relevant cache if old assets remain visible. Check that the intended theme is still active and that any child theme continues to load its parent assets.

Deleting a theme removes its files. It does not serve as a general database cleanup, and some theme options can remain stored. Avoid using a broad database cleaner just because the theme was removed; unrelated settings may share similar names.

The theme may be active, required as a parent, or protected by your current permissions. In a Multisite network, site administrators cannot manage theme files in the same way as a single-site administrator. Ask the responsible administrator to review the dependency instead of manually deleting folders.

If you removed the wrong theme, reinstall the exact trusted package and restore any custom files from backup. Check the site settings afterward, since a fresh install alone may not recover every previous design choice.

• Installing a WordPress theme from the theme directory
• Uploading and installing a WordPress theme ZIP file
• Planning and checking your WordPress backups
• Editing a block theme header safely

• Themes screen