You have more themes installed than you need. Like inactive plugins, unused themes contain code on your server that could be exploited if a vulnerability is found.

Why This Matters

WordPress only uses one theme at a time. Extra themes:

  • Contain exploitable PHP files accessible even when inactive
  • Could have security vulnerabilities that you won't notice or update
  • Take up disk space (themes are typically 5–20MB each)
  • Clutter your Appearance panel

How to Fix It

Safe Practice: Before making any technical changes, ensure you have a full backup of your site (files and database) via your hosting control panel or a dedicated plugin like UpdraftPlus.

What to Keep

  • Your active theme (obviously)
  • One default WordPress theme (like Twenty Twenty-Four) as a fallback
  • Your active theme's parent theme if you're using a child theme

What to Delete

Everything else.

  1. Go to Appearance → Themes
  2. Click on each theme you want to remove
  3. Click Delete in the bottom-right of the theme details popup
  4. Confirm deletion

What to Watch For

  • Never delete your active theme's parent. If you're running a child theme of Astra, both themes must stay installed.
  • WordPress needs at least one fallback theme. If your active theme has a fatal error, WordPress automatically switches to the latest default theme. Keep Twenty Twenty-Four (or similar) installed as a safety net.
  • Before deleting any premium theme, download a backup zip from your theme provider's account.