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Fifteenth Labs Usage Audit

A WordPress admin tool that audits every active plugin against your site's real content, so you know which ones are actually doing something before you guess wrong and break your site. Free, on WordPress.org.

Submitted — awaiting review

Every long-running WordPress site accumulates plugins nobody quite trusts to remove. Deactivating the wrong one can break a site instantly, so most site owners just don't — and the plugin count creeps up forever. Fifteenth Labs Usage Audit checks each active plugin's known shortcodes (or scans its own files for add_shortcode() calls, or falls back to its name) against post content, block-era widgets, navigation, templates, legacy widgets, options, and post meta, and ranks the result by confidence instead of guessing. Nothing here is presented as a "safe to delete" verdict — a plugin with no shortcode at all, like caching, SMTP, or security, is often the most critical one on the site, and the tool is built to say so rather than stay silent about it.

What you get

  • A one-click site-wide scan, cached for 12 hours so the admin page stays fast to load
  • Results ranked by confidence: Confirmed Used, Maybe Used, Not Found, or No Signature — never collapsed into a single yes/no
  • Coverage of block-era content (widgets, navigation, template parts) alongside legacy widgets and post meta, not just post content
  • A live Shortcode Search for spot-checking any specific shortcode by hand, no scan required
  • Page-builder matches (Elementor, BeBuilder, etc.) flagged as unverified rather than counted as confirmed — a shortcode sitting in builder data doesn't prove it renders
  • Honest "no evidence found" language instead of a "safe to deactivate" recommendation

See it in action

The editor

The audit results, grouped by confidence — Not Found and Maybe Used surfaced first since those are the ones worth a second look, Confirmed Used pushed to the bottom. Each card shows exactly where a plugin's signature turned up: which pages, which post meta, which widgets — with a direct edit link, not just a plugin name and a checkbox.

Built with

  • PHP · WordPress