Debug Tools
What it does
Debug Tools help you prove whether Nitro is involved in a front-end problem without deactivating the plugin.
The kill switch turns off Page Cache, Minify, Delay JS, Async CSS, Smart Images, Lazy Render, Speculation, font hints, and WordPress Cleanup speed tweaks. It does not remove the Defer Video module, license, or saved settings. Turning it on also clears Page Cache, Minify cache, and Divi CSS cache.
Where to find it
Divi Engine → Nitro Settings → Debug
Settings
| Setting | Type | Default | What it does |
|---|---|---|---|
| Temporarily disable Nitro performance | Toggle | Off | Kill switch described above. Use for support, then turn it off |
| Enable Page Cache debug logging | Toggle | Off | Writes HIT/MISS/STALE, store/split, Theme Builder purges, region rebuilds, and warm jobs as JSON lines. Sensitive values are masked; HTML bodies are not stored |
| Page Cache debug logs | Viewer | — | Copy or export divi-nitro/page_cache_debug.log in uploads |
Temporarily disable all performance features
- Enable the temporary disable option.
- View the site logged out (incognito).
- If the problem disappears, Nitro settings are involved — clear caches, then re-enable features one at a time (or apply the Safe preset).
Page Cache debug logging
- Enable logging.
- Reproduce the page visit logged out.
- Open the log viewer, then copy or export for your notes or for support.
- Turn logging off when you are finished (it writes on every cached request).