Turn titles into clean URL slugs with Arabic transliteration, diacritic removal, stop words and a length limit
Page Speed Checker
A PageSpeed Insights check with your own API key: performance score, lab (Lighthouse) and field (CrUX) data for LCP, INP and CLS against the official thresholds, and mobile versus desktop.
Workspace
Recent measurements
How the result is calculated
The URL is sent to pagespeedonline.googleapis.com/v5/runPagespeed with your key and the performance category. The result is split into lab data (a single Lighthouse simulation: LCP, CLS, TBT, FCP, Speed Index) and field data (CrUX: real users, 75th percentile) from loadingExperience. Official thresholds: LCP good ≤ 2.5 s and poor > 4 s, INP ≤ 200 ms / > 500 (INP replaced FID in March 2024), CLS ≤ 0.1 / > 0.25, FCP ≤ 1.8 s / > 3, TTFB ≤ 800 / > 1800 ms. Performance score: 90+ good, 50–89 needs improvement, below 50 poor. The history (last 30 measurements) is stored in your browser only.
Limits:
You need your own API key (free from Google Cloud; without one Google replies with a 429 quota error, as I tested). I could not test the tool with a real key, so the response shape the code parses is based on the API documentation and on test data I constructed — tell me about any field that differs. Field data is unavailable for low-traffic pages. Lab measurements vary from run to run. INP is not measured in the lab (field only). We do not store the key; restrict it by referrer in Google Cloud because the page runs in your browser.
FAQ
Where do I get the key?
From Google Cloud Console: enable the PageSpeed Insights API, create a key and restrict it to your site’s referrer.
Why do field and lab differ?
Lab is a single simulation and field is real users over 28 days; Google relies on the field data.
