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Desktop Core Web Vitals Audit online, free
Find markup that risks poor LCP, CLS and FCP. It reads the HTML and does not measure the page; use Lighthouse Audit for measured values.
- Runs in your browser — no upload
- Free, no sign-up, no watermark
- HTML
- TXT
Set up on this page
- Device Viewport: desktop
How to use Core Web Vitals Risk Check · Core Web Vitals Risk Check — frequently asked questions
How to use Desktop Core Web Vitals Audit
- 1
Enter the page URL
Paste the address you want to check, or paste its HTML if the tool offers that mode.
- 2
Check the preset
Device Viewport is set to desktop. You can change it before running.
- 3
Run the tool
Press start. Processing happens on your device.
- 4
Read the result
The result is delivered as JSON, TXT.
What Core Web Vitals Risk Check can do
- Device Viewport: mobile and desktop
- Private by design — files are processed in your browser and never uploaded
- Free with no sign-up, no watermark and no daily limit
Core Web Vitals Risk Check — frequently asked questions
What does this page set for Desktop Core Web Vitals Audit?
Device Viewport: desktop. All of these stay editable.
Is my file uploaded?
No. On the web this tool runs in your browser, so your file is not uploaded.
Are there limits?
It takes one input per run. Server jobs accept up to 0 GB. A job can run for up to 15 seconds. In the browser, the practical limit is your device's memory.
What are Core Web Vitals?
Core Web Vitals are a set of specific real-world metrics defined by Google to measure user experience, including loading speed (LCP), visual stability (CLS), and responsiveness (INP).
What is Largest Contentful Paint (LCP)?
LCP measures perceived load speed by identifying when the main content of a webpage has likely loaded. A good LCP score is 2.5 seconds or faster.
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