Bulk Core Web Vitals Checker Tool – Analyze Up To 50 URLs Instantly

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Core Web Vitals & Lighthouse — Bulk Checker

Analyze up to 50 URLs for performance, SEO, and accessibility metrics

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Powered by Google PageSpeed Insights API • Real-time performance analysis

What is a Bulk Core Web Vitals Checker?

A Bulk Core Web Vitals Checker is a specialized SEO tool that enables website owners, developers, and SEO professionals to test multiple URLs simultaneously for Google’s performance metrics. Instead of analyzing one page at a time with PageSpeed Insights, bulk checkers allow the evaluation of hundreds or even thousands of pages in a single test.

This approach ensures a complete overview of a website’s performance, uncovering slow-loading subpages, interactive delays, or layout instabilities across the entire site. The SEO Shades Bulk Core Web Vitals Checker is engineered for speed, scalability, and accuracy, making it an ideal solution for enterprise-level websites, agencies, and digital marketers.

Why Core Web Vitals Matter for SEO in 2025 ?

Google’s Core Web Vitals are now central to ranking and user experience. They measure how quickly a page loads, how responsive it is to user input, and whether the design elements remain stable during the loading process.

Key metrics:

  • Largest Contentful Paint (LCP): Measures page loading performance.
  • First Input Delay (FID): Tracks responsiveness and interactivity.
  • Cumulative Layout Shift (CLS): Evaluates visual stability.

Why they matter:

  • Direct impact on SEO rankings.
  • Improved engagement and conversion rates.
  • Better mobile-first performance, critical for India’s diverse device and network environment.

Quick impact list:

  • Faster loading leads to reduced bounce rates.
  • Responsive interactions drive higher conversions.
  • Stable layouts build trust and improve usability.

Features of the SEO Shades Bulk Core Web Vitals Checker

Key features include:

  • Test up to 50 URLs at once.
  • Separate mobile and desktop reports.
  • Real-time performance data sourced from Lighthouse.
  • Exportable CSV/Excel reports.
  • India-specific server locations for accurate localized results.
  • Free and unlimited checks without restrictions.

How to Use the Bulk Core Web Vitals Checker

Follow these steps:

  1. Prepare URLs by copy-pasting them.
  2. Select device type (mobile or desktop).
  3. Run the analysis to generate Core Web Vitals data.
  4. Review detailed reports on LCP, FID, CLS, Speed Index, and performance scores.
  5. Export results for further reporting or offline use.

Pro Tip: Use Crawl Mode for automated discovery of URLs across your domain, or URL List Input for testing specific landing pages, product pages, or blogs.

Understanding Core Web Vitals Metrics

Largest Contentful Paint (LCP)

  • Good: ≤ 2.5s
  • Needs Improvement: 2.5–4s
  • Poor: > 4s
    Represents how quickly the main content of a page loads.

First Input Delay (FID)

  • Good: ≤ 100ms
  • Needs Improvement: 100–300ms
  • Poor: > 300ms

Measures how quickly the browser responds after a user interaction.

Cumulative Layout Shift (CLS)

  • Good: ≤ 0.1
  • Needs Improvement: 0.1–0.25
  • Poor: > 0.25
    Tracks unexpected layout shifts that harm the browsing experience.

Comparison Table

Metric

Good

Needs Improvement

Poor

LCP

≤ 2.5s

2.5–4s

> 4s

FID

≤ 100ms

100–300ms

> 300ms

CLS

≤ 0.1

0.1–0.25

> 0.25

Bulk vs Individual Core Web Vitals Checking – Which One Should You Use?

  • Bulk Checking: Best for large websites and SEO audits. Saves time and provides a broad performance overview.
  • Individual Checks: Suitable for troubleshooting and detailed optimization of high-value pages.

Choose bulk checks for scale and efficiency, while using individual tests for deep analysis.

Benefits of Using SEO Shades’ Bulk Core Web Vitals Checker

  • Localized servers for accurate test results.
  • Optimized for India’s variable internet speeds.
  • Support for multi-language websites including Hindi and regional languages.
  • Free, unlimited usage without restrictive limits.

These features make the tool highly valuable for Indian businesses and SEO professionals aiming to improve website performance.

Frequently Asked Questions

Q1. How many URLs can I test at once using the SEO Shades Bulk Core Web Vitals Checker?

You can test up to 50 URLs in a single batch.

Q2. Does your tool support checks from both mobile and desktop perspectives?

Yes, both mobile and desktop modes are available.

Q3. How often should I perform bulk Core Web Vitals testing?

Monthly testing is recommended, especially after major updates.

Q4. Can I export the test results for offline analysis?

Yes, you can export results in CSV or Excel format.

Q5. Are the results 100% comparable with Google’s PageSpeed Insights?

Yes, the tool uses the same Lighthouse data sources as PageSpeed Insights.

Q6. Is the tool free to use?

Yes, it is free with no hidden limitations.