Online performance checker

Check your website's performance metrics including load time, page size, and Core Web Vitals with this comprehensive online performance analyzer.

Request Feature / Support

12,896+

Total Calculations Run

< 15ms

Browser Execution Speed

100%

Client-Side Privacy

4.9 / 5.0

User Satisfaction

AI Web Tool Generator

Build Your Own Custom Web Calculator in Seconds

Type what tool or calculator you need below. Our AI will build it instantly for your site.

About This Tool

The Online Performance Checker is a comprehensive tool that analyzes website performance by simulating real-world conditions. Enter any URL to get detailed metrics including page load time, total page size, number of requests, and simulated Core Web Vitals scores. The tool provides actionable insights to help you optimize your website for better speed and user experience. All analysis is performed with realistic simulation algorithms that mimic actual browser behavior.

Save your calculation history with a free account

How to Use

Enter the full URL of the website you want to check (include http:// or https://)
Select which performance metrics you want to analyze (all are selected by default)
Click the 'Check Performance' button to start the analysis
View the detailed results including load time, page size, requests count, and performance scores
Use the insights to identify areas for optimization and improvement

Frequently Asked Questions

Find Quick Answers

What performance metrics does this tool check?

The tool checks multiple performance metrics including page load time (simulated), total page size, number of HTTP requests, and simulated Core Web Vitals scores (LCP, FID, CLS).

Do I need to install anything to use this tool?

No installation is required for basic use. The tool runs entirely in your browser for the simulation. For more advanced server-side analysis, the backend component requires standard PHP packages which are detailed in the development tasks.

How accurate are the performance results?

The tool provides realistic simulations based on common performance patterns. While it doesn't perform actual real-time testing against the live site (which would require external APIs), it uses sophisticated algorithms to simulate typical performance metrics based on website characteristics.

Can I check multiple URLs at once?

Currently, the tool analyzes one URL at a time to provide detailed, focused results for each website. For batch analysis, you would need to check each URL separately.

What should I do if I get poor performance scores?

If your website shows poor performance scores, consider optimizing images, minifying CSS and JavaScript files, enabling browser caching, reducing server response time, and using a content delivery network (CDN). The tool provides specific metrics to help identify which areas need improvement.

Need to run multiple calculations?

Create a free account today to unlock unlimited daily runs, access advanced parameters, save your history, and request custom features.

Related Tools

Other useful calculators and utilities you might like

Spotify to MP3 Converter

Convert Spotify tracks and playlists to MP3 format instantly with our free online converter.

Road Distance Calculator

Calculate the driving distance and travel time between two addresses with our free online road dista...

Age Calculator

Calculate your exact age in years, months, and days from any birth date to any target date.

Currency Converter

Convert currencies instantly with real-time exchange rates and historical data support.

Your Feedback Matters

Help Us to Improve