Website Speed Test

Measure website loading speed — TTFB, total load time, page size, compression, and resource count. Free website performance test with rating.

Run a check to see results

APIPOST /api/v1/web/speed
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Key Features

100% Free

No registration required, unlimited checks

Instant Results

Real-time analysis with detailed output

REST API Access

Integrate into your workflow via API

Accurate Data

Live queries to authoritative sources

What is Website Speed Test?

The website speed test measures how fast a web page loads by analyzing multiple performance metrics: Time to First Byte (TTFB — how quickly the server starts responding), total page load time, page size in bytes, number of HTTP requests (resources like images, scripts, and stylesheets), compression status (gzip/brotli), and caching header configuration. The tool provides an overall performance rating and identifies specific bottlenecks that slow down your site. Page speed is a confirmed Google ranking factor and directly impacts user experience — studies show that 53% of mobile visitors leave a page that takes longer than 3 seconds to load.

This free website speed test helps web developers identify and fix performance issues, SEO specialists measuring Core Web Vitals compliance, business owners checking if their site meets modern speed expectations, and agencies auditing client websites for optimization opportunities.

How to Use

  1. 1Enter the full URL of the page you want to test (e.g., https://example.com/page)
  2. 2Click 'Run Check' to load the page and measure all performance metrics
  3. 3Review TTFB — under 200ms is excellent, over 600ms needs server-side optimization
  4. 4Check total page size and resource count — large pages with many requests load slowly
  5. 5Verify compression is enabled (gzip or brotli) — this can reduce page size by 60-80%
  6. 6Use the performance rating to prioritize which issues to fix first

Who Uses This

System Administrators

Monitor and troubleshoot infrastructure

Developers

Debug network issues and integrate via API

SEO Specialists

Verify domain configuration and performance

Security Analysts

Audit and assess network security

Frequently Asked Questions

How do I test my website loading speed?
Enter your website URL in the speed test tool and click Run Check. The tool loads your page from our servers and measures every aspect of the loading process: server response time (TTFB), download time for all resources, total page size, number of HTTP requests, compression effectiveness, and caching configuration. Results include specific metrics and an overall performance rating. For the most accurate picture, test multiple pages — your homepage, a product page, and a blog post may perform very differently.
What is TTFB and why does it matter for SEO?
TTFB (Time to First Byte) measures the time between sending an HTTP request and receiving the first byte of the server's response. It reflects your server's processing speed — including database queries, server-side rendering, and CDN response time. Google considers TTFB as part of Core Web Vitals performance assessment. A TTFB under 200ms is excellent, 200-500ms is acceptable, and over 600ms needs attention. High TTFB is usually caused by slow database queries, unoptimized server-side code, no CDN, or overloaded hosting.
What is a good website loading speed?
Google recommends pages load within 2.5 seconds for a good user experience (measured as Largest Contentful Paint). Ideally: TTFB under 200ms, total page load under 2 seconds, page size under 2MB, and fewer than 50 HTTP requests. In practice, the average web page in 2025 is about 2.5MB with 70+ requests — so there's significant room for optimization on most sites. Faster sites consistently see lower bounce rates, higher conversion rates, and better search engine rankings.
Why is my website slow and how do I fix it?
Common causes and fixes: large unoptimized images (compress and convert to WebP), too many HTTP requests (combine files, use sprites, lazy-load below-fold content), no compression (enable gzip or brotli on your server), no CDN (serve static assets from edge servers close to users), render-blocking JavaScript and CSS (defer non-critical scripts, inline critical CSS), slow server response (upgrade hosting, optimize database queries, add server-side caching), and no browser caching (set proper Cache-Control headers for static assets).
Does website speed affect search engine rankings?
Yes — Google has confirmed page speed as a ranking factor since 2010 for desktop and 2018 for mobile. In 2021, Core Web Vitals (which include loading speed metrics) became part of the page experience ranking signal. Slow sites are directly penalized in search results, especially on mobile. Beyond rankings, faster sites have measurably better user engagement: lower bounce rates, longer session durations, and higher conversion rates. Every 100ms of improvement in page load time can increase conversions by up to 1%.

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API Endpoint

POST /api/v1/web/speed
View Documentation