Free Website Speed Test - TTFB, Page Size & Performance Check
Run a free website speed test to measure TTFB, total load time, page size, compression, HTTP version, and redirect chain. Get an A-F performance grade and actionable optimization tips.
Last updated: May 2026
Website Speed Tester
Enter a full URL including https://
FreetoolsWebsiteSpeedTester.tool.measureLabel:
- Time to First Byte (TTFB)
- Total download time
- Page size & compression
- HTTP version & redirects
- A-F performance grade
Speed Test Results
Your speed test results will appear here
Enter a URL and click Run Speed Test
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Why Website Speed Matters
A website speed test is an online tool that measures how fast a webpage responds and loads when a user requests it. The test connects to the target URL, records the time it takes for the server to send the first byte (TTFB), measures the total download time and payload size, inspects whether the server is using compression and a modern HTTP protocol, and counts how many redirects sit between the original URL and the final destination. The result is a snapshot of your site's server-side performance. Our test focuses on the metrics that infrastructure owners can directly fix: hosting speed, compression, caching, HTTP/2, and redirect chains. For a complete picture of user experience including Core Web Vitals (Largest Contentful Paint, Cumulative Layout Shift, Interaction to Next Paint), pair our test with a browser-based audit like Lighthouse. According to Google, 53% of mobile users abandon sites that take longer than 3 seconds to load, so regular website speed testing is essential for protecting traffic, conversions, and search rankings.
Why Website Speed Matters
Page speed is one of the few optimizations that simultaneously improves SEO, conversions, and user satisfaction.
1. Mobile Abandonment
Google found that 53% of mobile users abandon sites that take longer than 3 seconds to load.
53% of mobile users abandon sites slower than 3s (Google)
2. Conversion Loss
Akamai's research shows that a 1-second delay in page load time reduces conversions by 7%.
1s delay = 7% drop in conversions (Akamai)
3. SEO Rankings
Google uses Core Web Vitals as an explicit ranking signal.
Core Web Vitals are a Google ranking factor since 2021
What We Measure vs Full Lighthouse Audits
Honest disclaimer: our tool focuses on server-side performance. For a complete user-experience audit, combine it with Lighthouse.
- Time to First Byte (TTFB)
- Total download time
- Initial HTML payload size
- Compression detection (gzip / Brotli)
- HTTP protocol version
- Redirect chain length
- Server & Cache-Control headers
- Instant results (no Chrome instance)
- Largest Contentful Paint (LCP)
- Cumulative Layout Shift (CLS)
- Interaction to Next Paint (INP)
- First Contentful Paint (FCP)
- JavaScript execution time
- Accessibility & best-practice audits
- Image and font optimization checks
- Field data from real users (CrUX)
Honest Disclaimer
Our tool is a server-side performance check, not a full browser audit. It cannot measure how the page renders, how interactive it feels, or how it scores on Core Web Vitals. Think of our test as a fast diagnostic for infrastructure issues. Once you fix the problems we identify (slow TTFB, missing compression, HTTP/1.1, excessive redirects), run a full Lighthouse audit to validate user-facing metrics.
Speed Optimization Tips
Five high-impact improvements that almost always move the needle on website speed.
1. Enable Compression
Turn on gzip or Brotli compression at the server or CDN level. Brotli typically delivers 15-25% smaller files than gzip and is supported by all modern browsers. This single change can shrink HTML, CSS, and JavaScript by 60-80% with zero code changes.
2. Use a CDN
A Content Delivery Network caches your content at edge locations close to your users, slashing TTFB and download time. Cloudflare, Fastly, and Vercel Edge Network all offer generous free tiers. Expect TTFB reductions of 50-80% in distant regions.
3. Optimize Images
Images are usually the largest assets on a page. Convert JPEG/PNG to WebP or AVIF for 30-50% smaller files at equal quality, serve responsive sizes with srcset, and lazy-load images below the fold using the native loading="lazy" attribute.
4. Upgrade to HTTP/2 or HTTP/3
HTTP/2 multiplexes multiple requests over a single connection and compresses headers, while HTTP/3 (QUIC) eliminates head-of-line blocking entirely. Most modern hosts and CDNs enable these protocols with a single toggle, delivering 10-30% faster page loads on multi-resource pages.
5. Set Cache-Control Headers
Add long-lived Cache-Control headers (max-age=31536000, immutable) for static assets so returning visitors load your site instantly from their browser cache. Use shorter TTLs and stale-while-revalidate for dynamic HTML to keep content fresh without paying the latency cost.
6. Eliminate Redirect Chains
Each redirect adds 100-500ms of latency. Audit your internal links to point directly to the final URL, consolidate HTTP-to-HTTPS and www-to-apex redirects into a single hop, and use HSTS to skip the HTTP step entirely for repeat visitors.
How Our Website Speed Test Works
Five steps from URL submission to actionable performance grade.
Redirect Chain Discovery
We send HEAD requests and follow each Location header manually, counting every redirect between your input URL and the final destination. Long chains directly hurt TTFB and waste user bandwidth.
TTFB Measurement
We issue a GET request and record the elapsed time until the response headers are returned. This captures DNS lookup, TCP handshake, TLS negotiation, and server processing time in a single number.
Payload & Compression Analysis
We stream the full response body, measure its byte size, and inspect the Content-Encoding header to determine whether your server is delivering gzip, Brotli, or uncompressed content.
Header & Protocol Inspection
We read the Server, Cache-Control, and Content-Type response headers and report the HTTP protocol version, surfacing infrastructure choices that impact every visitor.
Grade & Recommendations
We combine TTFB, page size, and compression into a single A-F grade and generate a prioritized list of fixes based on what we observed during the test.
Frequently Asked Questions
Yes, the UseClick website speed test is completely free with no signup, no account creation, and no usage limits.
Our website speed test measures server-side performance. Lighthouse measures client-side Core Web Vitals.
Time to First Byte (TTFB) measures how long it takes for the first byte of the response to arrive.
Page size is the total number of bytes downloaded and is one of the biggest predictors of load time.
Google uses page speed as a ranking signal. Slow sites lose visibility in search results.
Our test sends a single GET request and does not load JavaScript or fire analytics events.
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