# Global Website Speed Test

> Free online tool at https://www.globalwebsitespeedtest.com that tests a web page's loading speed from 8 regions at the same time — Seoul, Tokyo, Singapore, Sydney, Virginia, Oregon, Frankfurt and London — using headless Chromium on AWS. It reports DNS, TCP, TLS, TTFB, full load time, transferred bytes and file count for a first (cold cache) and a repeat (warm cache) visit, plus an A+ to F grade and a 0–100 score. Operated by DevTeam Co., Ltd. (Incheon, Republic of Korea). No sign-up, free.

Key facts:
- Regions and AWS codes: Seoul ap-northeast-2, Tokyo ap-northeast-1, Singapore ap-southeast-1, Sydney ap-southeast-2, Virginia us-east-1, Oregon us-west-2, Frankfurt eu-central-1, London eu-west-2.
- A test takes about 20–60 seconds; all regions run in parallel.
- TTFB is measured from sending the HTML request to the first response byte (responseStart − requestStart), separately from DNS, TCP and TLS. Load time runs from navigation start to the end of the load event.
- "Origin" is the region with the lowest TTFB; "average" and "worst" are taken over the regions that succeeded.
- Grade A+ requires origin TTFB ≤ 200 ms and load ≤ 1.5 s, average TTFB ≤ 800 ms and load ≤ 2.5 s, worst TTFB ≤ 1.5 s and load ≤ 3 s, and a faster repeat visit in ≥ 80% of regions. Lower grades relax these limits; F misses the D limits.
- Score weights: average load 35%, average TTFB 25%, worst-region load 20%, origin TTFB 10%, repeat-visit improvement 10%; clamped to the letter grade's band.
- Leaderboard: opt-in only; a site qualifies with ≥ 10 files and ≥ 100 KB transferred on the first visit (median across regions) and ≥ 6 of 8 regions succeeding. Ranked by score, then average load time; top 200 shown. The board resets on the 1st of every month (UTC) and past months are archived at https://www.globalwebsitespeedtest.com/leaderboard/YYYY-MM.
- The homepage shows daily statistics (UTC): distinct sites tested, tests run, average load time, fastest and slowest test averages, average load time per region.

## Tool
- [Global website speed test](https://www.globalwebsitespeedtest.com/): run a free test from 8 regions at once.
- [Speed leaderboard](https://www.globalwebsitespeedtest.com/leaderboard): this month's fastest opted-in real websites, ranked by multi-region score (monthly reset, top 200).
- [Methodology](https://www.globalwebsitespeedtest.com/methodology): exact metric definitions, grade thresholds, score weights and leaderboard rules.

## Guides
- [How to reduce TTFB (time to first byte): causes, targets and fixes that work](https://www.globalwebsitespeedtest.com/blog/reduce-ttfb): Reduce TTFB by caching HTML at the edge, fixing slow database queries, removing redirects and moving content closer to users. Targets, causes and configs.
- [What a CDN is and how it makes your website fast worldwide](https://www.globalwebsitespeedtest.com/blog/cdn-explained): A CDN serves files and cached HTML from edge servers near each visitor. Learn cache hits, keys, TTLs, purging and headers, and how a CDN cuts far-region TTFB.
- [Image optimization for web performance: AVIF, WebP, responsive images and lazy loading](https://www.globalwebsitespeedtest.com/blog/image-optimization): Image optimization guide: pick AVIF or WebP, set quality, serve responsive images with srcset, prevent CLS, lazy-load correctly and prioritize the LCP image.
- [Cache-Control and browser caching: how to make repeat visits instant](https://www.globalwebsitespeedtest.com/blog/browser-caching): Browser caching: set Cache-Control headers by file type, use immutable and stale-while-revalidate, bust caches with content hashes and speed up repeat visits.
- [Core Web Vitals explained: how to improve LCP, INP and CLS](https://www.globalwebsitespeedtest.com/blog/core-web-vitals): Core Web Vitals explained: what LCP, INP and CLS measure, the good thresholds at the 75th percentile, and the practical fixes that move each metric to green.
- [Why your website is slow in other countries: latency, distance and fixes](https://www.globalwebsitespeedtest.com/blog/why-website-slow-in-other-countries): Your website is slow in other countries because every round trip to a distant server adds latency, and a page load needs many. Learn the physics and the fixes.
- [How to eliminate render-blocking CSS and JavaScript](https://www.globalwebsitespeedtest.com/blog/render-blocking-resources): Render-blocking CSS and JavaScript delay first paint. Learn defer vs async, critical CSS, preload, font-display and third-party fixes, with copy-paste HTML.
- [HTTP/2, HTTP/3 (QUIC) and TLS 1.3: protocol-level speedups explained](https://www.globalwebsitespeedtest.com/blog/http3-tls13): HTTP/3 over QUIC and TLS 1.3 cut connection setup from three or four round trips to one or two. Learn how they work, how to enable them and how to verify.

## Company
- [About](https://www.globalwebsitespeedtest.com/about): DevTeam Co., Ltd. (주식회사 뎁팀), Representative Daniel Ahn, Business Reg. No. 433-88-03388, 509-J492, 5F, 81, Convensia-daero, Yeonsu-gu, Incheon 21998, Republic of Korea.
- [Contact](https://www.globalwebsitespeedtest.com/contact)
- [Privacy Policy](https://www.globalwebsitespeedtest.com/privacy)
- [Terms of Service](https://www.globalwebsitespeedtest.com/terms)

Last updated: 2026-10-05