Alternatives to ByteCheck
A free online checker that measures a website's Time To First Byte. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
ByteCheck
A free online checker that measures a website's Time To First Byte.
Replacements
Listings that take over the same core job as ByteCheck.
KeyCDN Performance Test
A free web tool that measures DNS, connection, TLS and TTFB times for one URL from 10 locations.
KeyCDN Performance Test measures TTFB plus DNS, connection and TLS times from 10 global locations in one run, and promotes KeyCDN's CDN.
WebPageTest
An online website performance tester with waterfall charts, filmstrips, multiple locations and throttled connections.
WebPageTest measures full page loads with waterfalls, filmstrips and throttled connections from multiple locations, with some features on paid plans.
KeyCDN Website Speed Test
A free full-page speed test with a waterfall breakdown, run from one of 10 global locations.
KeyCDN Website Speed Test measures a full page with a per-asset waterfall from a chosen location, rather than only server response.
GTmetrix
An online page speed tester with waterfall charts, Core Web Vitals, scheduled monitoring and alerts.
GTmetrix gives full page reports with waterfalls and Core Web Vitals from 25 regions, with many options requiring an account or paid plan.
Pingdom Tools
A free online website speed test that reports load time, page size and request count.
Pingdom Tools reports full page load time, size and request count from multiple regions, rather than only time to first byte.
Similar software
Related functionality, not a direct replacement.
PageSpeed Insights
Google's free web tool that reports Core Web Vitals and Lighthouse results for any URL.
DebugBear
A web performance testing and monitoring service with a free Core Web Vitals speed test.
Uptrends Website Speed Test
A free online website speed test with waterfall reports, Core Web Vitals and filmstrip screenshots.
Is It Down Right Now
A web tool that checks whether a website is down for everyone or only for you.
GF.dev HTTP/2 Compatibility Check
A free web tool that checks whether a server negotiates HTTP/2 via ALPN.