If this tool helped you, you can buy us a coffee ☕
Measure your server's Time to First Byte (TTFB) to help developers optimize website performance and SEO rankings.
Enter the website URL to test, press Enter or click test button
TTFB (Time to First Byte) is the time from sending a request to receiving the first byte of response from the server. It's an important metric for measuring server response speed and directly affects website loading speed and user experience.
Enter a website URL and click test to see TTFB results
MAC Address Vendor Lookup
Enter a MAC address to instantly identify the device manufacturer and detailed physical address. Perfect for network management and security auditing.
Download Link Converter
Convert HTTP/HTTPS file URLs into dedicated download links for Thunder, FlashGet, and QQ Xuanfeng to use with various download clients.
IPv4 / IPv6 Address Converter
A two-way IPv4 and IPv6 address converter for network configuration, debugging, and format validation.
Random MAC Address Generator
Bulk generate random MAC addresses online with uppercase or lowercase formatting. Ideal for network testing and development.
MAC Address Vendor Lookup
Enter a MAC address to instantly identify the device manufacturer and detailed physical address. Perfect for network management and security auditing.
Download Link Converter
Convert HTTP/HTTPS file URLs into dedicated download links for Thunder, FlashGet, and QQ Xuanfeng to use with various download clients.
IPv4 / IPv6 Address Converter
A two-way IPv4 and IPv6 address converter for network configuration, debugging, and format validation.
Random MAC Address Generator
Bulk generate random MAC addresses online with uppercase or lowercase formatting. Ideal for network testing and development.
Random User Agent Generator
Generate random browser User-Agent strings for developers, QA testers, and web scrapers to simulate various devices and platforms.
When a user visits a website, the server's response speed directly impacts the page load experience and SEO performance. TTFB (Time to First Byte) is the time elapsed from when a browser initiates a request to when it receives the first byte of data from the server, measured in milliseconds (ms). This tool sends an HTTP request to the target URL to accurately measure DNS resolution, TCP connection, SSL handshake, and server processing times, ultimately generating a comprehensive TTFB performance report.
What is a good TTFB?
An ideal TTFB should be under 200ms. If it exceeds 500ms, you need to optimize your server configuration or network routing.
What time dimensions are included in the test results?
In addition to the core TTFB metric, the results display DNS lookup time, TCP connection time, SSL/TLS handshake time, and overall transmission latency to help pinpoint specific performance bottlenecks.
Test results are influenced by your local network conditions and real-time server load. We recommend running the test multiple times and taking the average. This tool does not store the URL data entered by users, but you should avoid testing internal addresses that contain sensitive information.
For dynamic websites, we recommend using a CDN and optimizing database queries to reduce TTFB. In a typical scenario, testing the homepage of https://example.com with this tool might yield a TTFB of 150ms, with the SSL handshake accounting for 40% of the time. In this case, you should consider enabling TLS session resumption or upgrading your certificate algorithm.
