Website Performance Tester
Enter a URL to measure its performance. The tool breaks down the request into DNS lookup, TCP connection, SSL handshake, Time to First Byte (TTFB), and content download phases. See exactly where time is spent. Useful for identifying bottlenecks and monitoring page speed.
What this tool checks
- DNS lookup time
- TCP connection time
- SSL/TLS handshake duration
- Time to First Byte (TTFB)
- Content download time
- Total request duration
- Redirect timing (if applicable)
Automate this with the API
Run this tool programmatically from your code. Get a free temporary API key with 200 requests — or register for unlimited access.
curl https://apixies.io/api/v1/performance?url=... \
-H "X-API-Key: YOUR_API_KEY"
Frequently asked questions
What is TTFB and why does it matter?
Time to First Byte measures how long it takes for the server to send the first byte of the response after receiving the request. A high TTFB (over 600ms) usually indicates server-side performance issues — slow database queries, lack of caching, or overloaded servers.
Why are my results different from Google PageSpeed?
This tool measures raw HTTP request timing from our server. Google PageSpeed measures full page rendering from a browser, including JavaScript execution, image loading, and layout shifts. They measure different things.
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