Website Status Checker

Probe whether a URL answers and how long the first byte takes.

URL

Calculated Result

Enter a target and run

Formula: GET probe → status + TTFB sample

About this calculator

A single GET with a size cap. This is not continuous uptime monitoring.

FormulaGET probe → status + TTFB sample

Timed fetch → status, TTFB ms, sampled bytes.

Preview favicons and the Open Graph image.

Redirect chain and response headers.

Check if a domain looks free via public RDAP.

Age from the RDAP registration date.