Site Availability Checker
Check if a website is online and get basic response metrics.
Why website availability matters
A website's availability and performance are critical for user trust and search engine rankings. High response times or frequent downtime can lead to lost traffic, decreased conversions, and lower visibility. Monitoring these metrics helps ensure your digital systems remain reliable and effective for your audience.
How the Deltum Site Checker works
This tool performs a real-time HTTP HEAD request from our servers to the target URL. Unlike a full browser visit, a HEAD request only fetches the response headers, making it extremely fast and lightweight. Our system analyzes the status code, measures the latency, and inspects security-related headers like CSP, HSTS, and X-Frame-Options to provide a comprehensive technical overview of your site's configuration.
Frequently Asked Questions
It is the time it takes for the server to respond to the initial request. Lower values (under 200ms) indicate a fast, well-optimized server.
HTTPS encrypts data between the user and the server, ensuring privacy and security. It is also a significant ranking factor for SEO.
These are instructions sent by the server to the browser to protect users from common web vulnerabilities like XSS or clickjacking.
Status codes indicate the result of a request. 200 means success, 404 means the page was not found, and 500+ indicates a server-side error that needs immediate attention.
While necessary for moving content, excessive redirects can increase latency and impact SEO. It's best to have direct links to final URLs whenever possible.
Strict-Transport-Security (HSTS) tells browsers to only interact with your site using secure HTTPS connections, preventing certain types of man-in-the-middle attacks.