Website Checker: Status, Speed, SEO and Security
Enter any website to see whether it is up for everyone or just for you. One check shows the HTTP status code, every redirect, the response time broken into connection, TLS and server wait, the certificate expiry, the title, description and other SEO tags, missing security headers and the DNS records, with a score out of 100.
Free · No sign-up
How to use it
- Type a domain or paste the address of a page.
- Click Check website. Our server loads the page the way a browser does.
- Read the verdict, status code and load time, and follow the redirect chain if there is one.
- Open the SEO, security, DNS and server sections for the details and fix what is marked.
Why use this tool
Down for everyone or just you?
The page is loaded from our server, so a working result means the problem is on your side.
Status codes explained
Every code from 200 to Cloudflare's 52x errors comes with a plain explanation.
Full redirect chain
See each hop, its status and time, and spot loops and HTTP to HTTPS problems.
Speed breakdown
Connection, TLS handshake, server time and download, measured separately.
SEO and security in one report
Title, description, H1, canonical, noindex, Open Graph, HTTPS, certificate days and security headers.
DNS included
A, AAAA, NS, MX and CAA records and DNSSEC from public resolvers.
Is the website down for everyone or just me?
If this checker loads the site but your browser doesn't, the problem is close to you: try another network or mobile data, clear the DNS cache, turn off a VPN or ad blocker, and check whether your company or school network blocks the site.
If the checker can't reach it either, the site is down for everyone. The error tells you where: a DNS error means the domain doesn't point anywhere, a timeout or refused connection means the server is off or overloaded, and a 5xx status means the server is running but the application on it has failed.
HTTP status codes in plain English
| Code | Meaning | What to do |
|---|---|---|
| 200 | OK | Nothing, the page works. |
| 301 / 308 | Permanent redirect | Fine for moved pages; link to the new address directly. |
| 302 / 307 | Temporary redirect | Use 301 if the move is permanent, or search engines keep the old address. |
| 403 | Forbidden | Check file permissions, firewall and bot protection rules. |
| 404 | Not found | Restore the page or redirect it to the closest match. |
| 500 | Server error | Look at the application's error log. |
| 502 / 504 | Bad gateway or timeout | The app behind the proxy crashed or is too slow. |
| 503 | Unavailable | Maintenance mode or overload; check server resources. |
What counts as a fast response
Time to first byte (TTFB) is how long the server takes to start sending the page. Google suggests keeping it under 800 ms; well-cached sites answer in under 200 ms. Long connection or TLS times usually mean the server is far away from the visitor, which a CDN fixes. A long server thinking time points to slow code, database queries or no page caching.
Each redirect adds a full round trip. An address that goes from http to https and then from the bare domain to www makes visitors wait twice before anything loads, so link straight to the final address.
Security headers worth adding
- Strict-Transport-Security: forces HTTPS on return visits.
- Content-Security-Policy: blocks injected scripts.
- X-Frame-Options or CSP frame-ancestors: prevents clickjacking.
- X-Content-Type-Options: nosniff stops MIME type guessing.
- Referrer-Policy: strict-origin-when-cross-origin is a good default.
Frequently asked questions
How do I know if a website is down?
Enter its address here. If our server gets a 2xx or 3xx status, the site is up and the problem is with your connection. A DNS error, timeout or 5xx status means it is down for everyone.
Why does a site work for me but show 403 here?
Some sites block automated visitors and data center addresses with a firewall or bot protection. The site is up for people even though it refuses our check.
What is a good time to first byte?
Under 200 ms is excellent, under 800 ms is acceptable. Above that, look at server caching, database speed and hosting location.
What does a redirect chain mean?
The address you typed sent the browser to another address, sometimes several times. Each hop slows loading, and long chains can lose search ranking, so link to the final address.
Why is my site's score low?
The score counts passed SEO, security, DNS and server checks. Missing security headers and a missing meta description are the most common reasons and are quick to fix.
Is the check private?
We only load the public page you enter, the same way a visitor would. Results are cached for a minute and not stored.
Why a website isn't loading, and how to find out
Related tools
Need something built?
Tell us what you want to create.
Tell us what you need built, from a simple website to a complete app, AI solution, automation, or custom system.