Website Checker
Paste any URL and get an instant read on whether it's actually okay — uptime, broken links, SSL expiry, redirects, HTTP errors, domain expiry, SEO metadata and DNS. Free, no signup.
What this website checker covers
● WEBSITE STATUS
Is it up right now?
Confirms the site responds from an independent server and reports response time — the fastest way to tell "down for everyone" from "just my network."
● BROKEN LINK CHECKER
Dead links & 404s
Crawls up to 10 pages and tests every internal link, flagging anything that returns a 4xx or 5xx status.
● SSL CERTIFICATE CHECKER
Certificate validity & expiry
Verifies the chain is complete and valid, and counts down the days until the certificate expires. More detail on theSSL certificate checker.
● REDIRECT CHECKER
Redirect loops & HTTP → HTTPS
Catches redirect loops and confirms plain HTTP visitors land on the secure version of the site.
● HTTP STATUS CHECKER
Error codes across pages
Surfaces every crawled page returning a non-200 status — server errors, access denied, missing resources.
● DOMAIN EXPIRY CHECKER
Registration & expiry date
Looks up the domain via RDAP (the WHOIS successor) and shows how many days until it expires — the one renewal nobody notices until the whole site vanishes.
● SEO METADATA CHECKER
Title, description & noindex
Reads the homepage's title, meta description, canonical URL and Open Graph tags — and flags a stray noindex that silently tells Google to drop the site from search results.
● DNS CHECKER
A, AAAA, CNAME, NS, MX, TXT
Snapshots the domain's live DNS records, so you can confirm a migration landed where it should — and spot records that shouldn't be there.
How to use this website checker
- Paste the site's URL into the box above — a bare domain like
acme.comworks fine. - Run the check. It takes a few seconds while we sweep the homepage and its internal links.
- Read the report: a clear pass/fail per check, with the exact error or expiry date behind anything that's flagged.
- Share the report URL directly with a client — it stays live for an hour.
A checker tells you now. Monitoring tells you the moment it breaks.
This page runs the same free, one-time snapshot as our full checker tool. If you manage client sites, SitesRadar's paid plans run this sweep on a schedule and alert you the moment something breaks.
Guides for issues we check
Frequently asked questions
- What is a website checker?
- A website checker is a tool that tests whether a site is online and working correctly — usually covering uptime, SSL certificate validity, broken links, redirects, and HTTP error codes. Paste in a URL and it tells you what, if anything, is broken.
- How do I check if a website is down for everyone or just me?
- Run the site through a checker that connects from an independent server, not your own browser or network. If our checker reaches it, the site is up and the problem is local to you (DNS cache, VPN, ISP). If it can't reach it either, the site is genuinely down.
- Is a free website checker safe to use on a site I don't own?
- Yes. A well-behaved checker makes the same HTTP requests a browser would — nothing more invasive than visiting the page — and respects
robots.txt. Ours identifies itself with a clear user agent string. - What does a broken link checker actually find?
- It crawls a site's internal links and requests each one, flagging any that return a 4xx or 5xx status — the dead links visitors and Google both hit as 404s. Ours checks up to 10 pages per free run.
- What is an SSL certificate checker for?
- It confirms a site's HTTPS certificate is valid, the chain is complete, and how many days remain before it expires — the single most common cause of a browser "not secure" warning that tanks a client's trust overnight.
- Does it check when my domain expires?
- Yes. We query the public RDAP registry (the modern replacement for WHOIS) and show the exact expiry date and days remaining. Some country-code registries don't publish expiry dates; when that happens we say so instead of guessing.
- Can it check my site's SEO metadata and DNS records?
- Yes. Every run reads the homepage's title, meta description, canonical URL and Open Graph tags, flags a stray
noindexthat would drop the site from Google, and snapshots the domain's A, AAAA, CNAME, NS, MX and TXT records. - Why does the checker say my site is blocked?
- Some sites sit behind Cloudflare, AWS WAF, or similar tools that block automated requests. When that happens we say so — we confirmed the site is responding, but couldn't inspect its pages, and the score reflects only what we could determine.
- How often should I run a website check?
- A one-off run is fine for a quick sanity check before a client call or after a deploy. If you're responsible for a site staying up long-term, you want scheduled monitoring instead of remembering to check manually — that's what SitesRadar's paid plans automate.