Free 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.
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. Create a free account to monitor one site automatically and get email alerts when something breaks.
What this website checker covers
Website status
Is it up right now? Confirms whether the site responds from an independent server and reports response time. For a focused second opinion, use the website down checker.
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
noindexthat 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.
Guides for issues we check
Looking for a UptimeRobot alternative?
What uptime-only monitors miss, and when switching is worth it.
SitesRadar vs UptimeRobot
An honest head-to-head, including when UptimeRobot is the better buy.
Show more guides for issues we check
Fix broken links after a WordPress migration
Find the cause, repair URLs, and check the whole site.
Monitor SSL certificate expiration
Catch renewal failures before visitors see a warning.
Monitor silent website changes
Spot metadata, DNS, and homepage regressions early.
Fix a 500 Internal Server Error
Read the log, not the error page, to find the fault.
Fix a 502 Bad Gateway error
Trace it to the origin, the proxy, or the host.
Fix a 503 Service Unavailable
Overload, maintenance mode, or a dead backend.
Fix a 504 Gateway Timeout
Find which timeout in the chain is firing first.
"This site can't be reached"
Read the code and tell a DNS fault from a dead server.
Fix a 403 Forbidden error
Find the permission, rule, or firewall saying no.
Fix a 400 Bad Request
Oversized cookies, bad URLs, and rejected forms.
Fix 429 Too Many Requests
Find the rate limit and stop it blocking real visitors.
Fix a redirect loop
Break ERR_TOO_MANY_REDIRECTS at the rule that causes it.
Fix ERR_CONNECTION_REFUSED
A stopped server, a firewall, or a stale DNS record.
Fix an SSL handshake failure
Certificate, chain, protocol, or Cloudflare 525.
Recover an expired domain
What stops working, and how long you have to renew.
Stop emails going to spam
Check SPF, DKIM, DMARC, and blacklists in order.
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 problem is likely local to you. If it cannot connect either, the site may be down, though DNS, TLS, firewall rules or bot protection can also block an automated check.
- 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. Ours identifies itself with a clear user agent string, and the crawler pageexplains how to block it.
- 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. SitesRadar's free plan monitors one site and emails you when a check starts failing.