Free tool
Is My Website Down?
Check if your website is down or if it's just you. Enter your URL below for an instant status check. But here's the thing most tools won't tell you: your site can return a 200 OK and still be completely broken for visitors — missing scripts, broken styles, failed third-party integrations. We'll show you what to look for.
- Instant check — results in seconds
- See what uptime monitors miss
- Completely free, no signup required
Free website checker
Check any URL right now
11
Detection rules
Free
No signup needed
Instant
Results in seconds
The hidden problem
Your site says "200 OK" — but users see this
Broken JavaScript
CriticalA deploy changed the bundle filename. The server responds 200, the HTML loads, but the JS that powers your app is a 404. Forms don't submit. Buttons don't work. Checkout is dead.
Missing stylesheets
CriticalYour CSS file returns a 404 or has a MIME type mismatch. The page loads — with zero styling. Everything is raw HTML. The server still says "200 OK."
Stale CDN cache
ModerateYour CDN is serving an outdated, broken version of a critical file. The origin server is fine. The CDN edge isn't. Users in some regions get a broken site.
Third-party script failure
ModerateYour payment processor, analytics, or chat widget script failed to load from their CDN. Your page loads faster (less blocking!). Your checkout doesn't work.
Broken images
LowYour image CDN is down or returning errors. Product photos, hero banners, and logos show broken placeholders. The page is "up" but looks abandoned.
Redirect loops
CriticalA misconfigured redirect sends visitors in a loop. The homepage works fine — but your pricing page, signup page, or blog is stuck in an infinite redirect.
Beyond uptime
How Sitewatch checks if your site actually works
We fetch the page
Sitewatch makes a real HTTP request to your page, just like a visitor's browser would. We check the response status, timing, and headers.
We parse every asset
We parse the HTML and find every linked resource — JavaScript, CSS, images, fonts, and third-party scripts. Then we validate each one individually.
We fingerprint the page
SHA-256 fingerprinting detects when page content changes unexpectedly. If someone tampers with your site or a deploy changes content, you'll know.
We alert on real issues
When an asset fails — broken bundle, MIME mismatch, missing stylesheet — you get an alert with root cause diagnosis and stack-specific fix steps.
The difference
"Is it down?" vs "Is it working?"
| Feature | Typical uptime checker | Sitewatch |
|---|---|---|
| What it checks | HTTP status code | Full page + every linked asset |
| Broken JS detection | No | Yes |
| CSS validation | No | Yes |
| MIME type checks | No | Yes |
| CDN content validation | No | SHA-256 fingerprint |
| Root cause diagnosis | No | Automatic classification |
| Fix guidance | No | Stack-specific playbooks |
| Price | Free | Free (1 site) |
What it checks
Broken JS detection
CSS validation
MIME type checks
CDN content validation
Root cause diagnosis
Fix guidance
Price
Frequently asked questions
Yes. The URL checker on this page is completely free with no signup required. For continuous monitoring that checks your site automatically and alerts you when things break, Sitewatch offers a free plan for 1 site.
Most people mean "can visitors access my site?" But there are two levels: your server can be down (returns an error or times out), or your server can be up while the page is broken (returns 200 OK but JavaScript, CSS, or other assets are missing). Uptime tools only check the first. Sitewatch checks both.
A 200 OK means the server responded with an HTML page. It says nothing about whether the JavaScript that powers your app loaded, whether your stylesheets rendered, or whether third-party scripts are working. This is the "up-but-broken" problem — and it's the most common type of user-facing failure.
Most "is it down" tools just ping your server and check the HTTP status. This tool does that too — but we also explain what a 200 OK doesn't tell you, and offer continuous monitoring that validates every asset on your pages.
Yes. Sitewatch offers continuous website monitoring starting with a free plan for 1 site. Unlike one-time checks, Sitewatch validates every linked asset on your pages, detects deploy regressions, and sends alerts with root cause diagnosis.
This usually means a CDN or DNS issue. Your origin server might be fine, but a CDN edge node in certain regions could be serving stale or broken content. Sitewatch Pro includes multi-region monitoring (EU + US) to catch these regional failures.
Learn more
Related resources
Website Monitoring
How Sitewatch validates every asset on your pages.
Uptime Monitoring
Beyond 200 OK — real uptime monitoring.
Free Website Monitoring
Monitor 1 site free forever.
Broken Assets Monitoring
Detect broken JS, CSS, images, and fonts.
CDN Cache Issues
Detect stale or corrupted CDN content.
Website Health Check
Proactive health audit for your site.
Stop wondering. Start monitoring.
Free plan available. Know when your site breaks — before your users tell you.