WebCheckWhen your site goes down,
you should be the first to know.
Paste a URL and start monitoring in 30 seconds. Unreachable, certificate expiring, page errors, price or version changes, a sudden traffic drop — we're watching and we alert you when something breaks.
No credit card · checks as fast as 1 minute · email / DingTalk / webhook / browser push
No monitoring skills needed.
Just a URL.
Everything else — name, certificate check, check frequency, where alerts go — we decide for you, and every decision is written on the result page, editable anytime.
Paste URL
There's just one input box. A bare domain works too — we add the scheme and read the page title as the site name.
We're watching
A visit every few minutes checks status code, content, certificate, and response time; on failure, another region confirms first.
14:37:02 200 248ms
14:42:03 timeout → confirming multi-region…
Alerts when things break
Email, DingTalk, webhook, or browser push. One incident sends one down alert + one recovery — never a mail every minute.
unreachable 3 times in a row · lasting 6 min
— you'll be notified again when it recovers
More than just "it loads".
Most "broken sites" still return HTTP 200: a database error printed on the page, a certificate expiring tomorrow, a wrongly edited price, a script 404 leaving a blank page, a silent JS exception. We watch all of it.
Uptime and response time
Status code, keyword checks, blank-page detection, slow-response threshold. Every 1–10 minutes; consecutive failures required before calling it an incident.
Page error detection
HTTP 200 but the page is a PHP error page? WordPress can't reach its database? A framework exception page? We recognize 15 classes of server-side errors and show you the actual text.
HTTPS certificate
Staged reminders 30 / 7 / 3 / 1 days before expiry; handshake failures and expired certificates alert immediately.
Content watch
Watch a price, version number, stock status, or any text on a page — get notified when it changes. Say "watch the price" and AI locates it for you.
Real-browser check
Page 200, resources 200, but the JS throws, an API 500s, CORS blocks a critical script — you only know by really opening it. A platform Chromium node does it for you once a day.
Multi-region speed test and DNS check
Measure each segment's response time from multiple vantage points to find which region is slow and where; verify public DNS resolution matches the IP actually connected.
Resource check
Whether the scripts, styles, and images a page references actually load, and any mixed content — the 404s you'd see in a browser console, without opening a browser.
Notifications on every device
Email, DingTalk, webhook, plus browser push — no app needed; alerts land right in your phone and desktop notification centers. Route by severity and time of day.
Team and on-call
Members come in owner / member / read-only roles; an on-call rotation decides who gets this week's alerts; a public status page for clients or the office wall screen.
People managing hundreds of sites
need more than "is it down?".
Traffic, snapshots, server inventory, business metrics — everything you'll worry about once your site fleet is running, in the same console.
Traffic analytics
A <3KB script: visitors, pageviews, currently online, referrers, UTM, search terms, 404s, time on page. No cookies, no raw IP storage; visitor IDs rotate daily.
Learn more →Page snapshot evidence
A real browser captures a full-page screenshot and the rendered DOM; per-file hashes + platform signature + public timestamp. A competitor's price, a promise on someone's page, how things looked before the edit — keep a verifiable record.
Learn more →Server inventory
Sites are grouped under the server their IP actually points to. Register the provider and expiry date; renewal reminders 30 / 14 / 7 / 3 / 1 days ahead; when a whole machine has an incident, its alerts merge into one.
Learn more →Stability
All sites ranked by uptime, with incident-cause breakdown and incident-duration archive. Postmortems, monthly reports, and disputes with your provider — all documented.
Learn more →Site tools
Baidu index count, PC authority weight, ranked keyword count — third-party business-data APIs, tracked as trends. Billed per query against your quota; every plan includes a monthly allowance.
Learn more →Bulk import and groups
One spreadsheet imports hundreds of sites; groups keep them organized; Trash catches mistakes. The order problems that come with scale were thought through from day one.
Learn more →The biggest risk of a monitoring tool
is that it can't be trusted itself.
False alerts make people mute notifications; missed alerts mean learning about it from customer complaints. Every rule in WebCheck was paid for by a real incident.
Alert only on consecutive failures
A single timeout is not an incident. Three consecutive failures by default — network flapping won't wake you at midnight.
Multi-region second confirmation
After the monitoring machine calls a failure, another vantage point tries once more — it can tell whether the site is really down or the monitoring machine's own network has a problem
Own-incident circuit breaker
When the monitoring uplink dies, every site "fails at once". We recognize this pattern and send one system notice — not hundreds of false alerts.
One incident, one down alert + one recovery
Never repeats every minute. A site that keeps flapping is folded into the daily digest instead of a constant disturbance.
Gentle on your server
Sites on the same server are rate-limited and staggered. We once got ourselves blacklisted by a firewall for checking too fast — so now we don't.
Tenant data isolation
Every query carries a tenant condition, and automated tests hit every ID-taking route as another tenant to prove it can only get a 404.
Use it for 90 days, then decide.
No credit card for the trial. When it ends, site checks stop but your configuration and history are kept.
Trial
Full features, use first, decide later. No credit card.
- 10 sites · 5 content watches
- Checks as fast as 10 minutes
- Built-in vantage points (Hong Kong / mainland)
- Email / DingTalk / webhook / browser push
- 2 members · traffic analytics · snapshot evidence
- 100 tool quota credits per month
Basic
Solo site owners and small teams.
- 50 sites · 20 content watches
- Checks as fast as 5 minutes
- Built-in vantage points + 1 self-hosted node
- Email / DingTalk / webhook / browser push
- 5 members · status page · traffic analytics
- 300 tool quota credits per month
Pro
Ops teams and maintenance providers.
- 200 sites · 100 content watches
- Checks as fast as 2 minutes
- Built-in vantage points + 3 self-hosted nodes · multi-region speed test
- Every channel · on-call rotation
- 20 members · status page · traffic analytics
- 1500 tool quota credits per month
Hundreds of sites? Team ¥199/mo: 500 sites, 1-minute checks, 10 nodes. Full comparison on the pricing page.
You might ask
How is this different from writing a curl script myself?
Will there be false alarms?
Will the checks put load on my server?
Can you run monitoring on my sites in mainland China / overseas?
Where is the data stored, and is it safe?
What happens to my data when the trial ends?
Next time your site breaks,
let the alert reach you before your customers do.
90-day free trial, no credit card. Paste a URL and start today.