Website speed test
One PageSpeed run on mobile or desktop.
Free Server and Website Tools
Quick one-off checks for websites, ports, DNS and blacklists. No signup.
https://example.org/health
Status
200
Response
312 ms
Checked
1 min ago
Pick a tool
Each tool runs one check and shows the result on the page. Use them to answer a quick question during an incident, before a migration or after a DNS change. Results are short and readable, so you can paste them into a ticket. Every tool is free, needs no account and works on public hosts only.
Website down checker
Is it down for everyone or just you?
Status
200
Response
200 ms
Checked
1 min ago
Website uptime test
Check a URL from up to six locations.
Recent checks
Blacklist checker
Look up an IPv4 address on six DNSBLs.
SpamhausSpamCopBarracuda
Port checker
Test whether one TCP port answers.
- TCP :22open
- TCP :443open
- TCP :3306closed
DNS lookup
Read A, AAAA, MX, TXT, NS, CNAME and SOA records.
AAAAAMXTXT
Need it every minute?
These tools answer once. CloudStats features keep watching. HTTP(S) checks for status, keyword and response time, plus ping, TCP port and SSL expiry checks, run as often as every 60 seconds from multiple locations. The one-command Linux agent adds six host charts with history. Set a threshold with a duration, then send alerts by email, to Discord or to a webhook. The Free plan costs $0 and includes unlimited servers, 24-hour metric retention, email alerts and community support.
- As often as every 60 seconds
- Multiple locations
- Email, Discord or webhook
Host reportingOnline
In detail
Which tool do I need?
A site feels slow
Run the website speed test. It shows a PageSpeed score, five core metrics and the biggest savings to work on first.
A site will not load
Use the down checker or the uptime test. Both ask up to six locations and show the HTTP code and response time from each.
A service does not answer
Use the port checker to test one TCP port. Open, closed and filtered results point to the service, the host or a firewall.
Mail or records look wrong
Use DNS lookup to read records, then the blacklist checker to see whether an IPv4 address appears on six DNS blacklists.