Online Port Scanner
Scan any host for open TCP ports directly from the browser, no install required. Check a default list of common service ports or specify your own comma-separated list. Each result shows open or closed status with connection latency, useful for verifying firewall rules, checking if a service is actually listening, or auditing your own infrastructure.
Proxy Checker
Paste your proxy list and get instant health diagnostics, geo info, and anonymity detection.
| Status | Proxy | Protocol | Exit IP | Country | Type | ASN | ISP | Latency | Flags |
|---|
Target URL Proxy Check NEW
Test proxies against a specific target URL. Find out which ones actually work for scraping your target, not just which ones are alive. Detects WAF blocks (Cloudflare, DataDome, Akamai, Imperva, PerimeterX) and CAPTCHAs.
| Status | Proxy | Protocol | HTTP | Latency | Block Reason |
|---|
Port Scanner
Scan any host for open ports. Checks 22 common service ports by default, or specify your own.
| Port | Status | Service | Latency |
|---|
Ping
Measure round-trip latency to any host. Returns min/avg/max and packet loss percentage.
My IP
See your public IP address, location, ISP, and whether you're detected as a proxy or datacenter.
IP Lookup
Look up geolocation, ISP, and metadata for any IP address.
Scrape Audit
Paste any URL to detect bot protection, CAPTCHA, JS rendering requirements, and get a scrapeability score.
Bot Protection
Signals
- No notable signals
Security Headers
DNS Lookup
Query A, AAAA, MX, TXT, NS, CNAME, and SOA records for any domain.
HTTP Headers
See the exact response headers a server sends. Essential for debugging scrapers and APIs.
Response Headers
SSL Certificate Checker
Inspect TLS certificates, check expiry dates, view the full certificate chain, and verify validity.
Subject Alternative Names (SANs)
Certificate Chain
Frequently asked questions
Is it legal to port scan a website?
Scanning your own infrastructure is always fine. Scanning systems you don't own or manage without permission can violate terms of service or, depending on jurisdiction, computer access laws. Only scan hosts you're authorized to test.
Why is a port showing closed when I know a service is running?
A firewall may be blocking the port from this scanner's network location, the service may only bind to localhost instead of all interfaces, or a security group/ACL may allow your IP but not this checker's IP.
What ports should I check by default?
Common defaults include 21 (FTP), 22 (SSH), 25 (SMTP), 80/443 (HTTP/HTTPS), 3306 (MySQL), 5432 (Postgres), and 6379 (Redis). You can override this with any custom comma-separated port list.
Does an open port mean the service is vulnerable?
Not by itself. An open port just means something is listening. Whether it's exploitable depends on the service, its version, and its configuration, an open port is a starting point for further investigation, not a vulnerability finding on its own.