Free Network Diagnostic Tools
ProbeOps provides a comprehensive suite of free network diagnostic tools that test from 6 global locations simultaneously. Run SSL checks, DNS lookups, uptime tests, latency measurements, traceroutes, and port scans — all without signup.
Unlike single-location testing tools, ProbeOps shows you how your infrastructure performs for users around the world. Identify regional issues, CDN misconfigurations, DNS propagation delays, and geo-routing problems in seconds.
Available Tools
SSL Certificate Checker
Comprehensive SSL/TLS certificate analyzer that validates certificate chains, checks expiration dates, and verifies hostname matching from multiple global locations.
Key features:
- Multi-region SSL validation
- Certificate chain verification
- Expiration monitoring
- TLS version detection
- Hostname validation
Specialized variants:
- SSL Expiry Checker - Check when your SSL certificate expires. Monitor expiration dates from multiple global locations.
- Certificate Chain Checker - Verify the complete SSL certificate chain including intermediate and root certificates.
- TLS Version Checker - Test which TLS versions your server supports. Verify TLS 1.3 and TLS 1.2 compatibility.
- Multi-Region SSL Checker - Validate SSL certificates from multiple global locations. Perfect for CDN and multi-region deployments.
- SSL Hostname Checker - Verify that your SSL certificate correctly matches your domain name and subdomains.
DNS Lookup
Complete DNS lookup tool that queries A, AAAA, MX, TXT, NS, CNAME, and other DNS record types from multiple global DNS servers.
Key features:
- Multiple record types (A, AAAA, MX, TXT, NS, CNAME, SOA, CAA)
- Multi-region DNS resolution
- Propagation checking
- TTL information
- Reverse DNS lookup
Specialized variants:
- MX Record Lookup - Check mail exchange records and verify email server configuration from multiple locations.
- TXT Record Lookup - Check TXT records for SPF, DKIM, DMARC, and domain verification from multiple locations.
- NS Record Lookup - Check nameserver records and verify authoritative DNS configuration from multiple locations.
- CNAME Record Lookup - Check CNAME aliases and verify subdomain configuration from multiple global locations.
- CAA DNS Record Lookup - Query DNS CAA records to verify which certificate authorities are authorized to issue SSL/TLS certificates for your domain.
- Reverse DNS Lookup - Look up PTR records to find the hostname associated with an IP address. Essential for email deliverability.
Is It Down
Instant website availability checker that tests if a site is accessible from multiple global locations. Determine if the problem is you or the website.
Key features:
- Multi-region availability check
- Response time measurement
- HTTP status codes
- Redirect detection
- SSL verification
Specialized variants:
- Website Status Checker - Check website availability status from 6+ global locations instantly.
Latency Test
Test network latency and round-trip time from 6 global probe locations. Measure connection latency, TCP handshake time, and network path efficiency.
Key features:
- Multi-region latency testing
- Time to First Byte (TTFB)
- Connection time measurement
- DNS lookup time
- Historical comparison
Specialized variants:
- Website Response Time Test - Measure HTTP response time (not bandwidth) from multiple global locations. Test full request lifecycle from connection to response.
- TTFB Checker - Measure server processing time—how long until the server starts responding. Isolate backend performance from network latency.
Traceroute
Visual traceroute tool that shows the complete network path between our global probes and your target. Identify routing issues and network hops.
Key features:
- Multi-region traceroute
- Hop-by-hop latency
- RTT visualization
- Packet loss detection
- Destination reach status
Specialized variants:
- Network Path Analyzer - Deep analysis of network routing with hop-by-hop latency measurement, ASN identification, and geographic path visualization.
- Route Tracer - Trace the complete internet route from our global probes to your target. See every hop and identify where packets travel.
Port Checker
Test if specific TCP ports are open and accessible from multiple global locations. Check common ports like HTTP (80), HTTPS (443), SSH (22), and more.
Key features:
- Multi-region port check
- Common port presets
- Single port verification
- TCP connectivity test
- Firewall testing
Specialized variants:
- Open Port Checker - Check if ports are open from multiple global locations. Verify service accessibility and firewall configuration.
- Firewall Port Tester - Test if your firewall configuration allows or blocks specific ports from different geographic locations.
Global Probe Locations
All diagnostic tools run from 6 strategically located probe nodes for comprehensive worldwide coverage:
- US East (Ashburn, Virginia) - North America East Coast
- US West (Boardman, Oregon) - North America West Coast
- EU Central (Helsinki, Finland) - European Union
- AP South (Mumbai, India) - Asia Pacific South
- CA Central (Montreal, Canada) - Canada
- AP Southeast (Sydney, Australia) - Asia Pacific Southeast
How ProbeOps Tools Work
- Enter a domain name, hostname, or IP address
- Select the diagnostic tool you need (SSL, DNS, ping, etc.)
- Click Run to execute the test from all 6 global regions simultaneously
- View results broken down by region to identify location-specific issues
No installation or account required for basic testing. Results are available instantly in your browser.
Who Uses These Tools
- DevOps Engineers: Monitor infrastructure health, validate deployments, and troubleshoot connectivity issues across regions.
- SRE Teams: Identify regional outages, verify DNS propagation, and check SSL certificate status during incident response.
- Web Developers: Test CDN configurations, verify geo-routing, and ensure websites load correctly worldwide.
- Security Professionals: Validate SSL/TLS configuration, check for expired certificates, and verify firewall rules.
- QA Teams: Verify application behavior from different geographic locations during testing.
Frequently Asked Questions
Are these tools really free?
Yes, all diagnostic tools are free to use without signup. Free users can run up to 100 probes per month. Registered users get higher limits and access to scheduled monitoring, alerting, and historical data.
How accurate are multi-region tests?
Tests run directly from our probe servers in each region, giving you the same perspective as actual users in those locations. This is more accurate than VPN-based testing because there is no additional network hop.
Can I automate these tests via API?
Yes, all tools are available via our REST API for automation and integration. Paid plans include API access with authentication tokens. See our API documentation for details.
How often can I run tests?
Free users: 100 probes/month with manual execution. Paid plans include higher limits and scheduled probes for continuous monitoring.
Pricing
Basic tool access is free forever. For higher limits, API access, scheduled monitoring, and alerts, see our pricing plansstarting at $19/month.