Network Diagnostics and More
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Welcome to Network Diagnostics and More

Understand and test your connection.

Start with a guided recommendation or open a specific network tool.

Run a quick speed testBrowse technical tools

Free to use · no subscription · no mandatory account · no paid diagnostic API required

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What are you trying to diagnose?

Choose the closest description and the website will recommend the most useful place to begin.

Recommended toolInternet Speed Test

Measure download, upload and latency, then compare repeated results.

Open Internet Speed Test

Find a tool

Search every diagnostic

Search by task, protocol or symptom. Favourites and recently opened tools remain only on this device.

Important informationAccuracy and reliability noticeResults may be incomplete, delayed, misleading or wrong. Never use a single result as proof of a fault, service level, security condition or correct configuration.

Do not rely on these tools alone

Treat every result as a preliminary indicator only. Before purchasing equipment, changing a live network, reporting a contractual fault, assessing security or making a safety- or compliance-related decision, verify the finding with the relevant provider, manufacturer documentation, an independent test and an appropriately qualified professional.

Speed, quality and ping

Results can vary because of device performance, browser behaviour, background downloads, Wi-Fi or mobile signal, network adapters, local or ISP congestion, VPNs, proxies, security filtering, routing, and test-server distance or load.

Public IP and location

The public IP is the address visible to the service and may be affected by VPNs, proxies, carrier-grade NAT or IPv6 routing. Geographic coordinates come from the browser and may be approximate because of GPS, Wi-Fi, mobile-network, permission and device limitations.

Port, DNS, MAC, subnet and analyzer checks

Port tests originate from the hosted test service, not directly from your device. Firewalls, NAT, access rules, routing and filtering can change the result. DNS answers can differ because of resolver choice, caching, propagation delays, split DNS and record availability. The Network Analyzer displays only requests generated by this diagnostics website; it cannot capture traffic from other websites, applications or devices. MAC vendor results depend on external registration data and may be unavailable, outdated or different from the finished-device brand. Local and randomized MAC addresses do not provide a reliable vendor identity. Subnet results are mathematical calculations based on the entered address and prefix; they do not verify the configuration of a live network.

Comparison, monitoring and health summaries

Saved-test comparisons do not prove that either connection is faulty because the device, route and test conditions may have changed. Reliability monitoring uses browser HTTP requests and may pause when a tab is hidden or a mobile device sleeps. The health score is a weighted diagnostic summary; missing data reduces its coverage and it is not a certified fault rating.

SSL, security headers and RDAP

HTTPS and security-header checks originate from the hosted service and do not replace a security audit. Certificate details may depend on an external cached assessment. RDAP information comes from public registries and may be incomplete, delayed or identify a registered resource holder rather than the current operator or physical location.

Reports, saved data and generated passwords

Support reports exclude public IP, location, passwords and private deletion tokens, but user-entered labels and notes may still contain personal information. The privacy dashboard controls data in the current browser only. Generated wireless passwords are not stored, cannot be recovered here and do not guarantee security without appropriate router settings and safe handling.

Guided workflows, alerts, health and administration

Guided troubleshooting organises evidence but cannot identify every root cause. Browser alerts and monitoring work only while the page remains active. Service-health history is visitor-observed, not continuous independent monitoring. Maintenance mode is manually controlled, aggregate usage counters cannot identify unique users, and automated accessibility checks do not replace manual or assistive-technology testing.

A repeated result can improve confidence but still does not prove the cause of a fault or the correctness of a configuration. Use a wired connection where practical, control other activity, repeat tests at different times and confirm important findings with an independent method.

This browser and device

Recent activity

Private browser storage
Active shared reports–

Public IP and location are never included.

Manage links

Everyday checks

Quick checks

Start with these tools when you want a simple view of speed, responsiveness or browser-reported location.

FeaturedOpen access

Run Full Diagnostics

Create one browser-based report covering diagnostic throughput, idle and loaded latency, connection stability, request loss, protocol details and browser capabilities.

  • 20–30 seconds
  • Live progress
  • Stability chart
  • CSV export
  • Privacy-safe temporary sharing
Start full diagnostics
01Open access

Internet Speed Test

Measure your Internet connection speed with one to ten tests. Review average download and upload speeds, latency, estimated line speed, public IP address, and device and browser information.

  • Run 1-10 speed tests
  • Review results in a table
  • Export results to CSV or clear them
Open tool
02Open access

Connection Quality

Assess the responsiveness and stability of your Internet connection using latency, jitter and packet-loss measurements.

  • View the connection-quality result
  • Review individual measurements
  • Export results to CSV or clear them
Open tool
03Open access

Geographic Location

Request the browser-reported latitude and longitude for your device and display the reported position on an interactive map.

  • Permission requested only when selected
  • View coordinates and accuracy
  • Open the reported position on a map
Open tool

Advanced checks

Technical tools

Use these targeted tools when you know which network service or address information you need. Protected tools request the technical password before opening.

04Technical password

Ping Test

Run four browser-based latency requests or select continuous mode to keep measuring until you stop the test.

  • Choose 4 requests or continuous mode
  • Review responses in a results table
  • Export results to CSV or clear them
Open protected tool
05Technical password

Port Test

Check whether a TCP port on a destination IP address or fully qualified domain name can be reached by the hosted test service.

  • Enter an IP address or hostname
  • Choose the destination port
  • Review, export or clear results
Open protected tool
06Technical password

DNS Lookup

Look up public DNS records, compare resolvers and review core DNS and email-security publishing.

  • Sixteen DNS record types and reverse lookup
  • SPF, DMARC, DKIM, CAA and DNSSEC review
  • MTA-STS, TLS-RPT and BIMI publishing checks
Open protected tool
07Technical password

Network Analyzer

Monitor requests generated by this diagnostics website, inspect browser timing information, and create controlled download or upload traffic for analysis.

  • View a live request timeline and timings
  • Generate controlled same-site traffic
  • Export results to CSV or clear them
Open protected tool
08Open access

MAC Address Vendor Finder

Identify the organisation registered to a device MAC address prefix and review the available allocation details.

  • Accept common MAC address formats
  • Identify randomized or local addresses
  • Export results to CSV or clear them
Open tool

Design and cabling

Plan a new network

Calculate an IPv4 addressing plan, compare fibre categories and search vendor-specific switch and firewall references.

09Open access

IPv4 Subnet Calculator

Calculate the IPv4 network, broadcast address, usable host range, subnet mask, wildcard mask and address capacity.

  • Accept CIDR prefixes or subnet masks
  • Calculate /0 through /32 networks
  • Export results to CSV or clear them
Open tool
10Technical password

Fibre Cable Guide

Compare single-mode and multimode fibre, OS and OM cable categories, connector choices, and 1000BASE-SX versus 1000BASE-LX optics.

  • See representative fibre cable imagery
  • Compare OS1/OS2 with OM1-OM5
  • Match SX or LX optics to the cable
Open protected tool
10ATechnical password

Switch and Firewall Cheat Sheet

Search concise, version-labelled operational references for enterprise switches and firewalls from more than twenty vendors.

  • Search vendors, platforms, tasks and commands
  • Copy read-only operational commands
  • Open linked manufacturer documentation
Open protected tool

More capabilities

Utilities, reports and operations

Open specialist checks, support workflows and service-status tools. Administrative and accessibility functions now have dedicated sections below.

11Open access

Wireless Password Generator

Generate a strong random wireless-network password or a memorable passphrase securely within your browser.

  • Choose password or passphrase mode
  • Adjust length and character options
  • Generate and copy without storing the value
Open tool
12Open access

IPv4 and IPv6 Readiness

Check whether this browser can demonstrate IPv4 connectivity and whether an IPv6 route is observed.

  • Test an IPv4-only address service
  • Observe dual-stack protocol selection
  • Export results to CSV or clear them
Open tool
13Technical password

SSL Certificate Checker

Check public HTTPS reachability, runtime certificate trust, HSTS and available cached certificate details.

  • Public hostnames on HTTPS port 443
  • Review trust and certificate dates
  • Export results to CSV or clear them
Open protected tool
14Open access

Support Report

Combine selected local speed, diagnostic and device information into a privacy-redacted support report.

  • Exclude public IP and location
  • Download structured JSON
  • Print or save the report as PDF
Open tool
15Open access

Connection Comparison

Compare two locally saved speed tests side by side using their connection labels, notes and quality measurements.

  • Compare download, upload and latency
  • Review confidence and bufferbloat
  • Keep public IP and location excluded
Open tool
16Open access

Reliability Monitor

Monitor browser-to-service reachability and response time for a chosen period while the page remains open.

  • Choose interval and duration
  • Review loss and delayed checks
  • Export the timeline to CSV
Open tool
17Open access

Network Health Summary

Combine recent measurements and current checks into a transparent weighted network-health summary.

  • Review score and coverage
  • See every contributing measurement
  • Keep IP address values out of storage
Open tool
19Technical password

RDAP Domain and IP Lookup

Look up public domain and IP registration information through the Registration Data Access Protocol.

  • Accept public domains or IP addresses
  • Review registration entities and events
  • Export the result to CSV
Open protected tool
20Open access

Guided Troubleshooting

Follow an ordered diagnostic workflow, mark steps complete and carry context into a support report.

  • Choose the problem type
  • Track progress on this device
  • Use a repeatable support sequence
Open tool
21Open access

All Tools Directory

Search the complete diagnostic collection and keep device-local favourites and recently opened tools.

  • Search by task or symptom
  • Pin favourite tools
  • Reopen recent tools
Open tool
22Open access

Service Health

Check the currently observed availability of hosted components and review recent visitor-observed checks.

  • Refresh current component health
  • Review response timings
  • See 30-day observed history
Open tool

Guidance and inclusion

Help & Privacy

Review saved browser data alongside the site’s help, accuracy and privacy guidance.

18Open access

Saved Data and Privacy

Review which Network Diagnostics and More features have stored data in this browser and remove it by category.

  • See local storage categories
  • Clear individual categories
  • Erase all local diagnostic data
Open tool