Connection
Start with speed and public IP when the issue affects one device, office or network.
Network & web collection
19 verified toolsNetwork & Website Diagnostic Tools
Investigate connection, domain, certificate, redirect, header, caching, security-policy and browser-configuration problems with focused reports and practical next steps.
Choose the closest signal
Avoid random troubleshooting
Begin with the layer closest to the symptom. A local speed problem, stale DNS record and redirect loop require different evidence and different fixes.
✓ Connection and public IP
✓ DNS and certificate
✓ Status and redirect chain
✓ Headers, caching and CSP
Domain
Inspect DNS and SSL after nameserver, hosting, mail or certificate changes.
Delivery
Check status codes, redirects, headers, caching and CSP after deployment.
Browser
Parse URLs, cookies and user agents when debugging client-side behaviour.
Diagnostic suite
Browse network and web tools
Live checks are point-in-time observations. Parser, generator and reference tools run locally where practical.
Connection01
Internet Speed Test
Measure approximate download, upload, ping and jitter from the current browser.
Open tool →Connection02
IP Address Checker
View the public IP address and available connection-location information.
Open tool →Domain03
DNS Lookup
Query common A, AAAA, MX, TXT, CNAME, NS and SOA records.
Open tool →Domain04
SSL Certificate Checker
Inspect certificate validity, issuer, names, protocol and expiry.
Open tool →Delivery05
Website Status Checker
Check a public URL's status code, final URL and response time.
Open tool →Delivery06
Redirect Checker
Trace HTTP redirect hops and identify the final destination.
Open tool →Delivery07
HTTP Headers Checker
Inspect live response headers and common security-header coverage.
Open tool →Parse08
HTTP Header Parser
Parse pasted request or response headers into a readable structure.
Open tool →Parse09
HTTP Cookie Parser
Parse Cookie and Set-Cookie values and inspect common attributes.
Open tool →Delivery10
Cache-Control Analyzer
Understand browser and CDN cache directives and common conflicts.
Open tool →Security11
CSP Analyzer
Review Content Security Policy directives and common weaknesses.
Open tool →Parse12
User Agent Parser
Interpret a browser or crawler user-agent string locally.
Open tool →Parse13
URL Parser & Analyzer
Break a URL into protocol, host, port, path, query and fragment.
Open tool →SEO14
Robots.txt Tester
Test crawler directives against a selected URL path.
Open tool →SEO15
Sitemap XML Validator
Inspect sitemap structure, URL locations, duplicates and common limits.
Open tool →SEO16
Open Graph Preview
Review social metadata and a practical shared-link preview.
Open tool →Reference17
MIME Type Lookup
Look up common media types by file extension or MIME value.
Open tool →Test data18
MAC Address Generator
Generate locally administered MAC-style values for safe test data.
Open tool →Security19
Password Generator
Generate strong random passwords locally in the browser.
Open tool →Connection checks
Repeat speed tests at different times and compare wired, Wi-Fi and mobile connections. One test does not prove a permanent service problem.
Domain and certificate checks
DNS and certificate observations can differ by resolver and region. Allow for propagation and compare with your authoritative provider.
Website delivery checks
Use status, redirect, header, cache and CSP evidence together when validating releases or diagnosing inconsistent browser behaviour.
Security and responsible use
Use live checks only for public destinations and systems you are authorised to inspect. Private, local and reserved network targets are blocked. Never treat a quick diagnostic as a complete vulnerability assessment or production approval.
Frequently asked questions
Are these network tools free?
Yes. The listed tools can be used without creating an account.
Can website checkers access private networks?
No. Server-side URL checks are intended for public HTTP and HTTPS destinations. Localhost, private and reserved IP ranges and unsupported ports are blocked.
Why can results differ from another service?
Resolver location, server region, caches, network route, browser conditions and check timing can all change the observed result.
Are network results permanent?
No. DNS, certificates, routes, headers and hosting responses can change. Repeat important checks and record when and where the observation was made.
Do these tools replace a security audit?
No. They provide focused diagnostics and informational checks, not penetration testing, compliance certification or a complete security review.
Related collections
Choose with confidence
How to use Network & Web Tools effectively
Start with the outcome you need, use the smallest suitable tool, and verify the downloaded or copied result before relying on it. The guidance below helps turn individual utilities into a reliable workflow.
Website owners
Developers and DevOps teams
Support engineers checking public services
Start here
Pick the right first step
01
Check the public symptom
Start with the exact domain, URL or IP reported by the user.
02
Separate DNS, TLS and HTTP
Test each layer independently instead of assuming one failure explains everything.
03
Record time and location
Network results can change by region, resolver and time.
Before you finish
Quality-check the result
- ✓Use the exact hostname
- ✓Distinguish local and public failures
- ✓Do not expose private infrastructure details
- ✓Treat lookup results as point-in-time observations
Recommended workflows
Complete the task, not just one conversion
Investigate a website problem
- 1Confirm the URL
- 2Check DNS resolution
- 3Inspect SSL and HTTP response
- 4Retest from the affected environment
Review a new domain
- 1Confirm DNS records
- 2Check certificate details
- 3Inspect redirects and headers
- 4Document expected ownership and renewal dates
Continue your workflow