Network Tools
Diagnostics and lookups: ping, DNS, WHOIS, IP, headers and more.
Resolve DNS, check headers, verify TLS, email auth, see your public IP, ASN and subnets — tuned for speed, clarity and privacy.
DNS propagation, HTTP headers and redirects, SPF/DKIM/DMARC, TLS expiry and chain checks, ASN/prefix lookups, IP visibility and subnet math live here. Server-side execution keeps answers consistent and layouts stay readable on mobile and desktop.
Requests run from the edge so you see what users and crawlers see, not your browser cache. No third-party pixels; logging is minimal and packet captures are not stored beyond the request. Mail auth results include raw DNS plus policy summaries; headers show redirects, status codes, cache hints and security headers together.
Use these tools to validate launches, confirm DNS changes, verify CDN headers, audit TLS hygiene and fix email deliverability. Share links with your team without exposing tokens — inputs are fast, outputs are copyable, retries are instant.
FAQ
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Resolve DNS, check headers, verify TLS, email auth, see your public IP, ASN and subnets — tuned for speed, clarity and privacy.
DNS propagation, HTTP headers and redirects, SPF/DKIM/DMARC, TLS expiry and chain checks, ASN/prefix lookups, IP visibility and subnet math live here. Server-side execution keeps answers consistent and layouts stay readable on mobile and desktop.
Requests run from the edge so you see what users and crawlers see, not your browser cache. No third-party pixels; logging is minimal and packet captures are not stored beyond the request. Mail auth results include raw DNS plus policy summaries; headers show redirects, status codes, cache hints and security headers together.
Use these tools to validate launches, confirm DNS changes, verify CDN headers, audit TLS hygiene and fix email deliverability. Share links with your team without exposing tokens — inputs are fast, outputs are copyable, retries are instant.
Network Tools helps you answer the questions that block launches: is DNS propagated, what headers does the CDN serve, does TLS expire soon, is email auth configured, and what does a request look like from outside your browser cache. The tools are meant to be quick to run and easy to share.
Network debugging is usually about context. A different region can see a different CDN edge, a different redirect chain, or a different cached response. That’s why it’s useful to re-check from multiple angles and keep a record of the exact input you tested (domain, time, settings).
For reliability, start with the simplest checks: DNS records, headers, and IP/ASN context. Only then move to deeper tools like HAR analysis. Small misconfigurations—wrong CNAME, missing HSTS, wrong cache-control—cause the majority of real-world incidents.
Email deliverability is another common pain point. SPF/DKIM/DMARC configurations are easy to get almost-right and still fail. Validating records and policies early saves days of back-and-forth with inbox providers and clients.
Privacy: network data can include tokens and personal info. Redact where possible, and avoid sharing full captures publicly. Prefer minimal examples that reproduce the issue without exposing credentials.
A good network workflow is iterative: test, change one thing, test again. Clear outputs and copy-friendly results make those iterations faster.