Network Tools

Browse browser-based IP, CIDR, DNS, HTTP, port, certificate, and SSH utilities. Find the right network tool quickly without uploading data to a server.

Tools shown: 17

IP and CIDR

Inspect public addresses, normalize ranges, and convert between CIDR, IPv4, IPv6, and MAC-derived formats.

8

My IP Address

Discover your public IP address and get detailed information about your internet connection including geolocation, ISP details, and network information.

IP Info Lookup

Look up geolocation, ISP, ASN, reverse DNS, and network details for an IP address, domain, or URL.

CIDR Parser

Parse CIDR notation to inspect IPv4 or IPv6 network ranges, masks, and integer boundaries directly in the browser.

CIDRs Merger & Excluder

Merge IPv4 and IPv6 CIDR blocks, subtract excluded networks, and copy the minimal resulting CIDR list.

IP Range to CIDR Converter

Convert IPv4 or IPv6 start and end addresses into the minimal set of CIDR blocks that exactly covers the range.

IP/CIDR Normalizer

Normalize IP addresses and CIDR notation for both IPv4 and IPv6 formats. Enter any IP or CIDR range to get the standardized format instantly.

MAC Address to IPv6 Link-Local Address Converter

Convert MAC addresses to IPv6 link-local addresses. Enter any MAC address and optionally add an interface name to generate the scoped result instantly.

IPv6 Address to MAC Address Converter

Convert IPv6 addresses to MAC addresses. Enter any IPv6 address to extract the corresponding MAC address instantly.

DNS and Domains

Query DNS records, reverse-resolve IP addresses, and convert internationalized domain names.

3

DNS Lookup

Query A, AAAA, CNAME, MX, TXT, NS, SOA, CAA, SRV, HTTPS, and SVCB DNS records through DNS over HTTPS resolvers.

Reverse IP Lookup

Look up reverse DNS PTR records for IPv4 or IPv6 addresses through public DNS-over-HTTPS resolvers directly in the browser.

Unicode ↔ Punycode Converter

Convert Unicode (IDN) and ASCII (Punycode) domains both ways.

Protocol References

Look up HTTP status codes, MIME types, port numbers, and network clock information.

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HTTP Status Code Lookup

Search and browse HTTP status codes and their meanings.

Port Number Lookup

Search and browse common network port numbers.

MIME Type Lookup

Search and browse MIME types and their file extensions.

Current Network Time

Get the current network time and compare it with your local system time. View accurate network time and detect any time differences.

Keys and Certificates

Inspect TLS certificate details and generate fingerprints for SSH public keys.

2

X.509 Certificate & Public Key Parser

Parse X.509 certificates and public keys in PEM, DER, or base64 DER form. Review subjects, issuers, validity dates, fingerprints, extensions, and key details locally in your browser.

SSH Public Key Fingerprint

Generate SHA-256 and MD5 fingerprints for OpenSSH public keys, authorized_keys lines, and SSH2 public key blocks.

Network Tools is a starting point for browser-based networking tasks. Use it when you know the kind of problem you are solving but want a faster route to the right utility: inspect an IP range, query DNS records, decode an internationalized domain, look up a port, or check a certificate or SSH key fingerprint.

What You Can Do

  • Work with IPv4, IPv6, CIDR blocks, address ranges, and MAC-derived link-local addresses.
  • Query DNS and reverse DNS records through browser-friendly lookup tools.
  • Look up HTTP status codes, MIME types, port numbers, and current network time.
  • Inspect certificate and public-key details without sending the source material to a server.

Choosing the Right Tool

Start with IP and CIDR when the input is an address, range, subnet, or routing block. Use DNS and Domains for records, PTR lookups, and IDN/Punycode conversion. Use Protocol References when you need a quick lookup table. Use Keys and Certificates when the source material is a TLS certificate, public key, or SSH authorized key entry.

Privacy Notes

Most tools in this collection run entirely in your browser. Tools that need public network data, such as DNS lookups or IP information, may contact the resolver or lookup service required to answer that query. Avoid pasting secrets into public lookup tools, and prefer local-only tools for certificate and key inspection when the material is sensitive.