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Free IT tools

Troubleshoot DNS, email, and connectivity problems faster.

Run practical diagnostics for the issues IT teams hit every day: unreachable hosts, DNS lookup problems, open ports, mail server misconfiguration, blacklist checks, and domain intelligence.

Run Ping Check Mail Server Inspect Domain

Network diagnostics Ping, DNS lookup, traceroute, port checks, WHOIS, and IP research. Email diagnostics MX tests, mailbox checks, POP3/IMAP tests, and blacklist lookups. Need automation too? Use the DNS API when troubleshooting should become a repeatable workflow.

Free Online IT Tools	Network Tools Email Tools
Useful Tools for IT Professionals to troubleshoot problems, including network tools for network troubleshooting and SMTP Mail Checking tools for email troubleshooting.

Tools for Troubleshooting Network Issues

To determine if a server is responding to requests, you can use Ping. You provide an IP address or a domain name, and you can see if the host is responding or not.
Open Ping

The NsLookup tool allows you to provide a hostname and request one or more types of DNS records (e.g., A, NS, CNAME records).
Open NSLookup

If you are curious as to what path your requests are taking, as well as how long it takes to get from point A to point B (as well as intermediary stops), you can use the Traceroute tool.
Open Traceroute

Dig

Dig is a network administration command-line tool for querying the Domain Name System (DNS). dig is useful for network troubleshooting and for educational purposes. It can operate based on command line option and flag arguments, or in batch mode by reading requests from an operating system file.
Open Dig

If you are curious as to who the responsible party (or parties) is behind a domain name, the WHOIS query will allow you to query multiple domain registrar's databases. If the owner has chosen to hide their information, you can nevertheless return forwarding information.
Open Whois

Port check is a tool you can use to check your external IP address and detect open ports on your connection. It is useful for checking if port forwarding at the router is setup correctly or if the port is blocked by ISP (like SMTP port 25). It can also be used as a port scanner to scan open ports.
Open Port Check

Lookup who owns an IP address and inspect net range, ASN, reverse DNS, proxy, ip reputation, and registry ownership data.
Open IP Lookup

Collect detailed domain intelligence including registrar profile, WHOIS status, DNS records, and DNSSEC DS visibility.
Open Domain Intel

Analyze a website's technology stack using HTTP headers, DNS resolution, and page source fingerprints.
Open Web Tech

Tools for Troubleshooting Email or Email Server Problems

As SMTP Diagnostics Tool. MX Check will Troubleshoot your SMTP server to know whether the mail server is configured correctly for receiving your domain emails. It will pinpoint the problems of your SMTP server if it is not configured properly.
Open MX Check

Check email is a free email verification tool. It helps you validate any email address online for free. Check if mailbox really exists. The advance checking will give you completed details about this email address and its server settings
Open Check Email

A free Online POP3 test tool to help you troubleshoot if a POP3 mail server is working. POP3, is the most commonly used protocol for receiving email over the internet. When you use POP3 to check emails, POP3 will pull over all emails from remote servers to your local PC.
Open Check POP3

A free Online IMAP test tool to help you troubleshoot if a IMAP mail server is working. IMAP is an Internet standard protocol used by email clients to retrieve email messages from a mail server over a TCP/IP connection. With IMAP to check emails, all emails will remain at remote server.
Open Check IMAP

Check if your mail server IP is listed on major DNSBL blacklists used by anti-spam systems.
Open Black Lists

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