Connection

Check the speed of your internet connection.

Measures the speed and the response time of your connection to this server.

—download speedMbit/s
—upload speedMbit/s
—response timemilliseconds
—response time under loadmilliseconds
—video conferencingverdict of the measurement
—streaming and downloadingverdict of the measurement

The measurement runs over the worldwide network of Cloudflare, against the node closest to you. That way your own connection is measured and not the capacity of this website. Cloudflare keeps the result for its own statistics on internet quality; no personal data about you is sent along.

Technical details
DNS Checker

The public DNS data of a domain.

Enter a domain name and read out the public DNS records: addresses, mail servers, nameservers, TXT records and more.

Only public DNS information is requested. Records on unknown names (arbitrary subdomains, DKIM selectors) cannot be listed in full and may be missing.

Whois

The registration details of a domain

See the registration details of a domain: the registrar, when it was created and when it expires. Works for .nl, .com, .net, .org and most common extensions.

Personal data of private holders is shielded by most registries.

IP info

Location check of a server or IP address.

Enter a domain or IP address and see the IP address, the country, the provider and the network the server is on.

The location is an estimate based on the network and need not be the exact physical location of the server.

Password strength

How strong is your password?

Type a password and see how strong it is. This happens entirely in your own browser: no data is sent or stored.

Mail config

All mail-related DNS records.

An overview of the mail servers (MX), SPF, DMARC and DKIM of a domain.

SSL certificate

The certificate details of a website.

Read the TLS certificate of a website: the issuer, the validity, the expiry date and the domain names covered.

QR code

Make your own QR code.

Type an address or text and a QR code appears straight away.

Domain check

A thorough analysis of your domain name.

Enter your domain name and see within seconds how the email security, the website, the DNS setup and your mail platform are configured.

Only public information is requested: DNS data, the certificate of the website and the public headers. No email is sent to the domain, nothing is logged in to and nothing on your systems is accessed.

In the print dialog choose Save as PDF as the destination.