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Password Strength Checker: What Actually Makes a Password Strong
26 September 2026
How password strength scoring works, the weak patterns most checkers catch, and practical tips to raise your score.
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Practical guides on WHOIS and RDAP, DNS, IP addresses, SSL/TLS, email deliverability, website security and domain intelligence — the same subjects our tools cover, explained in more depth.
Latest Articles
Random Password Generator: Best Practices for Strong Passwords
23 September 2026
Why length beats complexity, how a secure password generator actually works, and simple habits that keep your accounts safe.
Password Encryption Online: MD5, SHA and Bcrypt Explained
20 September 2026
A clear comparison of common hashing algorithms, when to use each one, and why bcrypt is the right choice for storing passwords.
SSL Certificate Checker Guide: How to Verify a Site's HTTPS Setup
17 September 2026
Learn how to read SSL certificate details, spot an expiring certificate before it breaks your site, and check any domain in seconds.
How to Run a Domain DNS Health Check (and What the Results Mean)
14 September 2026
A walkthrough of the six checks behind a domain DNS health audit, covering nameservers, MX, SPF, DMARC and SOA records.
MX Lookup Guide: How to Check and Fix Email Delivery Issues
11 September 2026
Understand MX records, common configuration mistakes, and how an MX lookup helps you diagnose why email is not arriving.
What Is Domain Risk, and How Do You Investigate a Suspicious Domain?
10 September 2026
A handful of technical signals — domain age, missing security configuration, DNS anomalies — can suggest a domain is worth a closer look. Here is how to read them responsibly.
What Do HTTP Status Codes Actually Mean?
10 September 2026
Every web response carries a three-digit status code. Here is what the main categories mean, and the specific codes worth actually knowing.
SPF, DKIM and DMARC Explained: How Email Authentication Works
10 September 2026
Three DNS records work together to stop attackers from sending email that looks like it came from your domain. Here is what each one actually does.
What Is HSTS, and Why Does It Matter?
10 September 2026
HSTS is a response header that tells browsers never to connect over plain HTTP again. Here is what problem it actually solves.
What Is an SSL Certificate, and How Does It Actually Work?
10 September 2026
The padlock icon in your browser represents an SSL/TLS certificate. Here is what it actually verifies, and what it does not.
What Does It Mean If an IP Is on a Blacklist?
10 September 2026
IP blacklists track addresses associated with spam or abuse. Here is what a listing actually means, why it happens even to innocent addresses, and how to check.
What Is CIDR Notation? A Practical Guide
10 September 2026
CIDR notation is the compact way networks describe a whole range of IP addresses at once, like 192.168.1.0/24. Here is how to actually read it.
IPv4 vs IPv6: What Is the Difference?
10 September 2026
Every device on the internet needs an address. Here is why the internet has two different addressing systems running side by side, and how to tell them apart.
What Is Domain Expiry, and Why Does It Matter?
10 September 2026
A domain registration is not permanent — it is leased for a fixed period and must be renewed. Here is what actually happens if it lapses, and how to check the date yourself.
What Is RDAP, and How Is It Different From WHOIS?
10 September 2026
RDAP is the modern replacement for the WHOIS protocol — structured, standardized, and built for machines to parse reliably. Here is what actually changed.
What Is WHOIS Lookup? A Plain-English Guide
10 September 2026
WHOIS is the public record system that tells you who registered a domain, when, and through which registrar. Here is what it actually shows, and what it does not.
NS Lookup Guide: How to Check a Domain's Nameservers
8 September 2026
Find out what NS records do, why nameserver redundancy matters, and how to check them after a hosting or DNS provider change.
Reverse IP Lookup Explained: How to Find a Hostname From an IP Address
5 September 2026
Learn what a reverse IP lookup does, why PTR records matter for email deliverability, and how to run one in seconds.
What Is a DNS Record? A Plain-English Guide
2 September 2026
A, AAAA, MX, CNAME, NS, TXT and SOA: what each DNS record type actually does, explained without the jargon.