Security Tools Online
Generate strong passwords, check SSL certificates, inspect DNS records, and look up any domain. Security and network tools live together here because most checks need both.
All tools
Every tool below is free, works instantly, and needs no sign up.
Why security and network tools appear together
A domain’s security posture and its network setup are usually the same investigation. Checking a site’s SSL certificate often means checking its DNS records too, and a strong password matters less if the server behind it has an open port it should not. This page brings both tool sets together so you can move between them without switching pages.
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Related tool categories
Every category on ConvertNow, each one free and updated as new tools launch.
Understanding Security
What these tools are for, and how to get the most reliable result from them.
Practical security checks, not a full audit
These tools cover the checks people actually run day to day, generating a strong password, testing how crackable an existing one is, or creating an HMAC signature for an API integration. They are not a substitute for a professional penetration test on production systems.
Know what a domain is doing before you trust it
DNS lookup, SSL certificate checks, domain age and HTTP header inspection all answer a version of the same question, is this domain configured the way it should be. Running a few of these checks together builds a much clearer picture than any single one alone.
Good habits start with good defaults
Use a unique, generated password for every account rather than reusing one across sites. Check a certificate before entering payment details on an unfamiliar domain. Small habits like these do more for everyday security than most advanced tools.
Frequently asked questions
Straight answers to what people ask most about these tools.
Are generated passwords stored anywhere?
No. Passwords are generated in the moment you request them and are not logged, saved or transmitted anywhere for storage.
Why do I need a different password for every site?
If one site is breached and passwords leak, reused passwords let attackers into every other account that shares them. A password manager combined with a unique password for each site is the strongest everyday defense.
What does the SSL certificate checker actually verify?
It checks whether a site’s certificate is valid, who issued it, and when it expires. It does not scan the site for malware or other vulnerabilities, it focuses specifically on the certificate itself.
Why would I need to check DNS records?
DNS records control where a domain’s traffic, email and verification checks point. You would check them when setting up a new domain, troubleshooting email delivery, or confirming a site migration completed correctly.
Is a newly registered domain automatically suspicious?
Not automatically, but domain age is one signal among many that security researchers look at. A very new domain combined with other red flags is worth a closer look before you trust it.
Why are network tools like DNS lookup and domain age grouped with security tools?
Because in practice, checking a domain’s security setup and its network configuration go hand in hand. Keeping both tool sets on one page saves you from jumping between separate sections for one investigation.
How to use these tools
The same simple flow works across every tool on this page.
Pick a tool from the combined grid
Security and network tools sit together above, so everything for one investigation is in reach.
Enter what you are checking
A password to test, or a domain and URL to inspect.
Review the result
A strength score, certificate details, or a full set of DNS records.
Act on what you find
Update a weak password, or fix a misconfigured record before it causes a problem.
Syntax and reference
Formulas, formats and quick references used across this category.
Common DNS record types
| A | Points a domain to an IPv4 address |
|---|---|
| CNAME | Aliases one domain name to another |
| MX | Sets mail server priority for a domain |
| TXT | Holds verification and policy text, like SPF |
| NS | Lists the name servers responsible for a domain |
HTTP response header example
HTTP/1.1 200 OK
Content-Type: text/html; charset=UTF-8
Strict-Transport-Security: max-age=63072000Password strength guidance
Aim for 12 or more characters, mixing upper case, lower case, numbers and symbols. Length matters more than complexity alone.Built to be trusted, every time
No dark patterns, no forced accounts, and nothing you type is kept longer than it takes to give you an answer.
Nothing you enter is stored
Inputs are used only to generate your result, in that moment.
Free, with no catch
No sign up, no trial period, no hidden paywall on any tool.
Works on any device
Every tool is built to work on desktop, tablet and mobile.