Useful Links
A curated collection of handy services for security, network, development and servers.
CuratedSearchable
Security 6
SSL Labs Server Test
Deep TLS/SSL configuration analysis
ssllabs.com
Security Headers
Check HTTP security headers of any site
securityheaders.com
Mozilla Observatory
Website security scan by Mozilla
developer.mozilla.org
Have I Been Pwned
Check accounts against data breaches
haveibeenpwned.com
OWASP Cheat Sheets
Concise application security guidance
cheatsheetseries.owasp.org
crt.sh
Certificate Transparency log search
crt.sh
Network & DNS 4
Development 7
MDN Web Docs
Reference for HTML, CSS and JavaScript
developer.mozilla.org
Can I use
Browser support tables
caniuse.com
regex101
Build and test regular expressions
regex101.com
CyberChef
The cyber swiss army knife
gchq.github.io
jwt.io
Decode and inspect JSON Web Tokens
jwt.io
explainshell
Explain shell commands
explainshell.com
PHP Manual
Official PHP documentation
php.net