Password Strength Checker
About Password Strength Checker
Check the strength of any password instantly. Analyze length, character variety, entropy, and resistance to brute-force and dictionary attacks. Get actionable feedback to create stronger passwords. Supports evaluation against common password patterns and provides a strength score from very weak to very strong. Your password is never sent to any server.
More Checker tools
DNS Lookup
Free online DNS lookup tool. Query DNS records for any domain including A, AAAA, MX, TXT, CNAME, NS, SOA, and PTR records. Instantly check where a domain points, find mail server records, verify TXT records for SPF, DKIM, and DMARC, and diagnose DNS propagation issues. No installation required — works directly in your browser.
IP Lookup
Look up detailed information about any IP address. Find the hostname, ISP, organization, country, and region associated with an IPv4 or IPv6 address. Useful for network diagnostics, identifying the origin of traffic, investigating suspicious connections, and verifying server configurations. Free, instant, and requires no sign-up.
Reverse IP Lookup
Perform a reverse IP lookup to find the hostname and domains associated with an IP address. Enter any IPv4 or IPv6 address to resolve its PTR record and discover what servers or websites are hosted on that IP. Useful for network auditing, cybersecurity investigations, and verifying server identity.
SSL Lookup
Check SSL/TLS certificate details for any domain. View the certificate issuer, subject, validity dates, and days remaining before expiration. Quickly verify whether a site's HTTPS certificate is valid, identify certificate authority (CA), and monitor certificate expiry to prevent downtime. Supports custom ports.