Security Tools
Use browser-based helpers for password hygiene, hashes, tokens, network records, and security checks.
Password Generator
Generate a random password locally with adjustable length.
Open tool SecurityMD5 Hash Generator
Calculate an MD5 digest for text. MD5 is obsolete and must not be used for passwords or security.
Open tool SecuritySHA256 Hash
Calculate a SHA-256 digest for text in your browser.
Open tool SecurityUUID Generator
Generate a random UUID version 4 in your browser.
Open tool SecurityJWT Decoder
Decode the header and payload of a JSON Web Token locally. Decoding does not verify the signature.
Open tool SecurityIP Checker
Check IPv4 formatting and inspect an IPv6-shaped address.
Open tool SecurityWHOIS Lookup
Open a public WHOIS lookup for a domain. The lookup provider receives the domain you submit.
Open tool SecurityDNS Lookup
Query public DNS records for a domain using a DNS-over-HTTPS resolver.
Open tool SecurityPort Scanner
Review safe guidance for checking services on systems you own or are authorized to assess. This browser tool does not probe ports.
Open tool SecurityEmail Validator
Check email address formatting locally. This does not confirm that a mailbox exists.
Open tool SecurityCSR / Certificate Decoder
Inspect PEM headers and decode the encoded certificate or request bytes. This is not a trust or validity check.
Open tool SecurityPassword Strength Checker
Estimate password length and character variety locally. The entered value is not sent anywhere.
Open tool SecurityHash Identifier
Compare a hash’s length and character pattern with common hash formats. Identification is only a guess.
Open tool SecurityHMAC Generator
Generate an HMAC-SHA-256 authentication code in your browser.
Open tool SecurityBase32 Encoder
Encode and decode text using Base32.
Open tool SecurityDMARC / SPF Checker
Look up SPF and DMARC TXT records with a public DNS resolver.
Open tool SecurityReverse DNS Lookup
Look up PTR records for an IPv4 address through public DNS.
Open tool SecuritySSL Certificate Checker
Open public certificate transparency records for a domain. This does not test the live TLS connection.
Open tool SecuritySecurity Headers Checker
Open a public HTTP security-header report for a website. The report provider receives the URL.
Open tool SecurityBlacklist Checker
Open a public domain or IP reputation lookup. Results vary by provider and may be incomplete.
Open tool SecurityTOTP / 2FA Code Generator
Generate a time-based one-time code from a secret locally. Do not paste a real secret on a shared device.
Open tool SecurityMAC Address Lookup
Look up the registered vendor prefix of a MAC address using a public OUI database.
Open tool SecurityCIDR / Subnet Calculator
Calculate IPv4 network address, broadcast address, and usable host range from CIDR notation.
Open tool SecurityBcrypt Generator
Learn how to create a bcrypt hash in a trusted application runtime. This page does not send passwords to a remote service.
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Browse the complete collection of free tools for everyday tasks.