🔐 Passwords
4 toolsPassword Strength Checker
Estimate password strength using length, character variety, repetition and common-pattern checks.
→🔐Password Generator
Generate a cryptographically strong random password in your browser.
→🔐Password Entropy Calculator
Calculate an illustrative search-space entropy estimate for a password.
→🔐Password Hashing Reference
Compare modern password-hashing approaches and recommended use cases.
→#️⃣ Hashing & Checksums
10 toolsSHA-256 Hash Generator
Generate a SHA-256 digest from text.
→#️⃣SHA-512 Hash Generator
Generate a SHA-512 digest from text.
→#️⃣SHA-384 Hash Generator
Generate a SHA-384 digest from text.
→#️⃣SHA-1 Hash Generator
Generate a SHA-1 digest for legacy compatibility and verification.
→#️⃣MD5 Hash Generator
Generate an MD5 digest for legacy checksum and compatibility use.
→#️⃣Multi-Hash Generator
Generate SHA-256, SHA-512, SHA-384, SHA-1 and MD5 values together.
→#️⃣Hash Compare
Compare two hash strings without case sensitivity.
→#️⃣CRC32 Text Checksum
Calculate CRC32 for text using the standard polynomial.
→#️⃣File Hash Calculator
Calculate SHA-256, SHA-384 and SHA-512 for a local file.
→#️⃣File Checksum Verifier
Verify a local file against a supplied SHA-256, SHA-384 or SHA-512 checksum.
→🔤 Encoding & Conversion
10 toolsBase64 Encoder
Encode UTF-8 text as Base64.
→🔤Base64 Decoder
Decode Base64 text as UTF-8.
→🔤URL Encoder
Percent-encode URL text safely.
→🔤URL Decoder
Decode percent-encoded URL text.
→🔤HTML Entity Encoder
Convert special HTML characters to entities.
→🔤HTML Entity Decoder
Decode common HTML entities and numeric entities.
→🔤Hex to Text Converter
Convert hexadecimal bytes to UTF-8 text.
→🔤Text to Hex Converter
Convert UTF-8 text to hexadecimal bytes.
→🔤Binary to Text Converter
Convert 8-bit binary bytes to UTF-8 text.
→🔤Text to Binary Converter
Convert UTF-8 text to 8-bit binary bytes.
→🔑 Cryptography & Tokens
7 toolsHMAC-SHA-256 Generator
Generate an HMAC-SHA-256 for text using a secret key.
→🔑HMAC-SHA-512 Generator
Generate an HMAC-SHA-512 for text using a secret key.
→🔑UUID v4 Generator
Generate RFC 4122 version-4 UUIDs using secure browser randomness.
→🔑UUID Validator
Validate UUID syntax and identify the version when present.
→🔑Secure Token Generator
Generate cryptographically strong random hexadecimal tokens.
→🔑Random Bytes Generator
Generate secure random bytes as hexadecimal or Base64.
→🔑TOTP Secret Generator
Generate a Base32 secret suitable for TOTP provisioning.
→🪪 JWT & Web Security
4 toolsJWT Decoder
Decode a JWT header and payload locally without verifying its signature.
→🪪JWT Builder (Unsigned)
Build an unsigned JWT for testing and development; it is not a signed credential.
→🪪Base64URL Tool
Encode or decode Base64URL data.
→🪪User-Agent Parser
Parse a user-agent string into broad browser, OS and device clues.
→🛡️ Web Security
6 toolsSecurity Headers Analyzer
Analyze pasted HTTP response headers for important security headers.
→🛡️CSP Header Generator
Build a practical Content-Security-Policy header from selected directives.
→🛡️HSTS Header Generator
Generate an HSTS response header from safe options.
→🛡️Permissions-Policy Generator
Generate a Permissions-Policy header from selected features.
→🛡️Referrer-Policy Generator
Generate a Referrer-Policy header.
→🛡️X-Content-Type-Options Generator
Generate the nosniff security header.
→🌐 Network & IP
8 toolsIPv4 Validator
Validate an IPv4 address and classify its basic range.
→🌐IPv6 Validator
Validate IPv6 syntax including compressed notation.
→🌐IP Address Validator
Validate IPv4 or IPv6 input and identify its family.
→🌐CIDR Calculator
Calculate network, broadcast, host range and host counts for IPv4 CIDR.
→🌐Subnet Mask Converter
Convert IPv4 subnet masks to prefix length and back.
→🌐IP Range Calculator
Calculate an inclusive IPv4 address range and host count.
→🌐CIDR Wildcard Calculator
Convert a prefix length to subnet mask and wildcard mask.
→🌐MAC Address Validator
Validate common MAC address formats and normalize them.
→📚 Security References
7 toolsCommon Ports Reference
Search common TCP/UDP ports and their typical services.
→📚HTTP Status Code Reference
Search HTTP status codes and their meanings.
→📚HTTP Methods Reference
Search common HTTP methods and their semantics.
→📚MIME Type Lookup
Find common MIME types by extension or type.
→📚DNS Record Reference
Search DNS record types and their purposes.
→📚JWT Claims Reference
Search standard JWT registered claims and meanings.
→📚OAuth Scope Reference
Search common OAuth/OpenID Connect scope names and uses.
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