cybersecurity
Free
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AES-256-GCM Decrypt
Decrypt AES-256-GCM ciphertext with authentication verification.
Open toolCybersecurity & Cryptography
Hashing, encryption, encoding, HMAC, and cryptographic tools.
cybersecurity
Free
Private
AES-256-GCM Encrypt
Encrypt text with AES-256-GCM - the recommended encryption standard.
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cybersecurity
Free
Private
AES Block Demo
Visualize AES block-by-block encryption process.
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cybersecurity
Free
Private
AES-CBC Demonstration
Educational demonstration of AES-CBC mode - understand why AES-GCM is preferred.
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cybersecurity
Free
Private
AES Concept Demo
Visualize how AES processes data through SubBytes, ShiftRows, and AddRoundKey.
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cybersecurity
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AES-CTR Demonstration
Educational demonstration of AES-CTR (Counter) mode.
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cybersecurity
Free
Private
AES-GCM Decrypt
Decrypt AES-256-GCM ciphertext with authentication verification.
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cybersecurity
Free
Private
AES-GCM Encrypt
Encrypt plaintext with AES-256-GCM authenticated encryption - entirely in your browser.
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cybersecurity
Free
Private
AES Key Generator
Generate cryptographically secure AES-128, AES-192, or AES-256 keys.
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cybersecurity
Free
Private
AES Nonce/IV Generator
Generate cryptographically secure nonces for AES-GCM encryption.
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cybersecurity
Free
Private
Affine Cipher Demo
Interactive Affine cipher — E(x) = (ax + b) mod 26.
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cybersecurity
Free
Private
Argon2id Password Hash Generator
Hash passwords with Argon2id - the modern recommended password hashing algorithm.
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cybersecurity
Free
Private
ASCII Converter
Convert text to ASCII decimal codes and back, entirely in your browser.
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cybersecurity
Free
Private
Atbash Cipher Demo
Interactive Atbash cipher — A↔Z, B↔Y, C↔X, etc.
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cybersecurity
Free
Private
Base64 Decoder
Encode and decode Base64 data, entirely in your browser.
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cybersecurity
Free
Private
Base64 Encoder
Encode and decode Base64 data, entirely in your browser.
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cybersecurity
Free
Private
Base64URL Decoder
Encode and decode Base64URL data, entirely in your browser.
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cybersecurity
Free
Private
Base64URL Encoder
Encode and decode Base64URL data, entirely in your browser.
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cybersecurity
Free
Private
bcrypt Password Hash Generator
Hash passwords with bcrypt - widely supported adaptive hashing.
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cybersecurity
Free
Private
Binary Converter
Convert text to binary (0s and 1s) and back, entirely in your browser.
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cybersecurity
Free
Private
Caesar Cipher Demo
Educational demonstration of the Caesar cipher.
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cybersecurity
Free
Certificate Decoder
Decode and parse X.509 certificates with structured output.
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cybersecurity
Free
Certificate Expiry Checker
Check certificate expiration status and remaining validity.
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cybersecurity
Free
Certificate Fingerprint Calculator
Calculate SHA-1 and SHA-256 fingerprints of certificates.
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cybersecurity
Free
Certificate Inspector
Decode and analyze X.509 SSL/TLS certificates.
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cybersecurity
Free
CIDR Calculator
Calculate subnet details from CIDR notation (IPv4 and IPv6).
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cybersecurity
Free
Private
Columnar Transposition Demo
Interactive Columnar Transposition cipher — write in rows, read by key-ordered columns.
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cybersecurity
Free
Private
Cookie Security Analyzer
Analyze Set-Cookie headers for security issues.
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cybersecurity
Free
Private
CORS Header Generator
Generate CORS headers.
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cybersecurity
Free
Private
CSP Builder
Build Content Security Policy headers interactively.
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cybersecurity
Free
Private
CSP Generator
Generate CSP headers from security presets.
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cybersecurity
Free
CSR Decoder
Decode Certificate Signing Requests (CSRs).
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cybersecurity
Free
CSR Generator
Generate Certificate Signing Requests with key pairs.
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cybersecurity
Free
DER to PEM Converter
Convert DER-encoded certificates to PEM format.
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cybersecurity
Free
Private
Diffie-Hellman Demo
Educational demonstration of classic Diffie-Hellman key exchange.
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cybersecurity
Free
Private
Diffie-Hellman Visual
Visual walkthrough of Diffie-Hellman key exchange.
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cybersecurity
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Private
Digital Signature Demo
See how digital signatures prove message authenticity with public/private key pairs.
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cybersecurity
Free
DNS Record Formatter
Format and validate DNS records (zone file format).
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cybersecurity
Free
Private
DNS Record Reference
Reference for DNS record types and their security implications.
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cybersecurity
Free
Private
ECDH Key Agreement
Derive a shared secret using Elliptic Curve Diffie-Hellman.
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cybersecurity
Free
Private
ECDSA Key Generator
Generate ECDSA P-256 key pairs for digital signatures.
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cybersecurity
Free
Private
ECDSA Signature
Create a digital signature with ECDSA.
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cybersecurity
Free
Private
ECDSA Verify
Verify an ECDSA digital signature.
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cybersecurity
Free
Private
File Entropy Analyzer
Calculate Shannon entropy and byte frequency distribution of any file.
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cybersecurity
Free
Private
File Extension Analyzer
Analyze file extensions for trust level, expected MIME type, and security risks.
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cybersecurity
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Private
File Hash Comparison
Compare a file's hash against an expected value or compare two files.
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cybersecurity
Free
Private
File Integrity Checker
Full file integrity report: multiple hashes, entropy, and metadata — all in your browser.
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cybersecurity
Free
Private
File MD5 Hash Generator
Calculate the MD5 hash of a file. MD5 is legacy — use SHA-256 for security.
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cybersecurity
Free
Private
File MIME Type Detector
Detect a file's true MIME type from its magic bytes — don't trust the extension.
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cybersecurity
Free
Private
File SHA-256 Hash Generator
Calculate the SHA-256 hash of any file, entirely in your browser.
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cybersecurity
Free
Private
File SHA-3 Hash Generator
Calculate the SHA-3-256 hash of any file, entirely in your browser.
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cybersecurity
Free
Private
File SHA-512 Hash Generator
Calculate the SHA-512 hash of any file, entirely in your browser.
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cybersecurity
Free
Private
File Size Analyzer
Analyze file size in bytes, KB, MB, GB with detailed breakdown.
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cybersecurity
Free
Private
Hash Avalanche Demo
See how a tiny change in input causes a completely different hash output.
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cybersecurity
Free
Private
Hash Checksum Verifier
Verify a hash checksum by comparing it against an expected value.
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cybersecurity
Free
Private
Hashing vs Encryption vs Encoding Demo
Understand the fundamental difference between hashing, encryption, and encoding.
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cybersecurity
Free
Private
Hex Decoder
Encode and decode Hex data, entirely in your browser.
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cybersecurity
Free
Private
Hex Encoder
Encode and decode Hex data, entirely in your browser.
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cybersecurity
Free
Private
HMAC Demonstrator
See how HMAC combines a secret key with hashing for authenticated messages.
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cybersecurity
Free
Private
HMAC-SHA256 Generator
Generate an HMAC-SHA256 signature from a key and message, entirely in your browser.
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cybersecurity
Free
Private
HMAC-SHA512 Generator
Generate an HMAC-SHA512 signature from a key and message, entirely in your browser.
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cybersecurity
Free
Private
HSTS Header Generator
Generate Strict-Transport-Security headers.
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cybersecurity
Free
Private
HTML Entity Decoder
Encode and decode HTML Entity data, entirely in your browser.
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cybersecurity
Free
Private
HTML Entity Encoder
Encode and decode HTML Entity data, entirely in your browser.
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cybersecurity
Free
Private
HTTP Status Code Reference
Quick reference for HTTP status codes.
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cybersecurity
Free
IP Address Validator
Validate IPv4 and IPv6 addresses.
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cybersecurity
Free
IPv4 Address Converter
Convert IPv4 addresses between dotted, integer, hex, binary, and octal.
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cybersecurity
Free
IPv4 Integer Converter
Convert between IPv4 addresses and their integer representations.
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cybersecurity
Free
IPv4 Range Calculator
Calculate IPv4 ranges and summarize CIDR blocks.
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cybersecurity
Free
IPv4 Subnet Calculator
Calculate IPv4 subnet details from IP and prefix.
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cybersecurity
Free
IPv6 Address Converter
Convert IPv6 addresses between compressed and expanded forms.
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cybersecurity
Free
IPv6 Subnet Calculator
Calculate IPv6 subnet prefix and interface ID.
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cybersecurity
Free
Private
JWT Claims Viewer
View and analyze JWT claims with explanations and security warnings.
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cybersecurity
Free
Private
JWT Decoder
Decode and inspect JSON Web Tokens (JWT) locally.
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cybersecurity
Free
Private
JWT Expiration Checker
Check if a JWT is expired or when it will expire.
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cybersecurity
Free
Private
JWT Header Decoder
Decode the header segment of a JSON Web Token.
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cybersecurity
Free
Private
JWT Payload Decoder
Decode the payload segment of a JSON Web Token.
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cybersecurity
Free
Private
JWT Structure Analyzer
Analyze JWT structure, algorithm, and format.
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cybersecurity
Free
Private
JWT Timestamp Converter
Convert between Unix timestamps and human-readable dates for JWT claims.
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cybersecurity
Free
MAC Address Formatter
Format MAC addresses in different notation styles.
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cybersecurity
Free
MAC Address Generator
Generate random MAC addresses with configurable options.
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cybersecurity
Free
Private
MD5 Hash Generator
Generate a MD5 hash of any text, entirely in your browser. ⚠️ MD5 is a legacy algorithm and should NOT be used for modern security purposes (digital signatures, certificate validation, or password hashing). It is provided here for educational reference and legacy compatibility checking.
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cybersecurity
Free
Private
Passphrase Generator
Generate memorable passphrases from random words using theDiceware method.
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cybersecurity
Free
Private
Password Entropy Calculator
Calculate the entropy (randomness) of a password in bits.
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cybersecurity
Free
Private
Password Generator
Generate cryptographically secure random passwords with customizable options.
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cybersecurity
Free
Private
Password Hash Identifier
Identify the format and algorithm of a password hash.
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cybersecurity
Free
Private
Password Strength Checker
Analyze password strength, entropy, and common weaknesses - entirely in your browser.
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cybersecurity
Free
Private
PBKDF2 Password Hash Generator
Hash passwords with PBKDF2 - NIST-recommended key derivation.
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cybersecurity
Free
PEM Decoder
Decode PEM-encoded certificates, keys, and CSRs.
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cybersecurity
Free
PEM Encoder
Encode data to PEM format.
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cybersecurity
Free
PEM to DER Converter
Convert PEM-encoded certificates to DER hex.
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cybersecurity
Free
Private
Permissions Policy Generator
Generate Permissions-Policy headers.
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cybersecurity
Free
Private
Playfair Cipher Demo
Interactive Playfair cipher — digraph substitution using a 5×5 grid.
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cybersecurity
Free
Port Number Lookup
Look up port numbers by name or number with security notes.
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cybersecurity
Free
Private
Port Reference
Reference table of common network ports and protocols.
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cybersecurity
Free
Private/Public IP Checker
Check if an IP address is private, public, or reserved.
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cybersecurity
Free
Public Key Extractor
Extract public key from X.509 certificate.
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cybersecurity
Free
Private
Public vs Private Key Demo
Understand how public and private keys work together in asymmetric cryptography.
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cybersecurity
Free
Private
Rail Fence Cipher Demo
Interactive Rail Fence cipher — write in zigzag, read by rows.
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cybersecurity
Free
Private
Random Base64 Generator
Generate cryptographically secure random Base64 strings.
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cybersecurity
Free
Private
Random Bytes Generator
Generate cryptographically secure random bytes displayed in multiple formats.
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cybersecurity
Free
Private
Random Hex Generator
Generate cryptographically secure random hex strings.
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cybersecurity
Free
Private
Referrer Policy Generator
Generate Referrer-Policy headers.
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cybersecurity
Free
Private
ROT13 Demo
Interactive ROT13 cipher demonstration — a special case of the Caesar cipher.
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cybersecurity
Free
Private
RSA Concept Demo
See RSA key generation, encryption, and decryption with small primes.
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cybersecurity
Free
Private
RSA Key Pair Generator
Generate RSA-2048 or RSA-4096 key pairs for encryption or digital signatures.
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cybersecurity
Free
Private
RSA-OAEP Decryption
Decrypt ciphertext with RSA-OAEP private key.
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cybersecurity
Free
Private
RSA-OAEP Encryption
Encrypt plaintext with RSA-OAEP public key.
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cybersecurity
Free
Private
RSA-PSS Signature
Create a digital signature with RSA-PSS.
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cybersecurity
Free
Private
RSA-PSS Verify
Verify an RSA-PSS digital signature.
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cybersecurity
Free
Private
Salt Demonstrator
See how salting changes password hashes and defeats rainbow tables.
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cybersecurity
Free
Private
Salt Generator
Generate cryptographically secure random salts for password hashing.
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cybersecurity
Free
Private
scrypt Password Hash Generator
Hash passwords with scrypt - memory-hard key derivation.
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cybersecurity
Free
Private
Secure Cookie Generator
Generate secure Set-Cookie headers.
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cybersecurity
Free
Private
Secure Random Token Generator
Generate cryptographically secure random tokens for API keys, session IDs, and more.
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cybersecurity
Free
Private
Security Headers Analyzer
Analyze HTTP security headers for best practices.
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cybersecurity
Free
Private
SHA-1 Hash Generator
Generate a SHA-1 hash of any text, entirely in your browser. ⚠️ SHA-1 is a legacy algorithm and should NOT be used for modern security purposes (digital signatures, certificate validation, or password hashing). It is provided here for educational reference and legacy compatibility checking.
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cybersecurity
Free
Private
SHA-224 Hash Generator
Generate a SHA-224 hash of any text, entirely in your browser.
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cybersecurity
Free
Private
SHA-256 Hash Generator
Generate a SHA-256 hash of any text, entirely in your browser.
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cybersecurity
Free
Private
SHA-384 Hash Generator
Generate a SHA-384 hash of any text, entirely in your browser.
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cybersecurity
Free
Private
SHA3-256 Hash Generator
Generate a SHA3-256 hash of any text, entirely in your browser.
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cybersecurity
Free
Private
SHA3-512 Hash Generator
Generate a SHA3-512 hash of any text, entirely in your browser.
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cybersecurity
Free
Private
SHA-512 Hash Generator
Generate a SHA-512 hash of any text, entirely in your browser.
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cybersecurity
Free
SSL Certificate Checker
Check SSL/TLS certificate status for any domain — issuer, expiry, and chain details.
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cybersecurity
Free
Private
Strong Password Generator
Generate high-entropy passwords that resist brute-force and dictionary attacks.
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cybersecurity
Free
Private
Subnet Calculator
Calculate subnet details from CIDR notation.
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cybersecurity
Free
Subnet Mask Calculator
Convert between subnet mask, CIDR prefix, and wildcard mask.
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cybersecurity
Free
Private
Symmetric vs Asymmetric Demo
Compare symmetric and asymmetric encryption side by side.
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cybersecurity
Free
Private
Unicode Encoder/Decoder
Convert text to Unicode code points (U+XXXX) and back, entirely in your browser.
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cybersecurity
Free
Private
URL Decoder
Encode and decode URL data, entirely in your browser.
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cybersecurity
Free
Private
URL Encoder
Encode and decode URL data, entirely in your browser.
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cybersecurity
Free
Private
URL Security Analyzer
Analyze URLs for security issues.
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cybersecurity
Free
Private
Vigenère Cipher Demo
Interactive Vigenère cipher — a polyalphabetic substitution cipher.
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cybersecurity
Free
X.509 Certificate Viewer
View detailed X.509 certificate information.
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