AES Encryption & Decryption Tool
Encrypt and decrypt text using AES-GCM and AES-CBC (128, 192, 256-bit) client-side with native Web Cryptography API and automatic cryptographic IV generation.
Argon2 Hash Generator & Cost Estimator
Generate Argon2id, Argon2i, and Argon2d password hashes, tune memory cost (m), time cost (t), parallelism (p), and calculate GPU resistance metrics.
BIP-39 Mnemonic Seed Phrase Generator & Validator
Generate and validate cryptographically secure 12, 15, 18, 21, and 24-word BIP-39 mnemonic seed phrases with PBKDF2 seed derivation for Bitcoin and Web3 wallets.
CIDR Route Summarization & Supernetting Calculator
Aggregate multiple IP subnets into optimal CIDR supernet routes. Calculate bitwise binary common prefixes, wildcard masks, route table compression, and Cisco/Juniper configs.
CIDR Subnet Calculator
Calculate IPv4 subnets, network address, broadcast address, wildcard mask, and usable IP host ranges with instant CIDR prefix calculation.
Client-Side Image Steganography Tool
Conceal and extract secret messages inside PNG images using pure client-side Least Significant Bit (LSB) steganography with optional encryption.
Content Security Policy (CSP) Builder & Analyzer
Build, configure, and validate modern W3C Content Security Policy (CSP Level 3) HTTP response headers to defeat Cross-Site Scripting (XSS) and data exfiltration.
CORS Header Generator & Preflight Simulator
Configure and simulate Cross-Origin Resource Sharing (CORS) HTTP headers (Access-Control-Allow-Origin, Methods, Headers, Credentials, Max-Age) for APIs.
CVSS v3.1 Vulnerability Scoring Calculator
Calculate Common Vulnerability Scoring System (CVSS v3.1) Base Score, qualitative severity ratings, and generate official vector strings for security triage.
Diceware Passphrase Generator
Generate cryptographically secure, high-entropy, memorable passphrases using Diceware methodology directly in your browser. Free and secure tool by Toolzyo.
Diffie-Hellman Key Exchange Calculator & Simulator
Simulate the Diffie-Hellman cryptographic key exchange step-by-step. Calculate public keys, shared secret keys, modular exponentiation, and analyze the Discrete Logarithm Problem.
DKIM Key & DNS Record Generator
Generate secure RSA 1024/2048-bit DKIM keypairs and formatted DNS TXT records with automatic multi-string BIND chunking for email authentication.
DNSSEC Record Generator & Validator
Generate DNSSEC Delegation Signer (DS) resource records, calculate SHA-256 and SHA-384 key digests from DNSKEY public keys, and format registrar records.
Elliptic Curve Cryptography & Point Arithmetic Calculator
Interactive Elliptic Curve Cryptography calculator. Perform point addition, point doubling, scalar multiplication k*G via double-and-add over finite fields and real curves.
File Checksum Verifier
Free online file checksum verifier. Calculate and compare SHA-256, SHA-512, and SHA-1 checksums locally in-browser to verify software downloads and data integrity.
Hash Identifier
Identify the algorithm used to generate a hash. Supports MD5, SHA-1, SHA-256, bcrypt, and more based on length and characters.
HMAC Generator & Verifier
Generate and verify Hash-based Message Authentication Codes (HMAC-SHA256, HMAC-SHA512, HMAC-SHA1) with custom secret keys using Web Crypto API.
HSTS Header Generator & Preload Validator
Configure RFC 6797 HTTP Strict Transport Security (HSTS) headers, validate max-age durations, includeSubDomains directives, and Chrome/Firefox preload eligibility.
IP Reputation & Network Threat Analyzer
Analyze IPv4 and IPv6 addresses for RFC classification, bogon detection, DNSBL blacklist lookup syntax, and reverse DNS PTR threat intelligence.
Linux Permissions (chmod) Calculator
Calculate Linux/Unix file permissions, convert octal notation (e.g. 755, 644, 4755) to symbolic rwxr-xr-x notation, and configure special bits (SUID, SGID, Sticky).
Password Generator Pro
Free, fast, and secure password generator pro tool for your everyday needs.
Password Hash Work Factor & Cracking Cost Calculator
Calculate server verification latency, attacker cracking speeds, and hardware costs across Argon2id, bcrypt, PBKDF2, and scrypt against modern GPU clusters.
PBKDF2 Key Derivation Tool
Derive cryptographic symmetric keys and password hashes using PBKDF2 with custom iterations, salt, hash functions (SHA-256, SHA-512), and key lengths.
Port Knocking Sequence & Firewall Rule Generator
Generate secure multi-port knocking sequences, timeout windows, knockd configuration files, and iptables/nftables firewall rules for hidden SSH access.
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