Cryptography Tools

Encrypt and decrypt securely with browser-based tools. Work with AES/RSA, ciphers and keys while keeping your data private.

19 tools available

Blockchain Tools 8

ENS Resolver

Free ENS resolver to lookup Ethereum Name Service domains and wallet addresses. Convert ENS names to addresses and reverse lookup addresses to ENS names instantly.

Blockchain Tools
Keccak SHA3 Hasher

Generate Keccak-256, Keccak-512, SHA3-256, SHA3-512 hashes online. Free Ethereum-compatible hash tool for smart contracts and blockchain development.

Blockchain Tools
ABI Encoder / Decoder

Encode and decode Ethereum smart contract function call data. Convert ABI signatures to calldata and decode transaction input data.

Blockchain Tools
Checksum Address Converter

Convert Ethereum addresses to EIP-55 checksum format. Validate and format ETH, BSC, Polygon addresses with mixed-case checksums for error detection.

Blockchain Tools
EVM Vanity Address Generator

Generate custom EVM vanity addresses with personalized prefix/suffix. Create unique Ethereum, BSC, Polygon addresses. Fast, secure, browser-based tool.

Blockchain Tools
EVM Transaction Decoder

Decode EVM raw transaction hex for Ethereum, BSC, Polygon, Arbitrum, Optimism, Avalanche. View transaction details, gas, value, data, and signatures.

Blockchain Tools
BIP39 Mnemonic

Generate and validate BIP39 mnemonic seed phrases. Create secure 12-24 word recovery phrases for crypto wallets. Convert mnemonic to seed hex instantly.

Blockchain Tools
Crypto Address Validator

Validate cryptocurrency addresses for Bitcoin, Ethereum, Solana, Cardano, and 10+ blockchains. Auto-detect address format and verify validity instantly.

Blockchain Tools

Developer Tools 11

Base32 Encoder/Decoder

Free online Base32 encoder and decoder tool. Encode text to Base32 or decode Base32 to text instantly. Supports RFC 4648 standard Base32 encoding with optional padding. Perfect for developers working with data encoding, QR codes, and case-insensitive encoding systems.

Developer Tools › Encoding
Base58 Encoder/Decoder

Free online Base58 encoder and decoder tool. Encode text to Base58 or decode Base58 to text instantly. Uses Bitcoin alphabet without confusing characters (0, O, I, l). Perfect for developers working with cryptocurrencies, blockchain, Bitcoin addresses, and human-readable encoding.

Developer Tools › Encoding
Base64 Encoder/Decoder

Free online Base64 encoder and decoder tool. Encode text to Base64 or decode Base64 to text instantly. Supports UTF-8, ASCII, URL-safe encoding and multiple character sets. Perfect for developers working with APIs, data encoding, and web development.

Developer Tools › Encoding
Base85 Encoder/Decoder

Free online Base85 (Ascii85) encoder and decoder tool. Encode text to Base85 or decode Base85 to text instantly. More efficient than Base64 with 25% better compression. Perfect for developers working with PDF encoding, binary data compression, email attachments, and space-efficient encoding.

Developer Tools › Encoding
Bcrypt Hash Generator

Free online Bcrypt hash generator and password encryption tool. Generate secure bcrypt hashes for password storage or verify passwords against existing hashes. Supports customizable salt rounds (cost factor) for optimal security. Perfect for developers implementing secure authentication systems.

Developer Tools › Encoding
Hex Encoder/Decoder

Free online Hexadecimal (Hex) encoder and decoder tool. Convert text to hex or decode hex to text instantly. Supports multiple hex formats: plain, 0x prefix, space-separated. Perfect for developers working with binary data, debugging, color codes, and low-level programming.

Developer Tools › Encoding
JWT Encoder/Decoder

Free online JWT (JSON Web Token) encoder and decoder tool. Create JWT tokens or decode and analyze existing tokens instantly. View header, payload, signature, and claims information. Supports HMAC algorithms (HS256, HS384, HS512). Perfect for developers working with authentication, OAuth, and API security.

Developer Tools › Encoding
MD5 Hash Generator

Free online MD5 hash generator and MD5 encrypt tool. Generate MD5 hash from text instantly. Create 128-bit MD5 checksums for data integrity verification, file comparison, and development testing. Perfect for developers needing quick MD5 hash generation.

Developer Tools › Encoding
SHA-1 Hash Generator

Free online SHA-1 hash generator and SHA-1 encrypt tool. Generate SHA-1 hash from text instantly. Create 160-bit SHA-1 checksums for data integrity verification and development. Fast, client-side SHA-1 hashing.

Developer Tools › Encoding
SHA-256 Hash Generator

Free online SHA-256 hash generator and SHA-256 encrypt tool. Generate SHA-256 hash from text instantly. Create 256-bit SHA-256 checksums for blockchain, Bitcoin, SSL certificates, and secure data integrity. Industry-standard cryptographic hash function.

Developer Tools › Encoding
SHA-512 Hash Generator

Free online SHA-512 hash generator and SHA-512 encrypt tool. Generate SHA-512 hash from text instantly. Create 512-bit SHA-512 checksums for maximum security, data integrity, and cryptographic applications. Most secure SHA-2 family algorithm.

Developer Tools › Encoding