41+ Free Developer Tools · No Backend · No Tracking
The Ultimate
Chain Matrix Toolkit
Professional blockchain development tools. Hash generators, Ethereum validators, Bitcoin converters, Solana utilities — all running client-side in your browser.
41+
Dev Tools
5
Categories
0
Backend Calls
100%
Free & Open Source
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Tool Categories
Everything you need to build, debug, and ship blockchain applications.
Hash Tools
SHA256, SHA512, MD5, Keccak256, RIPEMD160 & more
6 tools available
Ethereum Tools
Address validator, ETH/Wei converter, ABI tools & more
12 tools available
Bitcoin Tools
Address validator, Bech32, Base58, BTC/Satoshi converter
4 tools available
Solana Tools
Address validator, Lamports converter, Program ID validator
3 tools available
Utility Tools
Base64, JSON, UUID, Password, QR Code, Timestamp & more
11 tools available
Most used
Popular Tools
The most frequently used tools by our developer community.
HOT
SHA256 Hash Generator
Generate SHA-256 cryptographic hashes. Used in Bitcoin proof-of-work and data integrity verification.
HOT
Ethereum Address Validator
Validate Ethereum addresses with full EIP-55 checksum verification and format checking.
ETH ↔ Wei Converter
Convert between ETH, Wei, Gwei, Finney, Szabo and all Ethereum denominations instantly.
HOT
Keccak256 Hash Generator
Generate Keccak-256 hashes used by Ethereum for addresses, event signatures, and function selectors.
JSON Formatter
Pretty-print, validate, and minify JSON data with syntax highlighting and error detection.
Function Selector Calculator
Compute the 4-byte function selector (method ID) from any Ethereum function signature.
Bitcoin Address Validator
Validate Legacy (P2PKH), P2SH, and Bech32 (SegWit) Bitcoin addresses instantly.
UUID Generator
Generate RFC 4122-compliant UUIDs v1, v4, and v5 with bulk generation support.
Just launched
Recently Added
NEW
Gas Fee Calculator
Estimate total transaction cost in ETH and USD at any gas price and limit.
NEW
Lamports Converter
Convert between SOL and Lamports (1 SOL = 1,000,000,000 Lamports) instantly.
NEW
QR Code Generator
Generate QR codes for wallet addresses, URLs, and text. Download as PNG.
NEW
ABI Decoder
Decode transaction calldata using an ABI definition to extract function arguments.
Developer resources
Featured Resources
Curated references for blockchain developers.
EIP-55 — Mixed-case Checksum
Official Ethereum Improvement Proposal for address checksum encoding.
Ethereum ABI Specification
The ABI encoding specification for Solidity and EVM function calls.
Bech32 Address Format
Bitcoin wiki article explaining Bech32 SegWit address encoding.
Solana Account Model
Understanding Solana accounts, program addresses, and public keys.
Keccak-256 Specification
Technical reference for the Keccak-256 hashing algorithm used in Ethereum.
BIP-39 — Mnemonic Seeds
Bitcoin Improvement Proposal for mnemonic code generation for deterministic keys.
Got questions?
Frequently Asked Questions
100% private. All computations happen entirely in your browser using JavaScript. No data is ever sent to any server. There is no backend, no analytics tracking, and no cookies. Your private keys, addresses, and data never leave your machine.
We use the native Web Crypto API (built into modern browsers) for SHA-1, SHA-256, and SHA-512. For algorithms not available natively — MD5, Keccak-256, and RIPEMD-160 — we use self-contained, auditable JavaScript implementations bundled with the site. No external CDN dependencies are used.
Yes! Once loaded, most tools work without an internet connection because all logic runs client-side. For the best offline experience, you can download the repository from GitHub and open the HTML files directly in your browser.
Yes, Chain Matrix is fully open source under the MIT license. We welcome contributions — whether it's new tools, bug fixes, improved UX, or documentation. Visit our GitHub repository to get started.
Our Ethereum tools implement the full EIP-55 standard for address checksum validation, validate hexadecimal format, 0x prefix, and exact 40-character length. For on-chain verification (e.g., confirming a contract is deployed at an address), you will still need an Ethereum node or provider like Infura or Alchemy.
Yes! Press / or Ctrl+K to open search, T to toggle dark/light mode, H to go home, and ESC to close any dialog.