15 Best Free Crypto Tools for Developers in 2026
Whether you're building a DeFi app, an ordinals marketplace, or a crypto portfolio tracker, these free tools will accelerate your development.
Blockchain Explorers
- Mempool.space โ Best Bitcoin mempool visualizer and block explorer
- Etherscan โ Ethereum blockchain explorer with API access
- Blockstream.info โ Clean Bitcoin explorer with REST API
Development Frameworks
- Hardhat โ Ethereum development environment for testing and deployment
- Foundry โ Fast Solidity toolkit (forge, cast, anvil)
- Remix IDE โ Browser-based Solidity editor and compiler
Wallet & API Tools
- Alchemy โ Node infrastructure with free tier (300M compute units/mo)
- The Graph โ Decentralized API for querying blockchain data
- Chainlink โ Oracle network for real-world data in smart contracts
Security
- OpenZeppelin โ Audited smart contract libraries
- Slither โ Static analysis for Solidity vulnerabilities
Bitcoin Ordinals Tools
- ordinals.best โ Rate and rank ordinal collections
- ordinals.pics โ Visual ordinals gallery
- Hiro API โ Bitcoin API with ordinals support
๐ช Get Started with Crypto
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