A web interface to build and sign Ethereum raw transactions offline.
- RLP encoding of transactions
- Local private key management (never stored on disk)
- Offline signing without sending to the network
- Live preview of the serialized transaction
- React (TypeScript)
- ethers.js
- Vite
- ESLint + Prettier
git clone https://github.com/yourusername/transaction-builder.git
cd transaction-builder
yarn
yarn dev
Open http://localhost:5173 in your browser.
Fill in transaction fields: nonce, to, value, gas, data.
Paste your private key (only stored in memory).
Click Sign Transaction.
Copy the raw signed transaction hex.