A local-first blockchain explorer built for Anvil and other local Ethereum networks.
Inspect blocks, transactions, and addresses — then simulate and execute smart contract calls — all from your browser.

👉 Try it here

ethui explorer combines the essentials of a blockchain explorer with the power of a local execution environment.
It’s designed for developers who need to see everything on their chain and interact with it directly, without leaving the browser.

• 🔍 Explore Everything
  • Navigate blocks, transactions, and addresses with detailed decoding.
  • Inspect calldata, events, and execution traces from local or remote RPCs.
• 🧱 Contract Editing
  • Input or modify ABIs directly in the contract page using the Edit ABI button.
  • Decode transaction data instantly after ABI update.
• ⚡ Direct Executions
  • Execute contract functions in real time through your connected wallet.
  • Works seamlessly with local RPCs for fast, reproducible testing.
• 🧪 Simulations
  • Dry-run any transaction before sending it — validate outcomes instantly.
  • Ideal for debugging and verifying contract behavior pre-deployment.
• 🔌 RPC Connect
  • Point the explorer to any Ethereum-compatible endpoint (optimized for Anvil).
• 🪶 Local-First
  • All computation happens in your browser. No remote indexing, no data sharing.

1. Connect to your RPC
   • Input your RPC URL (e.g. http://localhost:8545).
   • Best experience on Anvil.
2. Explore the chain
   • Browse blocks, transactions, and addresses.
   • Drill into transaction details and decoded contract calls.
3. Edit ABIs
   • On any contract page, click Edit ABI → paste your ABI to enable decoding and interaction.
4. Simulate or Execute
   • Run read and write calls directly.
   • Choose between simulation (dry-run) or execution (wallet broadcast).

anvil --port 8545