@ethui.bsky.social
Fork any network with ethui stacks
Test against mainnet protocols without gas costs.
Fork Ethereum mainnet, Sepolia, or any EVM chain. Just provide upstream RPC.
Interact with real Uniswap, Aave, etc. No mock deployments needed.
One-click private testnets: stacks.ethui.dev
Anvil is different from production blockchains
It can override state, mint ETH, impersonate accounts, create snapshots, and revert
These features don't exist in real chains. User-facing wallets aren't built for this.
ethui is built specifically for anvil's testing capabilities
Need a test wallet without password prompts?
ethui supports plaintext wallets that store your test mnemonic without encryption
No password needed. Works with the default anvil mnemonic:
test test test test test test test test test test test junk
Only for test funds. Never use with real assets.
💬 Calling ethui stacks early users - we want feedback:
📊 Use case?
🐛 Bugs?
✨ Feature requests?
🔧 Self-hosting or hosted?
Future work: subgraph support (trickiest part: anvil reverts).
If you have experience with anvil + subgraph, we need your input.
Open source: github.com/ethui/stacks
Tired of juggling inline arrays and tuples when interacting with contracts?
ethui renders dynamic forms based on ABI inputs
Handle complex fields without cramming everything into a single text box. Type "1 ether" and it parses to correct uint256.
Need to interact with contracts during local development?
Most tools: Deploy to testnet, verify source code on etherscan, then interact
ethui: Interact with contracts directly from compilation artifacts
No publishing. No verification. Fully local and private.
What did you ship in January?
New contract deployed? Feature launched? Bug fixed? Contribution merged?
Share what you built this month
ethui's transaction preview is also a transaction editor
Tweak transaction params before submitting and see simulation update in real-time
Test how your transaction reacts to different parameters without submitting multiple times
Edit, simulate, adjust, then submit
🎯 ethui stacks use cases (from a year of use at Subvisual):
1️⃣ Internal QA testing: persistent test environment
2️⃣ User testing: instant wallet funding with anvil_setBalance
3️⃣ Protocol integration: fork mainnet, use real Uniswap/Aave instead of mocks
What's your use case?
Try it: stacks.ethui.dev
🔧 ethui stacks overview:
• Private persistent anvil instance
• Authenticated RPC + private API key
• Unique chain ID (replay protection)
• All cheatcodes: setBalance, impersonate, snapshots
• Fork any EVM chain
• Built-in explorer
Local anvil power, cloud persistence.
Try it: stacks.ethui.dev
ethui detects whether a chain is anvil-based using the anvil_nodeInfo RPC endpoint
When detected, dedicated sync continuously tracks the chain head and correctly identifies:
• New blocks
• Reverts to prior snapshots
• Full restarts
Real-time sync with your anvil development workflow
💡 Testnet problems ethui stacks solves:
❌ Distributing gas to testers
❌ Broken/incompatible mocks (different MockUSDC everywhere)
❌ Slow deploy cycles
❌ Network congestion
✅ anvil_setBalance - instant funding
✅ Fork mainnet - real protocols
✅ Instant rollbacks
stacks.ethui.dev
The testnet pain points (gas distribution, interoperability, and slow feedback) have been solved.
Free to try, open source, self-hostable.
Read the full announcement 👇
ethui.dev/blog/stacks
#EthereumDev #Testnets #DeveloperTools
🚀 Introducing ethui stacks: one-click private testnets
We've been using this internally for the past year. Now it's yours.
Create on-demand Ethereum testnets with: cloud-persistent anvil with unique chain IDs, private API keys, all cheatcodes, fork any network, built-in explorer.
What's in your Ethereum dev stack right now?
Drop your setup below:
• Local node (anvil, hardhat, ganache?)
• Testing tools
• Wallet you're using
• IDE
Curious what other devs are running
Restarted or reverted your anvil chain, and now Metamask won't sign transactions?
Most wallets cache nonces locally. When anvil resets, their cached nonce no longer matches the chain.
ethui calculates nonces from scratch every time
Works correctly with anvil snapshots, reverts, and full restarts
ethui automatically uses anvil_impersonateAccount when submitting transactions to anvil chains
This prevents replay attacks when testing with mainnet chain IDs
No signatures from your private keys. No unlocking wallets.
Security feature that happens to be convenient for development
Most wallets force you to unlock when you first open them
ethui defers password input until a signature is actually needed
Multiple wallets, various types, unlock only when required
Cached in-memory for a few minutes using secure isolation to prevent leaks
What's your main Ethereum dev goal for 2026?
A) Ship my first dapp
B) Contribute to open source
C) Master smart contract security
D) Build multi-chain applications
Vote below and tell us what you're working on 👇
2025 for ethui:
— Improved local dev workflows
— Added simulation features
— Expanded multi-wallet support
— Grew the contributor community
Thanks to everyone who used ethui, filed issues, and contributed code this year.
More coming in 2026!
Transaction confirmations slow down your dev workflow
Every test requires a manual review. Every deployment adds friction.
ethui lets you skip transaction reviews in local dev
Test faster. Deploy faster. Iterate faster.
ethui's ABI explorer scans your compilation artifacts and gives you a UI to interact with contracts directly
No external tools. No manual setup. Just build and start testing
Fast feedback for local Ethereum development
What was your biggest web3 dev win in 2025?
Shipped a new dapp? Finally got multi-wallet testing working? Contributed to an open source project?
Drop it below. We want to hear what you built this year
Test your dapp from any wallet's perspective with ethui's impersonator wallets.
No private key. Input any address and interact as if you own it.
Works with anvil chains (local/remote): submits unsigned transactions via anvil's impersonation.
Perfect for testing without accessing actual wallets.
Why local-first for Ethereum dev?
Fast and reproducible environment. No network delays. Quick feedback loops.
ethui integrates with anvil and forge to give you a complete local environment
Build and test contracts without waiting for network confirmations
ethui.dev
Interact with contracts using ethui Explorer
Connect to Anvil chains (local/remote), see transaction history, interact with contracts
ABIs from your file system automatically decode contracts when connected to ethui wallet
explorer.ethui.dev or clone from GitHub
Testing on multiple chains at once?
Most devs: Switch networks manually, lose context, restart tests
ethui: Connect to multiple chains simultaneously, no switching needed
Your local dev environment shouldn't fight you
🔮 Transaction simulations
Preview txs before sending. Uses revm (same as forge) locally—no 3rd parties, works on Anvil.
Debug without updating state.
ethui.dev/docs/features/simulations
#EthereumDev #Web3 #DevTools
Why ethui is desktop-native:
✓ Not browser-sandboxed
✓ System-wide reach
✓ Better performance
✓ Works with any browser
Built for developers who need real tools, not browser extensions.
ethui.dev
#EthereumDev #DevTools #Web3
Testing with multiple wallets?
Most require separate browser profiles.
ethui: setup multiple wallets and manually switch between them seamlessly. Connect different chains simultaneously.
No browser profile hacks.
ethui.dev/docs
#EthereumDev #DevTools #Web3
