Free Web3 Tools.
No sign-up. No tracking.
A fast, security-focused toolkit for crypto users and developers. Every tool runs entirely in your browser — we never see your keys, your data, or you.
Works across every major EVM chain
- Ethereum
- BNB Chain
- Base
- Arbitrum
- Polygon
One toolkit. Every chain.
The core toolkit, built to be fast, free, and honest about what they do with your data — which is nothing.
Token Approval Checker & Revoker
Find every token approval an address has ever granted, spot the risky ones, and revoke them — no wallet connection required just to check.
ETH Unit Converter
Convert between Wei, Gwei, and ETH live as you type — no rounding surprises when you're reading a contract or a receipt.
ABI Encoder / Decoder
Encode function calls into calldata, or decode raw calldata back into readable arguments against any ABI.
Multi-Chain Gas Tracker
Live gas prices across five chains, auto-refreshed, with real cost estimates for transfers, swaps, and NFT mints.
Address Tools
Validate any EVM address, convert it to checksummed form, and generate a scannable QR code — all client-side.
Smart Contract Generator
Spin up ERC-20, ERC-721, and ERC-1155 starter contracts from audited patterns via a simple guided form.
From the Store
Digital products for Web3 devs — some free, some priced and paid for directly in crypto.
From the Blog
Notes on Web3 tooling, security, and everything else we build here.
September 15, 20264 min read
The Safest Ways to Earn From Crypto in 2026 — Ranked by Real Risk (With Honest Numbers)
Staking, lending, liquidity pools — ranked from safest to riskiest with real 2026 yields. The honest rule: if it pays over 10-15%, ask where the money comes from.
September 14, 20264 min read
The 5 Biggest Crypto Hacks and Scams of 2026 (So Far) — and How Each One Actually Worked
Over $1.3B lost to crypto hacks and scams in H1 2026. From the Kelp DAO exploit to address poisoning, here's how each attack worked — and how to avoid them.
Why Web3Codes
Built on a simple premise: security tooling should be free, transparent, and never ask for more trust than it needs.
100% Non-Custodial
We never ask for a seed phrase or private key — full stop. Every tool runs client-side, so your assets and signing keys never leave your own wallet.
No Sign-Up, No Tracking
No accounts, no email capture, no analytics pixels following you around. Open a tool and start using it — that's the whole flow.
Built for Every Chain
Ethereum, BNB Chain, Base, Arbitrum, Polygon, and more. One consistent toolkit that works wherever your assets actually live.
Approved a token you don't remember?
Old approvals are the #1 way wallets get drained — a spender you approved months ago can still move your tokens today. Check your address in seconds, free, no wallet connection required to look.