SendCheck tool validates crypto addresses in-browser before you hit send

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A solo developer known as Pennyforge has launched SendCheck, a free browser-based tool designed to verify cryptocurrency addresses before funds are transferred. The tool checks address format, EIP-55 checksum validity, transaction history, and whether the destination is a wallet or smart contract. It also identifies USDC token variants and maintains a per-exchange, per-token, per-network support matrix for major platforms including Coinbase, Binance, and Kraken. All checks run client-side against public RPC endpoints, meaning no address data is sent to external servers. A free tier allows three checks per day, while unlimited checks cost a one-time fee of 0.50 USDC, verified on-chain.

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