JSON formatter / validator
Base64 encode / decode
SHA-256 hash (WebCrypto)
UUID v4 generator
Epoch ⇄ date converter
JWT decoder (no verification)
Support the DevKit — on-chain tip jar pay what it's worth to you
The tools stay free and private. If you want to support hosting & new tools, send any amount on Ethereum, Base, Arbitrum, Optimism or Polygon:
0x966471ae440dD09D80771f626e5b986e5c8fB5c1
Open in wallet (EIP-681)
Daily crypto price snapshot (auto-refreshed by CI): market-daily.json