Hey everyone, I just built an online tool to help users do Bitcoin RBF (Replace-By-Fee) transactions.

  - Transaction data is fetched via the mempool.space API

  - Right now it only supports RBF; I plan to add more features later (e.g., Inscription and Runes support)

The site relies on browser BTC wallets for signing. Currently supported:

    OKX Wallet, UniSat, Bitget Wallet, Leather, Xverse, Magic Eden

The site is not open-source yet, but it displays the PSBT and wallets also show the transaction details before signing, so you can verify the transaction content before approving.

If you are interested in using it, please try it and share feedback (features, UI, flow, error messages, etc.). Also let me know what else I should add to the intro.

Thanks!