Nostr Onchain
Web app

nostrtx

Bitcoin transactions for Nostr keys. Paste an npub, get its taproot address, build an unsigned PSBT, sign it on your hardware — never in the browser — and broadcast. Multisig included. Entirely client-side: no backend, no custody, no account.

Open nostrtx Source

Features

npub → BitcoinEvery Nostr key is a taproot address. Send sats to anyone you follow.
Unsigned PSBTs onlyThe app never touches a private key. Sign on the Pocket Signer via USB, bridge, or SD card.
MultisigBuild shared taproot wallets with co-signers, collect signatures, finalize, broadcast.
Fee controlSlow / normal / fast presets from the mempool, or enter a custom sat/vB rate — with a live cost preview before you build.
Coin controlPick exactly which UTXOs to spend.
Follows built inYour Nostr follow list is the address book.

How to use

  1. Open nostrtx.com and log in (NIP-07 extension or bunker link).
  2. Load your wallet — your npub's taproot address and coins appear.
  3. Enter a recipient (npub or Bitcoin address), amount, and fee rate.
  4. Build the unsigned PSBT and sign it on your device.
  5. Paste the signed transaction back and broadcast.

FAQ

Where are my keys?

Not here. nostrtx only ever sees public keys and signed transactions. Signing happens on your hardware or in your NIP-07 extension.

Can I use it without the hardware signer?

Yes — any NIP-07 extension or NIP-46 bunker works for Nostr login, and you can sign PSBTs in wallets like Sparrow by importing the PSBT.