Transactions & fees

PSBT Combiner & Finalizer

Understand combining signatures and preparing a transaction for extraction.

Runs locally

Security & privacy. Sensitive inputs and calculations stay on your device. No secrets are sent to the backend or saved in browser storage. Clear the form and result when finished. These key tools have not received an independent security audit; do not use it with real funds.

Use this tool

Runs on your device. No wallet secrets are sent to the server. These key tools have not received an independent audit; do not use with real funds.

Combine up to 5 compatible PSBTs. Finalization requires existing signatures and supported spending policies. This does not sign or broadcast.

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What this tool is for

Combining merges compatible PSBT information; finalizing constructs the required final spending data where possible. Neither step should silently authorize signing or network broadcast.

Supported behavior

Combine up to 5 compatible PSBTs. Finalization requires existing signatures and supported spending policies. This does not sign or broadcast.

Security & privacy

Sensitive inputs and calculations stay on your device. No secrets are sent to the backend or saved in browser storage. Clear the form and result when finished. These key tools have not received an independent security audit; do not use it with real funds.