# PSBT Combiner & Finalizer

> Understand combining signatures and preparing a transaction for extraction.

Mode: Runs locally.

## Supported behavior

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

## Security and 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.

[Security model](https://qbitcoin.live/security/index.md) · [QBitcoin home](https://qbitcoin.live/index.md)