Where can I get free AV1 decoder software? If there were a great GUI, it would be even better!

When I am developing the AV1 algorithm, I often need to use AV1 decoding software to analyze the stream and help me iterate the algorithm quickly. However, unfortunately, all the AV1 decoder software I know is chargeable and expensive. So I would like to ask if anyone has a good AV1 decoder software to share!