Densenet in the browser

Hello, I have a densenet model and I want to run it in the browser. Does anyone know any solutions I can use?

I tried onnx.js and I get the following error:

Uncaught (in promise) TypeError: cannot resolve operator 'Pad' with opsets: ai.onnx v9

I am converted my ConvNet model using opset v11 which I think is the latest but still I get the same error. It would be great if someone can help.