how to decode jwt token with power automate

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Posted on by LuisBa

Hello, I need to decode one jwt token with power automate, like this:

thank you

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v-bofeng-msft Microsoft Employee on at

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Hi @LuisBa ，

Please try:

json(if( equals(mod(length(split(variables('JWT Code'),'.')[0]),4),0), decodeBase64(split(variables('JWT Code'),'.')[0]), decodeBase64(concat(split(variables('JWT Code'),'.')[0],take('===',sub(4,mod(length(split(variables('JWT Code'),'.')[0]),4))))) ))
json(if( equals(mod(length(split(variables('JWT Code'),'.')[1]),4),0), decodeBase64(split(variables('JWT Code'),'.')[1]), decodeBase64(concat(split(variables('JWT Code'),'.')[1],take('===',sub(4,mod(length(split(variables('JWT Code'),'.')[1]),4))))) ))

Best Regards,

Bof

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LuisBa 8 on at

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Hi @v-bofeng-msft many many thanks it's working, really many thanks.

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CWilkinson 25 on at

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Hi @v-bofeng-msft ,

I wasn't aware you were able to decode using a variable in Power Automate.

In theory, are you able to encode a JWT using Power Automate if you know the header, payload and security key? (pre-defined variables).

If so, are you able to provide any assistance with this please?

Thanks,

Connor

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rjwales on at

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Did you ever manage to figure out how to do this?

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CWilkinson 25 on at

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Hi,

Yes, but it wasn't something we could do in Power Automate alone, we had to develop it in Azure Runbook Automation and use a Power Automate to capture the token and use that inline with the service we needed.

Thanks,

CWilkinson

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CU26090717-1 2 on at

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Thank you for this post. It was a real life saver for me.

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