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angelo-v/jwt-decode.sh

Last active April 30, 2024 17:09
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Decode a JWT via command line
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jwt-decode.sh
# will not work in all cases, see https://gist.github.com/angelo-v/e0208a18d455e2e6ea3c40ad637aac53#gistcomment-3439904
function jwt-decode() {
sed 's/\./\n/g' <<< $(cut -d. -f1,2 <<< $1) | base64 --decode | jq
}
JWT=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiYWRtaW4iOnRydWV9.TJVA95OrM7E2cBab30RMHrHDcEfxjoYZgeFONFh7HgQ
jwt-decode $JWT
@kloverde25
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what about basenc it's part of coreutils ?

basenc -d --base64url -i <your_file> | jq

@philpennock
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Sure; coreutils 8.31 and newer, so was not in stable OS releases at the time of the gist. Today, I'd recommend basenc.

@philpennock
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Oh, beware though that basenc complains about missing = signs, even in --base64url mode, so you'll also need to suppress stderr.

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