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michaelphipps/base64url.js

Created March 18, 2023 08:26
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Base64url encoding and decoding functions
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base64url.js
const base64url = {
encode: (data) => {
let base64 = btoa(String.fromCharCode(...data));
return base64.replace(/=/g, '').replace(/\+/g, '-').replace(/\//g, '_');
},
decode: (base64url) => {
let base64 = base64url.replace(/-/g, '+').replace(/_/g, '/');
while (base64.length % 4) base64 += '=';
return Uint8Array.from(atob(base64), c => c.charCodeAt(0));
}
};
@michaelphipps
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Because it's not like you can't find this in 1 million places already...

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