base64 decode and then un-gzip / Simon Willison

Public

Edited

Mar 26, 2024

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viewof input = Inputs.textarea({

placeholder: "Paste in a base64 value representing gzipped data",

rows: 10

})

html`<pre>${await decodeAndUnzip(input)}</pre>`

async function decodeAndUnzip(base64String) {

// Decode the Base64 string to a Uint8Array

const binaryString = atob(base64String);

const bytes = new Uint8Array(binaryString.length);

for (let i = 0; i < binaryString.length; i++) {

bytes[i] = binaryString.charCodeAt(i);

}

// Unzip the bytes using the pako library

const unzipped = pako.inflate(bytes);

// Convert the unzipped bytes to a string

const decoder = new TextDecoder();

const result = decoder.decode(unzipped);

return result;

}

pako = import("https://unpkg.com/pako@2.1.0/dist/pako.esm.mjs?module")

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