Encode & decode strings, bytes, and integers to Base62

Base62 is ideal for URL shortening, creating readable codes, and compact data representation, because it compresses large values into shorter, alphanumeric strings, maximizing space efficiency and readability.

npm install @sindresorhus/base62

import base62 from '@sindresorhus/base62';

const encodedString = base62.encodeString('Hello world!');
console.log(encodedString);
//=> '8nlogx6nlNdJhVT24v'

console.log(base62.decodeString(encodedString));
//=> 'Hello world!'

console.log(base62.encodeString('🦄'));
//=> '95s3vg'

console.log(base62.encodeInteger(1337));
//=> 'LZ'

It uses the most common alphabet for Base62: 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz

Encodes a string to a Base62 string.

Decodes a Base62 encoded string created with encodeString() back to the original string.

Encodes bytes to a Base62 string.

Decodes a Base62 string created with encodeBytes() back to bytes.

Encodes a non-negative integer to a Base62 string.

Decodes a Base62 string to an integer.

Encodes a non-negative bigint to a Base62 string.

Decodes a Base62 string to a bigint.