base64(data) Last updated: 23. Oct 2026

Converts data to base64 encoded string.

Parameters

Name	Type	Description
data	string or byte[]	Data to encode: a string or a byte array (byte[]), for example from textEncode. A string is converted to UTF-8 bytes first. A plain JavaScript array of numbers is NOT treated as bytes — [1, 2, 3] is encoded as the text "1,2,3". With several arguments, each one is encoded separately.

Name

Type

Description

data

string or byte[]

Data to encode: a string or a byte array (byte[]), for example from textEncode.

A string is converted to UTF-8 bytes first. A plain JavaScript array of numbers is NOT treated as bytes — [1, 2, 3] is encoded as the text "1,2,3". With several arguments, each one is encoded separately.

Returns

Base64 encoded string.

Example

Code example (JS)

JS is normal JavaScript either running in the browser or on the Docly™ server.

let bytes = docly.textEncode("Hello", "utf8");   // byte[]
write(docly.base64(bytes));                      // SGVsbG8=

write(docly.base64("Hello"));                    // SGVsbG8= — strings are encoded as UTF-8

Output

The JS code above produces the output shown below:

SGVsbG8=SGVsbG8=