Base64 Utils

Utility module to perform various operations on a base64 string, has features to convert image to base64 string.

Release Notes

• Added support for conversion of images to base64 string.

Installation

 $ npm install base64-utils 

Usage

const base64Utils = require("base64-utils");
//or
import * as base64Utils from "base64-utils"

API

isValidBase64

Checks if the base64 string is valid.

base64Utils.isValidBase64("SGVsbG8gV29ybGQ"); //returns false

base64Utils.isValidBase64("SGVsbG8gV29ybGQ="); //returns true

getMimeType

Tries to read mimetype of a base64 string, returns mimetype if found, otherwise returns a empty string.

base64Utils.getMimeTypeBySignature("data:image/png;base64,iUgAAAAUAAAAF=="); //returns "image/png"

base64Utils.getMimeTypeBySignature("SGVsbG8gV29ybGQ="); //returns ""

To get MimeType by reading string, and seeing string pattern, this is currently only available for pdf, png, jpg and gif.

base64Utils.getMimeType("iUgAAAAUAAAAF=="); //returns "image/png"

base64Utils.getMimeType("SGVsbG8gV29ybGQ="); //returns ""

Conversion Methods from Base64

To Convert Base64 String to different data formats

//Convert Base64 to Buffer
base64Utils.base64ToBuffer("SGVsbG8gV29ybGQ="); 
//Convert Base64 to UTF8
base64Utils.base64ToUtf8("SGVsbG8gV29ybGQ=");
//Convert Base64 to Hex
base64Utils.base64ToHex("SGVsbG8gV29ybGQ="); 
//Convert Base64 to Binary
base64Utils.base64ToBinary("SGVsbG8gV29ybGQ=");   

Conversion Methods To Base64

To Convert different formats to base64 String

//Convert Base64 to Buffer
base64Utils.bufferToBase64(Buffer); 

Convert Image To Base64

To convert image to base64 encoded string

//Convert image to base64 asynchronously 
base64Utils.imageToBase64(imagePath).then(data => console.log(data));

//Convert image to base64 synchronously 
base64Utils.imageToBase64Sync(imagePath);