How to Check if a Text String is Base 64 Encoded in Node.js

If we know plain text strings are Base64 encoded, we know that content can travel over text-based mediums.

Using the below Node.js code, we can take advantage of a free API that rapidly checks text strings for base64 content. This can act as a quick & secure validation step before moving text data from one location to another.

We can structure our API call in two quick steps. That starts with installing the SDK; we can do so either by running the following command:

npm install cloudmersive-convert-api-client --save

Or by adding the following snippet to our package.json:

"dependencies": {
    "cloudmersive-convert-api-client": "^2.6.3"
  }

Finally, we can copy the ready-to-run code below into our file and authorize our request with a free-tier API key (these allow up to 800 API calls per month & can be obtained by registering a free account on the Cloudmersive website):

var CloudmersiveConvertApiClient = require('cloudmersive-convert-api-client');
var defaultClient = CloudmersiveConvertApiClient.ApiClient.instance;

// Configure API key authorization: Apikey
var Apikey = defaultClient.authentications['Apikey'];
Apikey.apiKey = 'YOUR API KEY';



var apiInstance = new CloudmersiveConvertApiClient.EditTextApi();

var request = new CloudmersiveConvertApiClient.Base64DetectRequest(); // Base64DetectRequest | Input request


var callback = function(error, data, response) {
  if (error) {
    console.error(error);
  } else {
    console.log('API called successfully. Returned data: ' + data);
  }
};
apiInstance.editTextBase64Detect(request, callback);

Our response will provide a Boolean declaring if the text string is in Base64. That’s all there is to it!