Append to CSV file

Hello, I made a GET request that gives me a text/csv response. However, i would like to append this to a already existing excel file. Is this possible? Thanks in advance/

Not directly from Postman, but it can work from Newman.

If you know JavaScript, you can write a custom script. I did a tutorial about a similar use-case:

You can not use external files directly in postman other than for data file. But a work around is to use the visualizer function. Add the below code in your test section

 //Assuming you have your csv content in the variable csv

a =`

        <input type="file" id="fileinput" />
        <pre id="ReadResult"></pre>
        <script type="text/javascript">
            function readSingleFile(evt) {
                //Retrieve the first (and only!) File from the FileList object
                var f =[0];
                if (f) {
                    var r = new FileReader();
                    r.onload = function (e) {
                        var contents =;
                        contents = contents + "\\n" + ${csv}
                        const blob = new Blob([contents], { type: 'text/plain' });
const a = document.createElement('a');
a.setAttribute('download', "fileName.csv");
a.setAttribute('href', window.URL.createObjectURL(blob));
                } else {
                    alert("Failed to load file");

            document.getElementById('fileinput').addEventListener('change', readSingleFile, false);




Now goto visualize tab:

enter image description here

Just upload the csv file you have , this will append the content to that file and ask where to save the file.

Thanks. But you have to manually pick a file and manually save it to your specified location. I was wondering if it was possible to instead make it search for kronos.csv in a pre-specified folder path, append the response body to that file and automatically save/override it in the same place. Thanks in advance

thats the only way of now from postman APP