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Uploading Local Files to Google Drive without Authorization using HTML Form

Uploading Local Files to Google Drive without Authorization using HTML Form

This is a sample script for uploading local file to Google Drive without the authorization using HTML form. A selected file in your local PC using HTML form is uploaded to Google Drive and saved to Google Drive.

When you use this, at first, please deploy Web Apps. The script is doPost() of following scripts.

Script : Google Apps Script

function doPost(e) {
  var data = Utilities.base64Decode(;
  var blob = Utilities.newBlob(data, e.parameters.mimetype, e.parameters.filename);
  var output = HtmlService.createHtmlOutput("<b>Done!</b>");
  return output;
  // return ContentService.createTextOutput("Done.") <--- Here, an error occurred.

Flow :

  • Retrieve data, filename and mimetype as, e.parameters.filename and e.parameters.mimetype, respectively.
  • Decode the data using Utilities.base64Decode().
  • Create blob using Utilities.newBlob().
  • Create the file in the root folder of Google Drive.

Script : HTML is the URL obtained when the Web Apps was deployed. Please replace it to your Web Apps URL. You can open this HTML for the browser of your local PC.

<!DOCTYPE html>

    <title>Sample script for uploading file to Google Drive without authorization</title>
    <script src=""></script>

    <form action="" id="form" method="post">
        Upload a file
        <div id="data"></div>
        <input name="file" id="uploadfile" type="file">
        <input id="submit" type="submit">
    $('#uploadfile').on("change", function() {
        var file = this.files[0];
        var fr = new FileReader();
        fr.fileName =;
        fr.onload = function(e) {
            html = '<input type="hidden" name="data" value="' +^.*,/, '') + '" >';
            html += '<input type="hidden" name="mimetype" value="' +^.*(?=;)/)[0] + '" >';
            html += '<input type="hidden" name="filename" value="' + + '" >';


Flow :

  • Using FileReader(), retrieve base64 encoded file, filename and mimetype.
  • Add input with type="hidden" to #form as text data.
    • replace(/^.*,/, '') is used for removing a header of encoded data.
    • match(/^.*(?=;)/)[0] is used for retrieving mimetype of uploading file.
  • When a submit button is clicked, the base64 data is sent to doPost() of GAS.

Note :

  • In order to use this, after the script is modified, please redeploy Web Apps as a new version. By this, the latest script is reflected to Web Apps.
  • This sample script can upload one file. If you want to upload several files, please modify script. var file = this.files[0]; means the selected first file. When there are some files, it is files[1], files[2] .....

Reference :

  • For downloading files on Google Drive to local PC, I have already published here.


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ManTheM commented Dec 21, 2023

Thank u so much! Is there a way to receive an email with the new file uploaded as attachment?

@tanaikech -- any thoughts about having the page automatically reload, so that multiple files can be uploaded? I can add instructions (with the Done! message) to refresh the page in the browser to upload another file--but it would be nice if the upload interface just refreshed automatically.

...anyone? after submit how to prevent GAScript from loading in a new browser window - ie just have "Done" display in index.html

It would be great if these could happen... Any suggestion?

It worked all the code for me. I used with DriveApp.getFolderById(id).createFile(blob); and the id means not the folder name btw(I am saying that for new users). You can find your folder id on the web site textarea at the end of the link something like "AsdvvewsSasfWEASDAvgf5fsMzf_AdsadUj" . And when you want to use it in the script line you should put quote markers both side of your id like DriveApp.getFolderById("AsdvvewsSasfWEASDAvgf5fsMzf_AdsadUj").createFile(blob);

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