From Clomosy Docs

FileToBase64 is a function used in Clomosy to convert the content of a file to Base64 format. This function reads the content of a file, loads it into a TclMemoryStream object in memory, and then converts this stream to Base64 format.

Example
In the example, when a button is clicked, it writes an image obtained from the project files to a TclMemo object in Base64 format.

 var
   Form1 : TCLForm;
   loadImageButton : TClProButton;
   noteMemo : TclMemo;

 void memoFileToBase64Click;
 {
   noteMemo.Lines.Text = Clomosy.FileToBase64(clPathCombine('apple.png',Clomosy.AppFilesPath));
 }

 //------ Main Code ------
 {
   Form1 = TCLForm.Create(Self);
   Form1.AddAssetFromUrl('https://clomosy.com/demos/apple.png');
   
   noteMemo = Form1.AddNewMemo(Form1,'noteMemo','---');
   noteMemo.Align = alMostTop;
   noteMemo.Height = 300;
   noteMemo.StyledSettings = ssFamily;
   noteMemo.TextSettings.WordWrap = True;
 
   loadImageButton = Form1.AddNewProButton(Form1,'loadImageButton','Add FileToBase64');
   loadImageButton.Align = alMostBottom;
   loadImageButton.Margins.Top = 20;
   loadImageButton.clProSettings.FontSize = 16;
   loadImageButton.clProSettings.FontColor = clAlphaColor.clHexToColor('#ffffff');
   loadImageButton.clProSettings.BackgroundColor = clAlphaColor.clHexToColor('#6966ff');
   loadImageButton.clProSettings.RoundHeight = 10;
   loadImageButton.clProSettings.RoundHeight = 10;
   loadImageButton.SetclProSettings(loadImageButton.clProSettings);
   Form1.AddNewEvent(loadImageButton,tbeOnClick,'memoFileToBase64Click');
   
   Form1.Run;
 }

See Also