PowerPoint files, from C#.

using Aspose.Slides;
using Aspose.Slides.Export;

using var presentation = new Presentation("quarterly-review.pptx");

presentation.Save("review.pdf", SaveFormat.Pdf);
presentation.Save("review.html", SaveFormat.Html);
presentation.Save("review.tiff", SaveFormat.Tiff);

using var presentation = new Presentation("deck.pptx");

foreach (var slide in presentation.Slides)
{
    using var image = slide.GetImage(2f, 2f);
    image.Save($"slide-{slide.SlideNumber}.png", ImageFormat.Png);
}

using Aspose.Slides.Charts;

using var presentation = new Presentation();
var slide = presentation.Slides[0];

var chart = slide.Shapes.AddChart(ChartType.ClusteredColumn, 60, 60, 620, 400);
var cells = chart.ChartData.ChartDataWorkbook;

chart.ChartData.Categories.Add(cells.GetCell(0, 1, 0, "Q1"));
chart.ChartData.Categories.Add(cells.GetCell(0, 2, 0, "Q2"));
chart.ChartData.Series.Add(cells.GetCell(0, 0, 1, "Revenue"), chart.Type);

presentation.Save("report.pptx", SaveFormat.Pptx);

using var presentation = new Presentation("board-deck.pptx");

presentation.ProtectionManager.Encrypt("s3cret");

var options = new PdfOptions { Password = "s3cret" };
presentation.Save("board-deck.pdf", SaveFormat.Pdf, options);

using var target = new Presentation("master.pptx");
using var source = new Presentation("appendix.pptx");

foreach (var slide in source.Slides)
    target.Slides.AddClone(slide);

target.Save("combined.pptx", SaveFormat.Pptx);