Convert Excel files to image formats in C# and VB.NET

With GemBox.Spreadsheet you can easily convert Excel files to images using just C# or VB.NET code. You can save your spreadsheet to any type of ImageSaveFormat like PNG, JPEG, BMP, WMP, GIF, or TIFF.

Convert an Excel file to a single image

Saving a single page of an Excel workbook as an image is useful for generating the workbook's preview or thumbnail. To create a single PNG or JPEG file from an Excel file, you need to save the spreadsheet with ImageSaveOptions.

The following example shows how you can convert an Excel page to a PNG image of a specified size.

Converted Excel workbook to PNG image in C# and VB.NET
Screenshot of an input Excel file and converted output PNG image
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using GemBox.Spreadsheet;

class Program
{
    static void Main()
    {
        // If using Professional version, put your serial key below.
        SpreadsheetInfo.SetLicense("FREE-LIMITED-KEY");

        // Load an Excel file into the ExcelFile object.
        var workbook = ExcelFile.Load("%InputFileName%");

        // Create image save options.
        var imageOptions = new ImageSaveOptions(ImageSaveFormat.Png)
        {
            PageNumber = 0, // Select the first Excel page.
            Width = 1240, // Set the image width.
            CropToContent = true // Export only the sheet's content.
        };

        // Save the ExcelFile object to a PNG file.
        workbook.Save("Output.png", imageOptions);
    }
}
Imports GemBox.Spreadsheet

Module Program

    Sub Main()

        ' If using Professional version, put your serial key below.
        SpreadsheetInfo.SetLicense("FREE-LIMITED-KEY")

        ' Load an Excel file into the ExcelFile object.
        Dim workbook = ExcelFile.Load("%InputFileName%")

        ' Create image save options.
        Dim imageOptions As New ImageSaveOptions(ImageSaveFormat.Png) With
        {
            .PageNumber = 0, ' Select the first Excel page.
            .Width = 1240, ' Set the image width.
            .CropToContent = True ' Export only the sheet's content.
        }

        ' Save the ExcelFile object to a PNG file.
        workbook.Save("Output.png", imageOptions)
    End Sub
End Module

Convert an Excel file to a multi-frame image

You can also save multiple pages from an Excel workbook as a single multi-frame image.

For this, you need to use an image format that supports multiple frames, like TIFF or GIF, and you need to specify the ImageSaveOptions.PageCount property.

The following example shows how you can convert the whole Excel workbook (all its sheets) to a multi-page TIFF image.

TIFF frames from converted Excel file using C# and VB.NET
Screenshot of a converted Excel file to TIFF frames
Upload your file (Drag file here)
using GemBox.Spreadsheet;

class Program
{
    static void Main()
    {
        // If using Professional version, put your serial key below.
        SpreadsheetInfo.SetLicense("FREE-LIMITED-KEY");

        // Load an Excel file.
        var workbook = ExcelFile.Load("%InputFileName%");

        // Max integer value indicates that all spreadsheet pages should be saved.
        var imageOptions = new ImageSaveOptions(ImageSaveFormat.Tiff)
        {
            SelectionType = SelectionType.EntireFile,
            PageCount = int.MaxValue
        };

        // Save the TIFF file with multiple frames, each frame represents a single Excel page.
        workbook.Save("Output.tiff", imageOptions);
    }
}
Imports GemBox.Spreadsheet

Module Program

    Sub Main()

        ' If using Professional version, put your serial key below.
        SpreadsheetInfo.SetLicense("FREE-LIMITED-KEY")

        ' Load an Excel file.
        Dim workbook = ExcelFile.Load("%InputFileName%")

        ' Max integer value indicates that all spreadsheet pages should be saved.
        Dim imageOptions As New ImageSaveOptions(ImageSaveFormat.Tiff) With
        {
            .SelectionType = SelectionType.EntireFile,
            .PageCount = Integer.MaxValue
        }

        ' Save the TIFF file with multiple frames, each frame represents a single Excel page.
        workbook.Save("Output.tiff", imageOptions)
    End Sub
End Module

Convert an Excel file to multiple images

You can also save each page from an Excel workbook as a separate PNG or JPEG image.

We recommend saving each ExcelFilePage as a single image file instead of saving the ExcelFile into multiple image files, as shown in the next example.

Converted Excel sheets to PNG images in C# and VB.NET
Screenshot of converted Excel sheets to PNG images
Upload your file (Drag file here)
using System.IO;
using System.IO.Compression;
using GemBox.Spreadsheet;

class Program
{
    static void Main()
    {
        // If using Professional version, put your serial key below.
        SpreadsheetInfo.SetLicense("FREE-LIMITED-KEY");

        // Load an Excel file.
        var workbook = ExcelFile.Load("%InputFileName%");

        // Get Excel pages.
        var paginatorOptions = new PaginatorOptions() { SelectionType = SelectionType.EntireFile };
        var pages = workbook.GetPaginator(paginatorOptions).Pages;

        // Create a ZIP file for storing PNG files.
        using (var archiveStream = File.OpenWrite("Output.zip"))
        using (var archive = new ZipArchive(archiveStream, ZipArchiveMode.Create))
        {
            var imageOptions = new ImageSaveOptions();

            // Iterate through the Excel pages.
            for (int pageIndex = 0; pageIndex < pages.Count; pageIndex++)
            {
                ExcelFilePage page = pages[pageIndex];

                // Create a ZIP entry for each spreadsheet page.
                var entry = archive.CreateEntry($"Page {pageIndex + 1}.png");

                // Save each spreadsheet page as a PNG image to the ZIP entry.
                using (var imageStream = new MemoryStream())
                using (var entryStream = entry.Open())
                {
                    page.Save(imageStream, imageOptions);
                    imageStream.CopyTo(entryStream);
                }
            }
        }
    }
}
Imports System.IO
Imports System.IO.Compression
Imports GemBox.Spreadsheet

Module Program

    Sub Main()

        ' If using Professional version, put your serial key below.
        SpreadsheetInfo.SetLicense("FREE-LIMITED-KEY")

        ' Load an Excel file.
        Dim workbook = ExcelFile.Load("%InputFileName%")

        ' Get Excel pages.
        Dim paginatorOptions As New PaginatorOptions() With {.SelectionType = SelectionType.EntireFile}
        Dim pages = workbook.GetPaginator(paginatorOptions).Pages

        ' Create a ZIP file for storing PNG files.
        Using archiveStream = File.OpenWrite("Output.zip")
            Using archive As New ZipArchive(archiveStream, ZipArchiveMode.Create)

                Dim imageOptions As New ImageSaveOptions()

                ' Iterate through the Excel pages.
                For pageIndex As Integer = 0 To pages.Count - 1

                    Dim page As ExcelFilePage = pages(pageIndex)

                    ' Create a ZIP entry for each spreadsheet page.
                    Dim entry = archive.CreateEntry($"Page {pageIndex + 1}.png")

                    ' Save each spreadsheet page as a PNG image to the ZIP entry.
                    Using imageStream As New MemoryStream()
                        Using entryStream = entry.Open()
                            page.Save(imageStream, imageOptions)
                            imageStream.CopyTo(entryStream)
                        End Using
                    End Using
                Next

            End Using
        End Using

    End Sub
End Module

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