How to Convert Image Format Programmatically – .NET

Converting images between different formats is a common requirement in many applications. Here's how to do it in C#.

Image Conversion Code

csharp

using System.Drawing;
using System.Drawing.Imaging;

public class ImageConverter
{
    public static void ConvertImage(string inputPath, string outputPath, ImageFormat format)
    {
        using (Image image = Image.FromFile(inputPath))
        {
            image.Save(outputPath, format);
        }
    }
    
    public static void ConvertToJpeg(string inputPath, string outputPath)
    {
        ConvertImage(inputPath, outputPath, ImageFormat.Jpeg);
    }
    
    public static void ConvertToPng(string inputPath, string outputPath)
    {
        ConvertImage(inputPath, outputPath, ImageFormat.Png);
    }
    
    public static void ConvertToBmp(string inputPath, string outputPath)
    {
        ConvertImage(inputPath, outputPath, ImageFormat.Bmp);
    }
    
    public static void ConvertToGif(string inputPath, string outputPath)
    {
        ConvertImage(inputPath, outputPath, ImageFormat.Gif);
    }
}

Supported Formats

JPEG - Best for photographs
PNG - Best for graphics with transparency
BMP - Uncompressed bitmap
GIF - Supports animation and transparency
TIFF - High quality for printing

Image Conversion Code

Supported Formats

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