Any free Pdf to Image conversion Library (dll)..Plz suggest

Madhan Kumar

10y6.6kLearn iOS Programming

I need to convert pdf to image in my application,,.

please anyone suggest me Any Free Pdf to image conversion dll

or Help me for Creating dll for image conversion..

5 Replies

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Leon D10y ago
Accepted answer
Hi,
You can check this pdf library:http://freepdf.codeplex.com, but free version has some limitations.
Reference:
http://www.e-iceblue.com/Tutorials/Spire.PDF/Spire.PDF-Program-Guide/Convert-PDF-Page-to-Image-with-Specified-Resolution.html
http://www.e-iceblue.com/Tutorials/Spire.PDF/Spire.PDF-Program-Guide/Convert-PDF-Page-to-Image-with-C-code.html
Kip Hackman6y ago
You can use LEADTOOLS Imaging Pro SDK technology in your application.
https://www.leadtools.com/sdk/products/imaging-pro
You can leverage the RasterCodecs class that will allow you to convert your PDF files to any of the LEADTOOLS supported file formats. A major benefit of using LEADTOOLS over a free library, is our wide support of file formats for read and write support. Also, the LEADTOOLS libraries act as a one stop shop offering much more than just image conversion, including OCR, document/image viewers, image processing, etc.
https://www.leadtools.com/help/sdk/v20/dh/to/file-format-support.html
Here is some sample code:
string pdfFile = @"FILE PATH TO PDF INPUT FILE";
string imageFile = @"FILE PATH TO OUTPUT IMAGE";

using (RasterCodecs _codecs = new RasterCodecs())
{
    using (RasterImage _image = _codecs.Load(pdfFile))
    {
        _codecs.Save(_image, imageFile, RasterImageFormat.Jpeg, 24);
    }
}
Pacak9y ago
All listed libs are not either actually free or have license limitations:
Spire.PDF (freepdf.codeplex.com) community edition (free version) can load only PDFs < 10 pages, and only first 3 pages may be rendered to image.
LibPdf is not maintained any more, and it can be used only under GPL license because it is uses poppler as library (which is GPL-only). In other words, it cannot be used in closed-source project
ImageMagick is a wrapper for GhostScript which is licensed under AGPL. This means that for usage in commercial projects commercial license is needed (rather expensive).
I recommend to use "poppler" tools as command line utility: you may execute it with System.Diagnostics.Process from C# code and in this case GPL license does not violated.
Also you may use existing .NET poppler wrapper to get solution with one line of c# code (it is commercial but price is small): https://www.nrecosite.com/pdf_to_image_renderer_net.aspx
Madhan Kumar10y ago
Thanks folks ..The Spire.pdf dll was working fine...
Vinay Singh10y ago
Use LibPdf(http://code.google.com/p/lib-pdf/downloads/list OR https://sourceforge.net/projects/libpdf/), for PDF to Image conversion

LibPdf library converts converts PDF file to an image. Supported image formats are PNG and BMP, but you can easily add more.

Usage example:
using (FileStream file = File.OpenRead(@"..\path\to\pdf\file.pdf")) // in file
{
    var bytes = new byte[file.Length];
    file.Read(bytes, 0, bytes.Length);
    using (var pdf = new LibPdf(bytes))
    {
        byte[] pngBytes = pdf.GetImage(0,ImageType.PNG); // image type
        using (var outFile = File.Create(@"..\path\to\pdf\file.png")) // out file
        {
            outFile.Write(pngBytes, 0, pngBytes.Length);
        }
    }
}

ImageMagick, you should also look at this freely available and powerful tool. It's capable of doing what you want and also provides some .NET bindings (as well as bindings to several other languages).
In its simplest form, it's just like writing a command

convert file.pdf imagefile.png