Fast, Powerful Imaging API Library for .NET 6

Apply advanced image processing in code, with zero dependencies.

  • Load and save image files like BMP, JPEG, TIFF, GIF, ICO, SVG, WebP, and PNG
  • Apply advanced processing effects like dithering and thresholding on grayscale and RGB images
  • Draw graphics, add advanced text with full font handling, and paragraph formatting to images
  • Compatible with Windows, macOS, and Linux
  • Deploy locally, inhouse or to Cloud including Azure and AWS
  • Includes a JavaScript Image Viewer to view and edit images on the client-side

Latest Release Info

What's New in GrapeCity Documents v6.2


A .NET image API library is a programming interface that allows developers to programmatically create and manipulate images at scale. GrapeCity Documents for Imaging is a solution allowing developers to load, process, and save images across many different formats in desktop and web-based applications.

Fast and Efficient

Save memory with the small file size and time with the lightweight API architecture. Scalable, flexible, efficient, and fast to handle small and large TIFFs at top speed. Integrate with client-side Image Viewer to load, view, edit and save images.

Image Processor

Meet all the needs of a basic image processor: resize, convert, rotate, and flip images. Create, apply, and align the images in your apps that you need when you need them.

Advanced Image Effects

Convert average images into high-quality, detailed images in less time. Apply advanced image effects like dithering, thresholding effects, half-tone transparencies, resolution editing, grayscale conversion, effects on RGB images, and more.

Text and Graphics

Dynamically enhance your images with logos and text. With extensive font, layout, and graphic support, you can convert your images into branding elements and professional pages.

Full .NET Core Support

Develop for any .NET platform or major operating system like Windows, Linux, and Mac with a single code base. Use in your apps for .NET Core, .NET Framework, Mono, Xamarin.iOS, and Xamarin.Android.

Image Processing to the Cloud

Be everywhere with cloud-based deployment. With NuGet and GcImaging, you can deploy to Azure, AWS, and AWS Lambda to create services that manage and convert images on the cloud.

Image Comparison

Compare images for software testing, image manipulation detection, or comparing shots from security frames. Perform fuzzy image comparisons and generate different images. This tool provides an effective way of comparing a variety of image types.

Render Special CJK Characters

Render specific CJK characters on images with advanced support. Special TrueType features such as hinting are used to re-use glyph parts for drawing CJK characters on images.

Apply Effects

Apply advanced imaging effects which includes dithering, thresholding, gray scaling and various RGB effects.

Import HTML into Your Images

  • Render a URL or HTML string to Images.
  • No dependency on GPL/LGPL licensed software.
  • Use the same browser instance to render multiple pages.
  • Modify/replace the HTML page content.

Manage Profile Photos in Your Apps

  • Convert to grayscale or sepia
  • Apply effects to TIFF images
  • Resize and crop images
  • Export to popular image formats
  • Add a round clip to images

Handle Images on Any Device or System

  • Dither high-color depth images to view on low-color depth environments
  • Select from eight different dithering effects
  • Apply to any image format



BlendMode, Background Bitmap and Transparency Mask

BitmapRenderer class provides BlendMode, BackgroundBitmap and TransparencyMaskBitmap objects to draw graphics, text, images interacting with the background items on GcBitmapGraphics object.

Top Features for Image API

Create Thumbnails

Downscale Images, and Apply various interpolation algorithms and create thumbnails of any size.

Alt image information

Draw Text on Images

Support advanced text layout engine with full font support, text processing, layout and formatting follows Unicode standards.

Alt image information

Convert Images

Easily convert images, including photos and pictures, into popular image formats like BMP, PNG, TIFF, GIF, and JPG.

Modify Images

Explore Bitmap transformations, creating thumbnails, enlarging images, indexing, and round clipping.

Create Icons (ICO)

Create a multi-frame ICO from a large PNG, Read a multi-frame ICO file, and render all frames along the diagonal of the resulting image.

Programmatically convert HTML to Image formats

HTML to Images

Render an HTML table with JavaScript, and save HTML as JPG, PNG, TIFF, BMP, or GIF.

GrapeCity Documents Image Viewer

Integrate with client-side Image Viewer to load, view, edit and save images.


Learn more about how you can alter brightness and contrast, saturation, dithering, grayscale, thresholding, and more.

Alt image information


Draw Shapes and Round Rectangles with custom gradients, use clipping paths, add various watermarks, and more.

Image Comparison

Compare two similar images with minor differences, PNG vs JPEG, text rendered with TrueType font hinting, and more.

Animated GIFs

Create an animated GIF from JPG images, convert true color frames of your animated GIF to an indexed 8bpp, and more.

Additional Imaging Effects

Convert full-Colored images to indexed images with a palette, or apply color matrix and transparency masks to images.

Advanced TIFF Processing

Read and write TIFF frames quickly and easily. In addition, apply TIFF compression and color spaces and support tiled, planar, and differencing storage methods.

Create Tables with complex layout

Create Tables with Complex Layouts

Make use of new TableRenderer API to create tables with complex layout, merge cells, rotate text direction in cells and draw custom content in the cells.

Extract EXIF Metadata

Extract all EXIF metadata from images, including time taken, shutter speed, focal length, light value, location, flash, title, creator, date, description, and copyright.


Perform text rendering, trimming, antialiasing, and TrueType hinting. Explore our Japanese and Arabic language packs.


Create a multi-frame TIFF with different images and dithering methods, extract frames from a TIFF, and more.

WebP Format

Load and Save images in WebP Format. (Each sample in demo browser has a WebP format tab.


Draw complex text and images with GcImaging.Skia library.


Compose images with blending modes, reduce image color depth without loss of quality, swap color channels in an image, and more.

Quick Start

In this tutorial, we create a real-life scenario with GrapeCity Documents for Imaging to give you a fundamental understanding of what it can do.

Draw SVG to Raster Images

Load, inspect, and modify the internal structure of SVG images, render SVG on PDF document and images.

GrapeCity Documents Image Viewer

Check out the image editing tools: crop, resize, flip, rotate and other awesome features in GrapeCity Documents Image Viewer; helping you create a full-featured workflow to load, edit and save images in your applications.

Documents for Imaging Samples Browser

Your full-fledged ASP.NET Core sample browser includes all significant features, real-time image files, and use-cases. Download individual .NET Core samples that can run as a standalone. Demos include full sample code with comments to quickly bring you on board with Documents for Imaging. The demos now use the new GrapeCity Documents Image Viewer. Click the link below to learn more.

"The speed to build what we needed and the level of ease of use of controls are why we chose GrapeCity. It was a perfect fit."

Spiro Skias - CGI