About

What is the GD library?

GD is an open source code library for the dynamic creation of images by programmers. GD is written in C, and "wrappers" are available for Perl, PHP, ruby and many other bindings.

## Supported Image Formats

GD has builtin support for:

• BMP (builtin)
• GIF with animation support (builtin)
• TGA (builtin)
• WBMP (builtin)
• WebP via libwebp
• PNG via libpng
• JPEG using external library:
  • libjpeg-turbo (recommended)
  • libJpeg-
  • Does not include JPEG2000
• AVIF via libavif
• HEIF via libheif - This includes AVIF read support if your system's libheif has AV1 decoding.
• TIFF via libtiff
• XPM via libXpm

GD is commonly used to generate charts, graphics, thumbnails, and most anything else, on the fly. It is lite weight and fits usages like web development, embemdedded, or any other usages you may need.

It supports transparency, blending, images transformations and various filters. Its design allows the additions of custom features in a very friendly manner.

The library was originally developed by Thomas Boutell and is now maintained by Pierre Joye and many valuable contributors, under the umbrella of PHP.net.

Support

Support, discussions or feedback can be done using:

• github issues
• github discussions
• Gitter chat
• Mailing list

Contribute

See Contribute to LibGD.