TCPDF is one of the most active open-source projects in the world. It is used daily by millions of people and is included in thousands of CMS and other web applications. External libraries are not required for basic functions, all page formats, custom pages formats, units of measure, and custom margins. UTF-8 Unicode, right-to-left languages. TrueType Unicode and OpenType Unicode. TrueType, OpenType Unicode and TrueType fonts. Font subsetting. Methods to publish some XHTML + HTML CSS code, Javascript and forms. Images, graphics (geometric figures), as well as transformation methods. Supports JPEG and PNG images natively, all images that are supported by GD (GD2, GD2PART and GIF), all images that are supported via ImagMagick, and all images that are supported by GD (GD2, GD2, GD2PART and GIF), and all images that are supported by GD (GD. Automatic page header/footer management. Document encryption up to256-bit, digital signature certifications and transactions to UNDO orders, as well as PDF annotations including links and file attachments.