PDF Ink Documentation

PDF Ink is a WordPress plugin designed to add custom watermarks and protection to PDF files instantly during the download process. It is compatible with WooCommerce, Easy Digital Downloads (EDD), and DLM, and can be used as a standalone PHP add-on for PDF manipulation.

By combining PDF Ink with SetaPDF-Stamper, developers can programmatically add customized embedded file streams into PDF documents.

PDF Ink allows shop owners to dynamically stamp PDF and EPUB files during download with customer-specific information. This includes built-in support for date, buyer info, quantity, and order numbers. It can also be used to watermark files with VAT information or custom data collected from WooCommerce checkout fields (e.g., choir/band/ensemble names).

PDF Ink supports the on-the-fly addition of 41 different types of 1D and 2D barcodes, including QR codes, to PDF files during the download process.

Customers can access their PDF Ink account to manage profile information, handle license management, download plugin files, and access download invoices.

Using SetaPDF via PDF Ink, you can morph external links within a PDF on the fly during download. This allows the insertion of personalized affiliate codes, UTM tags, or secret user tokens without modifying the original source file.

PDF Ink provides WordPress shortcodes that allow users to place PDF download links anywhere on a page. When these links are clicked, the plugin automatically passwords or stamps the PDF before delivery.

For shops operating in Brazil using WooCommerce, Easy Digital Downloads (EDD), or Download Manager (DLM), it is possible to stamp the customer's CPF tax number onto PDF or EPUB files by adding custom code to WordPress.

PDF Ink provides 'Magic Tags' that allow developers to dynamically watermark PDFs with customer-specific information, such as name, email, phone number, and quantity ordered, at the time of download.

PDF Ink can be used to signal a request to block AI scraping by implementing the W3C’s TDMRep protocol within the PDF metadata.

Beyond visible stamps, PDF Ink supports adding invisible watermarks and metadata to PDF and EPUB files to provide a layer of protection and tracking that is harder for users to remove.

Support for the PDF Ink WordPress plugin and PHP drop-in is available via their contact form. Responses are provided during business hours (Monday-Friday, USA Mountain Time), excluding major holidays.