PDF Document API Examples

• Jul 11, 2025
• 2 minutes to read

PDF Graphics and Additional Content

• How to: Generate a Document Layout with a Watermark from Scratch
• How to: Create Graphics in a Document with Landscape and Portrait Page Orientations
• How to: Bookmark Search Results in a Document
• How to: Create an Interactive Form
• How to: Create a ZUGFeRD-Compliant PDF Invoice
• How to: Create a ZUGFeRD-Compliant PDF Invoice
• How to: Access and Modify Custom Document Properties
• How to: Manage Annotations in a PDF Document
• How to: Create Thumbnail Images for Excel, Word, and PDF Documents

Interactive Forms

• How to: Obtain a Checked Appearance Name for Each Radio Button in the Radio Group
• How to: Obtain a Checked Appearance Name for a Check Box
• How to: Replace a Form Field with an Image
• How to: Specify the Format of a Form Field Value

Extract Content from a PDF Document

• How to: Extract Images from a Document
• How to: Extract a Part of the PDF Page as an Image
• How to: Extract Text from a Document
• How to: Search Text in a Document
• How to: Get Coordinates of All Words in a Document

Document Protection

• How to: Protect a PDF Document with a Password
• How to: Add a Visual Signature into a PDF Document
• How to: Sign a PDF File with a Certificate Stored in a .PFX File
• How To: Sign a PDF File with a Certificate Stored in the Windows Certificate Store
• How to: Sign a PDF Document with a Certificate Stored on a Hardware Device
• How to: Use Azure Key Vault API to Sign a PDF Document
• How to: Validate a PDF Document Signature

Export a PDF Document to an Image

• How to: Export a PDF Document to a Bitmap
• How to: Export a PDF Document to a Multi-Page Tiff
• How to: Export a PDF Page to an SVG Image