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Flatten PDF - Remove Form Fields API

PDF4me Flatten PDF is a powerful enterprise-grade solution that transforms interactive PDF documents into static, non-editable files through advanced API integration. This comprehensive PDF flattening service efficiently removes all form controls, interactive elements, annotations, and editable content while preserving document structure and visual appearance. The API processes PDF flattening by receiving source PDF files through REST API calls, utilizing advanced rendering technology for precise form control removal and document security enhancement. With comprehensive support for complex form structures, interactive elements, and security requirements, this solution is ideal for document distribution systems, security workflows, compliance applications, and enterprise document management platforms that require reliable, scalable PDF flattening with guaranteed content protection and form control elimination.

Authenticating Your API Request​

To access the PDF4me REST API, every request must include proper authentication credentials. Authentication ensures secure communication and validates your identity as an authorized user of the REST API.

Get your api Key

Key Features​

  • Complete Form Control Removal: Remove all interactive form elements including text fields, checkboxes, radio buttons, dropdown lists, and input controls
  • Interactive Elements Elimination: Flatten all interactive content including buttons, links, and dynamic elements
  • Annotation Removal: Strip all annotations, comments, and markup from PDF documents
  • Security Enhancement: Create non-editable, static PDFs for secure distribution and archival
  • Document Structure Preservation: Maintain original layout, formatting, and visual appearance
  • Seamless API Integration: RESTful API designed for automated workflows and enterprise system integration

REST API Endpoint​

The PDF4me REST API uses standard HTTP methods to interact with resources. All PDF flattening operations are performed through a single endpoint:

  • Method: POST
  • Endpoint: /api/v2/FlattenPdf

Flattening Capabilities​

The API provides comprehensive PDF flattening functionality for different security and distribution requirements:

Form Control Removal​

  • Text Fields: Convert all text input fields to static text content
  • Checkboxes: Replace interactive checkboxes with visual representations
  • Radio Buttons: Transform radio button groups into static selections
  • Dropdown Lists: Convert dropdown menus to displayed text values
  • Date Pickers: Replace date selection controls with static date displays

Interactive Elements​

  • Buttons: Remove all clickable buttons and form submission elements
  • Links: Convert hyperlinks to static text while preserving URLs
  • JavaScript: Eliminate all embedded JavaScript and dynamic functionality
  • Digital Signatures: Remove signature fields while preserving document integrity
  • Form Validation: Strip all client-side validation rules and constraints

Content Preservation​

  • Visual Layout: Maintain exact document appearance and formatting
  • Text Content: Preserve all text content and readability
  • Images: Keep all images, graphics, and visual elements intact
  • Page Structure: Maintain original page breaks and document flow

REST API Parameters​

Complete list of parameters for the Flatten PDF REST API. Parameters are organized by category for better understanding and implementation.

Important: Parameters marked with an asterisk (*) are required and must be provided for the API to function correctly.

Required Parameters​

ParameterTypeDescriptionExample
File Content*Base64The content of the input fileJVBERi...
File Name*StringSource PDF file name with .pdf extensiondocument.pdf

Output​

The PDF4me Flatten PDF REST API returns a response that can be viewed in multiple formats. Choose the view that best fits your needs:

JSON Response Format

The raw JSON response from the API:

{
  "File Content": "Output file content from the PDF4me Connect"
}

Request Example​

Content-Type: application/json
Authorization:  YOUR_API_KEY

Note: Get your API key from the PDF4me Dashboard

Payload​

{
  "docContent": "Please put PDF base64 content",
  "docName": "output.pdf"
}

Code Samples​

The PDF4me Flatten PDF REST API provides code samples in multiple programming languages. Choose the language that best fits your development environment:

C# (CSharp) Sample

Complete C# implementation for flattening PDF documents:

PDF Flattening Features​

Security Enhancement​

  • Form Control Removal: Eliminate all interactive form elements for security
  • Content Protection: Create non-editable documents for secure distribution
  • Data Integrity: Preserve document content while removing interactive capabilities
  • Access Control: Prevent unauthorized modifications and form tampering

Document Processing​

  • Visual Preservation: Maintain exact document appearance and layout
  • Content Retention: Keep all text, images, and visual elements intact
  • Structure Maintenance: Preserve page breaks, formatting, and document flow
  • Quality Assurance: Ensure high-quality output with professional appearance

Interactive Element Removal​

  • Button Elimination: Remove all clickable buttons and form controls
  • Link Conversion: Convert hyperlinks to static text while preserving URLs
  • JavaScript Removal: Eliminate all embedded scripts and dynamic functionality
  • Annotation Stripping: Remove all comments, markup, and interactive annotations

Industry Use Cases & Applications​

Legal & Professional Services Use Cases

  • Legal & Compliance: Flatten legal documents to prevent unauthorized modifications and ensure document integrity
  • Contract Protection: Flatten contracts and agreements to prevent unauthorized modifications
  • Court Documents: Flatten court filings and legal documents for secure distribution
  • Compliance Documentation: Flatten compliance documents to ensure document integrity

Get Help​

Get Your API KeyAPI SamplesGetting Started