PDF to HTML API & SDK

Convert Documents with Adaptive Precision

Transform Static Documents into
Responsive Web Content

Our PDF to HTML conversion technology transforms fixed-format PDF documents into flexible, responsive HTML content. Built specifically for development teams and software vendors who need reliable document processing capabilities, this API and SDK solution parses PDF structure at the element level—preserving text, images, and layout while enabling responsive display across devices.

Unlike basic converters that simply render PDFs as images, our conversion engine maintains text searchability, preserves document structure, and delivers clean HTML code that can be further manipulated programmatically. This makes it ideal for content management systems, document archives, and web publishing platforms where content needs to adapt to different screen sizes.

The PDF to HTML API supports both synchronous and asynchronous processing models, making it suitable for both real-time user-facing applications and high-volume batch processing workflows. Whether you're building a document management system, content migration tool, or publishing platform, our conversion technology provides the technical foundation for accurate, reliable PDF-to-HTML transformation.

Key Features & Technical Capabilities

Intelligent Document Structure Preservation

Our conversion engine analyzes PDF document structure at the element level, identifying headings, paragraphs, lists, tables, and other content components. This structural awareness enables the creation of semantically meaningful HTML that maintains the document's logical organization while allowing for responsive display. The resulting HTML preserves the reading order and hierarchical relationships between elements, making it ideal for accessibility compliance and content repurposing.

Flexible Conversion Modes

The API supports multiple conversion approaches to meet different technical requirements:

  • Reflow Mode

    Creates responsive HTML that automatically adapts to different screen sizes and devices

  • Hybrid Mode

    Combines both approaches for complex documents with mixed content types

  • Fixed Position Mode

    Maintains exact visual positioning when pixel-perfect layout reproduction is required

Complete Package Delivery

When converting PDF to HTML files, you receive a complete package containing the HTML page along with all associated images and resources, delivered in a single .Zip file. This eliminates the complexity of managing multiple folders or additional files, simplifying integration into your application or workflow. The package structure makes it straightforward to host or further process the converted content.

POST/html-to-pdf/v1
Content-Type:multipart/form-data

[email protected]
format=A4


Multiple Input Sources

The conversion API accepts PDF content from multiple sources to accommodate different workflow requirements:
Import from cloud storage services (Dropbox, Google Drive)
Upload PDF files directly from local storage
Support for drag-and-drop file selection in browser-based implementations
Specify a URL for remote PDF retrieval

This flexibility makes the API suitable for both backend processing systems and interactive user-facing applications.

Format Customization Options

Control the output format of your converted documents with granular format options:
Select from standard page sizes (letter, legal, tabloid, ledger)
Choose from international formats (A0-A6)
Opt for single-page continuous output for scrolling interfaces
Default settings optimize for common use cases while allowing for customization

Asynchronous Processing Model

The API implements an asynchronous processing model for handling larger documents and high-volume workloads:

Submit conversion job and receive operation ID
Check status using /operation/v1 /{operationId}/ status endpoint
Retrieve completed conversion when processing finishes

This approach prevents timeout issues with large documents and enables efficient batch processing for document-heavy workflows.

Web-Ready Output

The converted HTML files are immediately ready for web publishing. Unlike static PDFs that appear identical across all devices, the HTML output adapts to different screen sizes and resolutions—particularly important for mobile viewing. This makes the conversion ideal for:

  • Creating responsive web versions of PDF-based content

  • Developing cross-platform reading experiences

  • Building mobile-friendly document repositories

Technical Advantages Over Alternative
Approaches

SDK vs. SaaS Conversion Services

Aspect
Document Privacy
Our PDF to HTML SDK/API
Process documents locally or on your own servers
Generic SaaS Converters
Documents uploaded to third-party services
Aspect
Integration Depth
Our PDF to HTML SDK/API
Direct integration with application code
Generic SaaS Converters
Limited to HTTP requests and responses
Aspect
Customization
Our PDF to HTML SDK/API
Programmatic control over conversion parameters
Generic SaaS Converters
Limited to provided options
Aspect
Batch Processing
Our PDF to HTML SDK/API
Build custom batch workflows
Generic SaaS Converters
Often limited by rate restrictions
Aspect
Cost Structure
Our PDF to HTML SDK/API
Predictable licensing without per-document fees
Generic SaaS Converters
Usually priced per conversion
Implementation Flexibility

Unlike browser-based PDF viewers that simply render static documents, our conversion technology transforms PDFs into truly responsive web content. The resulting HTML can be:

Further modified using standard web development tools

Integrated into existing content management systems

Styled with custom CSS for brand consistency

Enhanced with JavaScript for interactive features

Indexed by search engines for improved discoverability

Technical Control

The API provides granular control over the conversion process through request parameters and configuration options. This enables developers to:

Fine-tune the balance between fidelity and responsiveness

Implement custom error handling for problematic documents

Process documents in batches with consistent results

Integrate conversion into automated workflows

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API Reference

The PDF to HTML conversion is accessible through a RESTful API endpoint:

POST/html-to-pdf/v1


Request Parameters

Parameter
file
Type
string($binary)
Description
The HTML content to convert to PDF. Max size 10MB
Parameter
url
Type
string
Description
The URL of the HTML content to convert to PDF. Used if file is not provided
Parameter
format
Type
string
Description
Format of the PDF document. Available qualities are: singlePage, letter, legal, tabloid, ledger, A0, A1, A2, A3, A4, A5, A6. Default is singlePage

Response Codes

Code
202
Description
JSON object with operation ID. Use /operation/v1/{operationId}/status to check status
Code
400
Description
Invalid request
Code
401
Description
Unauthorized access

Example Response

{
"id":"3fa85f64-5717-4562-b3fc-2c963f66afa6"
}
        

Frequently Asked Questions

What is the process of changing a PDF to HTML format?

Converting PDF to HTML involves parsing the content and creating HTML tags to replicate the structure of your PDF. Our conversion engine analyzes the document structure, identifies text blocks, images, tables, and other elements, then generates corresponding HTML markup that preserves both content and layout while enabling responsive behavior.

How do I convert a PDF to HTML using the API?

After authenticating with the API, you can submit a PDF file for conversion either by uploading the file directly or providing a URL where the PDF can be accessed. The API processes the document and returns an operation ID, which you can use to check conversion status and retrieve the resulting HTML package when processing is complete.

What are the technical limitations of the conversion process?

The API currently supports PDF files up to 10MB in size. Certain complex PDF features like embedded fonts, complex vector graphics, and interactive forms may be converted with varying degrees of fidelity. Documents with heavy use of custom fonts or complex layouts may require additional styling for optimal display.

Can I customize how tables and forms are processed?

Yes, the API provides parameters for controlling how specific document elements are handled during conversion. For tables, you can specify whether to preserve exact layout or convert to responsive HTML tables. Form fields can be converted to standard HTML input elements or maintained as static content depending on your requirements.

How does the conversion handle document security?

The API respects document security settings. If a PDF has printing or copying restrictions, you'll need appropriate permissions to convert it. All document processing occurs within secure environments, and converted content is not stored longer than necessary to complete the requested operation. Size and daily usage limitations may apply based on your subscription plan.

Get Started with PDF to HTML Conversion

Technical Implementation

Authenticate with the API using your developer credentials

Submit PDF content via direct upload or URL

Monitor conversion status using the operation ID

Retrieve the converted HTML package when processing completes

Integrate the HTML content into your application or website

Next Steps

Access Developer Documentation for detailed implementation guides

View API Reference for complete endpoint specifications

Start Technical Trial to test with your own documents

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Transform your static PDF documents into responsive, web-ready HTML today with our developer-focused conversion technology.