Logo

HTML to Protobuf Converter

Transform HTML into Protocol Buffers schema definition

HTML Input

Protobuf Schema

About HTML to Protobuf Converter

Convert HTML documents to Protocol Buffers (Protobuf) schema definitions. Generate structured data schemas that can be used for efficient serialization and cross-platform data exchange.

Key Features

  • Schema Generation: Creates complete .proto schema definitions
  • Structured Mapping: Converts HTML DOM to nested message structures
  • Metadata Support: Optional inclusion of document metadata fields
  • Repeated Fields: Support for collections and arrays
  • Attribute Mapping: Converts HTML attributes to Protobuf maps
  • Proto3 Syntax: Uses modern Protocol Buffers syntax
  • Example Data: Includes sample data structure in comments

How to Use

  1. Input HTML: Paste your HTML code or upload an .html file
  2. Configure Options: Set message name and schema options
  3. Review Schema: The Protobuf schema updates automatically
  4. Copy or Download: Use the Copy or Download button to save your .proto file

Generated Schema Structure

  • Main Message: Root message containing document structure
  • Element Message: Represents HTML elements with tag, attributes, text, and children
  • Attribute Message: Helper message for key-value attribute pairs
  • Metadata Fields: Optional title, charset, and language fields
  • Nested Structure: Recursive children field for DOM hierarchy

Protocol Buffers Benefits

  • Efficient: Binary format is smaller and faster than JSON or XML
  • Strongly Typed: Schema provides type safety and validation
  • Cross-Language: Works with Java, C++, Python, Go, and more
  • Backward Compatible: Easy to evolve schemas over time
  • Code Generation: Auto-generate classes in multiple languages
  • Versioning: Field numbers enable schema evolution

Common Use Cases

  • API Design: Define structured API request/response formats
  • Data Storage: Efficient binary storage of HTML-derived data
  • Microservices: Inter-service communication with typed contracts
  • Data Pipeline: Transform HTML to structured data for processing
  • Mobile Apps: Efficient data transfer to mobile applications
  • Configuration: Store HTML-based configuration in binary format

Using the Generated Schema

After generating your .proto file, you can:

  • Compile: Use protoc compiler to generate code in your language
  • Serialize: Convert HTML data to binary Protobuf format
  • Deserialize: Parse binary data back to structured objects
  • Validate: Ensure data conforms to the schema definition
  • Evolve: Add new fields while maintaining compatibility

Example Compilation

// Compile for Python
protoc --python_out=. htmldocument.proto

// Compile for Java
protoc --java_out=. htmldocument.proto

// Compile for Go
protoc --go_out=. htmldocument.proto

Tips for Best Results

  • Meaningful Names: Use descriptive message names for clarity
  • Include Metadata: Enable metadata for complete document representation
  • Repeated Fields: Use repeated fields for collections of elements
  • Clean HTML: Well-structured HTML produces better schemas
  • Review Schema: Always review and adjust the generated schema
  • Add Comments: Document your schema with additional comments

Privacy & Security

All conversions happen locally in your browser. Your HTML is never uploaded to any server, ensuring complete privacy and security.