Logo

HTML to JSON Lines Converter

Transform HTML into JSON Lines format

HTML Input

JSON Lines Output

About HTML to JSON Lines Converter

Convert HTML documents to JSON Lines (JSONL) format, where each line is a valid JSON object. Perfect for streaming data processing, log analysis, and big data workflows.

Key Features

  • JSON Lines Format: Each line is a separate, valid JSON object
  • Two Modes: Hierarchical (preserves structure) or Flattened (one element per line)
  • Attribute Extraction: Optionally include all HTML attributes
  • Streaming-Friendly: Process large HTML files line by line
  • Parent Context: In flatten mode, includes parent element information
  • Text Extraction: Captures text content from elements

How to Use

  1. Input HTML: Paste your HTML code or upload an .html file
  2. Choose Mode: Select hierarchical or flattened structure
  3. Configure Options: Toggle attribute inclusion
  4. Review Output: The JSON Lines output updates automatically
  5. Copy or Download: Save as .jsonl file

Output Modes

  • Hierarchical Mode: Each top-level element becomes one JSON line with nested children
  • Flatten Mode: Every element becomes a separate JSON line with parent context

JSON Lines Format

JSON Lines (JSONL) is a text format where:

  • Each line is a valid JSON object
  • Lines are separated by newline characters (\n)
  • No commas between objects
  • Easy to stream and process incrementally

Example Output (Hierarchical)

{"tag":"div","attributes":{"class":"container"},"children":[...]} 
{"tag":"p","text":"Sample text","children":[]}

Example Output (Flattened)

{"tag":"div","attributes":{"class":"container"},"parent":"body"} 
{"tag":"h1","text":"Title","parent":"div"} 
{"tag":"p","text":"Text","parent":"div"}

Common Use Cases

  • Data Streaming: Process HTML data in streaming pipelines
  • Log Analysis: Analyze HTML structure as log entries
  • Big Data: Import HTML data into Hadoop, Spark, or similar systems
  • Machine Learning: Prepare HTML data for ML training
  • ETL Pipelines: Extract HTML data for transformation workflows
  • Database Import: Import HTML elements into NoSQL databases

Privacy & Security

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