Free online HTML to JSON converter. Convert HTML markup to a structured JSON representation and back. Handles nested elements, attributes, text content, self-closing tags, and complex document structures. 100% browser-based with zero uploads.
100% browser-based — your data never leaves your device
Convert HTML markup to structured JSON and back.
Copy your HTML or JSON data and paste it into the input area.
Select HTML to JSON or JSON to HTML using the direction toggle.
Click Convert, then copy the output for use in your application.
Drop a file here or click to browse
Ctrl+Enter to convert
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HTML ↔ JSON Converter is a free online json tool that convert html markup to structured json and back. It works entirely in your browser — no downloads, no installations, and no server uploads required. backend developers, frontend engineers, DevOps engineers use HTML ↔ JSON Converter when they need a fast, privacy-respecting way to process json data without installing additional software. It supports capabilities such as bidirectional, nested support, structured output. Additional features include local processing. Common use cases include extracting structured data from html documents for api consumption, generating html programmatically from json configuration files, transforming web page content into structured data for analysis. All processing happens locally using modern browser APIs, which means your data never leaves your device. This makes HTML ↔ JSON Converter ideal for working with sensitive data, proprietary code, or any situation where privacy matters.
HTML ↔ JSON Converter is a free online json tool that helps you convert html markup to structured json and back. Key capabilities include bidirectional, nested support, structured output. All processing is done locally in your browser — no data is uploaded, stored, or shared with any server. There are no sign-ups, no file size limits, and no hidden charges. It is commonly used to extracting structured data from html documents for api consumption.
Copy your HTML or JSON data and paste it into the input area.
Select HTML to JSON or JSON to HTML using the direction toggle.
Click Convert, then copy the output for use in your application.
| Category | Details |
|---|---|
| Input Limits | Maximum file size: Browser memory bound (~2 GB) |
| Nesting depth: Unlimited (browser stack limit) | |
| Supported Formats | JSON, JSONC (with comments), JSON5 (extended syntax) |
| Browser Engine |
|
All operations run entirely in your browser using built-in JSON APIs. No server uploads, no data storage, and no third-party requests.
HTML ↔ JSON Converter is ideal when you need to extracting structured data from html documents for api consumption without installing software or uploading data to a server. Since everything runs in your browser, there is no setup time and no risk of your data being stored on external servers. For for persistent editing environments with linting, consider using VS Code with JSON extension. For for server-side JSON processing in scripts, jq (command-line) may be a better fit. HTML ↔ JSON Converter fills the gap between heavyweight desktop tools and insecure online services that require uploading your data.
Yes. The converter works bidirectionally. Toggle between HTML-to-JSON and JSON-to-HTML modes with a single click.
Each HTML element becomes an object with tag, optional attrs (attribute key-value pairs), and either content (text) or children (nested elements). This makes the structure predictable for programmatic use.
Yes. Self-closing tags like br, hr, img, and input are automatically detected and preserved in both directions.
Convert HTML to structured JSON and JSON back to valid HTML with a single toggle.
Handles deeply nested HTML elements, attributes, text content, and self-closing tags correctly.
JSON output uses tag, attrs, content, and children keys for a clean, predictable structure.
All conversion happens in your browser — nothing is uploaded.
HTML ↔ JSON Converter is useful in a variety of scenarios across different workflows:
Extracting structured data from HTML documents for API consumption
Generating HTML programmatically from JSON configuration files
Transforming web page content into structured data for analysis
For best results, ensure your HTML is well-formed with matching open/close tags. The parser handles most edge cases but valid HTML produces more predictable output.
When converting JSON to HTML, use tag for element names, attrs for attributes, content for text-only children, and children for nested elements.
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