Yes, this HTML to JSON converter is completely free to use.

How does the conversion work?

It uses the browser's native DOMParser API to parse the HTML string and recursively builds a JSON representation of the DOM tree.

Is my HTML sent to a server?

No. All parsing runs entirely in your browser using the built-in DOMParser API, so your markup never leaves your device.

How are attributes and text represented in the JSON?

Each element becomes a node holding its tag name, an attributes map of name-value pairs, any text content, and an array of child nodes—mirroring the structure of the original DOM tree.

Can it handle malformed or incomplete HTML?

Yes. The DOMParser is lenient and follows the HTML parsing algorithm to recover from common mistakes; the tool also detects and reports parsing errors when they occur.

Convert HTML to JSON Online | Free & Secure

Convert HTML files to JSON online, parsing the document structure into a clean JSON tree. Secure client-side conversion with no upload required.

Paste any HTML markup and this tool instantly converts it into a structured JSON tree—mapping each element to a node with its tag name, attributes, text content, child elements, and comments. Parsing runs entirely in your browser using the native DOMParser API, so no markup is uploaded to a server.

HTML Input

Upload

SampleUploadConvertClear

JSON Output

JSON result will appear here...

JSON FormatterCopyDownload

JSON result will appear here...

Key Features

Client-Side Processing

Your HTML is parsed directly in your browser. No data is sent to any server.

DOM Tree Structure

Converts elements, attributes, text, and comments into a nested JSON object.

Error Handling

Detects and reports HTML parsing errors.

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How to Use the HTML to JSON Converter

1
Paste or upload your HTML
Enter HTML markup directly into the input field, or use the Upload button to load an .html file from your device.
2
Convert to JSON
The tool parses the HTML with the browser's DOMParser and recursively walks the DOM, building a nested JSON object for the document tree.
3
Inspect the output
Review each node's tag name, attributes, text, child elements, and comments in the JSON output panel.
4
Copy or download
Use Copy to send the JSON to your clipboard, or Download to save it as a .json file for use in your code.

References

WHATWG — HTML Standard
The living specification defining HTML elements, attributes, and the parsing algorithm that maps markup to a DOM tree.
MDN — DOMParser
Web API used by this tool to parse an HTML string into a navigable DOM document in the browser.
RFC 8259 — JSON
The IETF specification for the JSON data interchange format used in the tool's output.

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Frequently Asked Questions

Is this tool free?: Yes, this HTML to JSON converter is completely free to use.
How does the conversion work?: It uses the browser's native DOMParser API to parse the HTML string and recursively builds a JSON representation of the DOM tree.
Is my HTML sent to a server?: No. All parsing runs entirely in your browser using the built-in DOMParser API, so your markup never leaves your device.
How are attributes and text represented in the JSON?: Each element becomes a node holding its tag name, an attributes map of name-value pairs, any text content, and an array of child nodes—mirroring the structure of the original DOM tree.
Can it handle malformed or incomplete HTML?: Yes. The DOMParser is lenient and follows the HTML parsing algorithm to recover from common mistakes; the tool also detects and reports parsing errors when they occur.