HTML to JSON Converter
Convert any HTML markup into a clean JSON tree structure with tag, attributes and children.
Convert any HTML markup into a clean JSON tree structure with tag, attributes and children.
This free HTML to JSON Converter from KX Toolkit is part of our all-in-one online toolkit. It runs entirely in your browser, so your data never leaves your device for client-side operations. 100% free, forever - no paywall, no credit card, no trial.
How to use the HTML to JSON Converter
- Paste your input - JSON, regex pattern, JWT, URL etc.
- Pick any flags or options the tool supports.
- Click the action button (Format, Test, Decode).
- Copy the result or download it as a file.
What you can do with the HTML to JSON Converter
- Format and validate API responses while debugging.
- Test regex patterns against real input before deploying.
- Decode JWTs to inspect claims and expiry.
- Generate UUIDs for migrations, tests and seeders.
Why use KX Toolkit's HTML to JSON Converter
- Browser-based: Works on Windows, macOS, Linux, iOS and Android - no install, no extension.
- Privacy-first: Client-side tools never upload your data; server-side tools delete files right after processing.
- Mobile-friendly: Full feature parity on phones and tablets - not a stripped-down view.
- Fast: Optimised for instant feedback. No artificial waiting screens, no email-gated downloads.
- One hub for everything: 300+ tools across SEO, text, image, PDF, code, color, calculators and more - skip switching between sites.
Tips for the best results
Bookmark the most-used tools - your browser bookmark bar is faster than retyping the URL every time.
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What does the JSON output look like?
Each node becomes an object with a type (element, text, comment), a tag for elements, an attributes object, and a children array. Text nodes carry their content as a string. Nested elements become nested children, so the tree mirrors the DOM exactly. The structure is easy to traverse with map and filter when you need to extract or transform content.
When is HTML-to-JSON conversion useful?
It is great for scraping where you want machine-readable output, for content migrations where the destination expects structured data, for headless CMS imports, and for static analysis where you want to count or inspect elements programmatically. It is also useful when generating React or Vue render trees from existing HTML templates.
How does it handle attributes with special characters or no value?
Boolean attributes like checked or disabled become true. Attributes with values are stored as strings even if the value looks numeric, because HTML attributes are always strings at the spec level. Quotes inside values are unescaped, and entity references like & in attribute values are decoded so the JSON contains the actual character.
Are scripts and inline styles preserved?
Yes - script and style elements survive in the JSON tree with their text content as a single text-node child. The conversion never executes them. If you plan to round-trip to HTML, the content is intact. If you plan to render in a different framework, you will probably want to filter out script nodes for safety before injecting.
How does it deal with whitespace between tags?
Significant whitespace becomes text nodes; insignificant whitespace between block-level tags is sometimes collapsed depending on the parser settings. For pretty round-tripping, preserve whitespace; for compact output, collapse. If your downstream consumer is React, leading and trailing spaces inside JSX matter, so keep the whitespace-aware mode on.
Can I convert the JSON back into HTML?
Yes if the converter exposes a serializer or you write one - it is a few dozen lines that recurses through children and emits opening tags, attributes, content, and closing tags. Self-closing void elements like img and br need special handling. Round-tripping should produce HTML that is semantically equivalent, though attribute quoting style may differ.
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