Form to JSON Schema
Reverse engineer HTML forms into JSON schema definitions. Paste any HTML form and extract field names, types, validation rules, and options into a reusable JSON format.
HTML Form
JSON Schema
Extracted JSON schema will appear here...
What Gets Extracted
- • Field names, types, and labels from inputs
- • Validation attributes (required, min, max, pattern)
- • Select options with values and labels
- • Placeholder text and help content
Why Use Form to JSON Schema?
Need to recreate an existing form in a different framework? This tool extracts the structure of any HTML form into a portable JSON schema that you can use with our JSON-to-form generators or your own code generation tools.
Frequently Asked Questions
What HTML elements are detected?
The tool extracts input, select, and textarea elements. It also detects associated labels and validation attributes like required, min, max, and pattern.
Does it preserve all attributes?
The tool extracts the most commonly used form attributes including name, type, placeholder, required, and validation rules. Custom data attributes are not included.
Can I use the output with your generators?
Yes! The JSON schema output is designed to be compatible with our JSON to HTML Form, Tailwind Form, Bootstrap Form, and React Form generators.
How are radio buttons handled?
Radio buttons with the same name are grouped together with their individual options and labels extracted into an options array.
What if the HTML is malformed?
The tool uses browser HTML parsing which is forgiving of minor errors. However, severely malformed HTML may not extract correctly.