Website to JSON API: Convert Webpage Data into Structured JSON
Converting a website to JSON means selecting useful data from HTML and organizing it into named fields and collections. Apps Manager lets you map webpage elements, apply transformations, preview the output, and expose the result through a scraping API for your application.
Overview & Architecture
Use structured extraction when you need product names, prices, article links, or table records instead of the complete HTML document. This is different from serializing every HTML node to JSON: you decide which information belongs in the response. Field mappings and collections define the output, while transformations control formatting and types.
Detailed Implementation Guides
1Example output shape for product data
This illustrative record shows a possible schema after field mapping and transformations. It is not a captured API response, and your response envelope depends on your API configuration.
{
"title": "Example product",
"price": 49.99,
"currency": "USD",
"sourceUrl": "https://example.com/products/1"
}2Extract HTML tables and repeating lists
Choose a table, repeating list, or repeating card collection and map the values inside each item. Check that optional cells or missing links do not shift fields onto the wrong record. Preview more than one row to verify the mapping.
3Use extracted JSON in apps and data pipelines
A stable schema makes scraped data easier to store or pass to downstream systems. Validate required fields before saving records, preserve a source URL for traceability, and decide how stale cached data may be. If a source changes its layout, retest the extraction before relying on the new output.
Step-by-Step Quickstart
11. Define the output fields
List the values your application needs, such as title, price, currency, and sourceUrl. Decide whether each field should be text, a number, or a boolean before mapping it to the page.
22. Map the source elements
Open the scraper builder, select the webpage, and map each field with the visual picker or selectors. Configure a collection for repeating rows, cards, or list items rather than treating the entire page as one record.
33. Transform and validate
Use explicit operations such as trim, currency_cleanup, number, or parse_boolean where appropriate. A price string does not become a reliable number merely because it is returned as JSON. Test missing values, separators, and currency formats against representative records.
44. Return JSON through an endpoint
Link the saved scraper to a dynamic API. The route below is an example you create, not a universal URL-to-JSON endpoint. Its output depends on your field mappings and response configuration.
# First publish a GET endpoint at /products in your application. # Replace YOUR_APP_ID with the application ID shown in your console. # Keep API keys on your server, not in public browser code. curl "https://apps-manager.in/api/apps/YOUR_APP_ID/data/products" \ -H "x-api-key: YOUR_API_KEY"
Frequently Asked Questions
Does converting HTML to JSON require an AI model?
No. The documented workflow uses selectors, collections, and explicit transformations. You choose what to extract and can inspect the mapping before publishing it.
Can I extract data from JavaScript pages?
Use the Chromium rendering mode when the values are absent from the initial HTML. Configure waits for the required elements, then test the result. Access challenges and unsupported interactions can still prevent extraction.
Will every field be typed automatically?
Configure field types and transformations for your data. Verify numeric, date, and boolean conversions with representative values rather than assuming all source text follows the same format.
Start Building with Apps Manager Today
Build databases, create scraping APIs, convert websites to JSON, and issue Ed25519 cryptographic software licenses in minutes. Zero credit card required.