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Best json schema output APIs

MockHero API

Tools & Utilities

Generate realistic, schema-aware synthetic test data for any database schema. 50+ field types, AI prompt-to-schema, pre-built templates, JSON/SQL/CSV output.

Free 7-Day Trial

100% uptime 186ms avg MCP ready

HTML to JSON API

Tools & Utilities

The HTML to JSON API is a tool that converts HTML code to JSON format. This can be useful for developers who want to extract data from HTML documents and use it in JSON-based applications. The API takes an HTML document as input and returns a JSON object that contains the same information in a structured format.

Free 7-Day Trial

100% uptime 68ms avg MCP ready

Schema Aware Data Generation MockHero API

Data & Analytics

Enhance your data generation with MockHero's Schema Aware Data Generation API, ensuring data integrity and relevance.

Free 7-Day Trial

100% uptime 93ms avg MCP ready

Mock Data API MockHero

Tools & Utilities

MockHero’s Mock Data API simplifies creating placeholder data, perfect for testing and development needs.

Free 7-Day Trial

100% uptime 142ms avg MCP ready

Synthetic Data MockHero API

AI & Machine Learning

The Synthetic Data Synthetic Data MockHero API allows developers to generate diverse datasets while preserving privacy and compliance.

Free 7-Day Trial

100% uptime 113ms avg MCP ready

JWT encoder API

Security & Cybersecurity

This endpoint takes the information (string) as input, and provides the JWT-encoded result (string) as output. The output also includes a copy of the input, and a « status » value. Status is « Ok » or « Error: … ».

Free 7-Day Trial

100% uptime 312ms avg MCP ready

Schema Markup Validator API

Data & Analytics

Validate structured data markup on any web page including JSON-LD, Microdata, and RDFa. Detects Schema.org types, checks for errors, and returns detailed validation results.

Free 7-Day Trial

100% uptime 223ms avg MCP ready

Universal JSON Fix

Tools & Utilities

Universal JSON Fix repairs broken or malformed JSON, especially from LLMs like ChatGPT, Claude, Deepseek, Gemini, or Llama. This API ensures reliable parsing by fixing mixed quotes, missing commas, and formatting issues, making it ideal for AI applications.

Free 7-Day Trial

100% uptime 13ms avg MCP ready

Diagram Render API

Tools & Utilities

Render diagrams from text-based notation including Mermaid, PlantUML, and DOT syntax. Returns high-quality PNG or SVG images of flowcharts, sequence diagrams, class diagrams, and more.

Free 7-Day Trial

100% uptime 5,089ms avg MCP ready

Sudoku Generator API

Sports & Gaming

This API will automatically provide you with a Sudoku.

Free 7-Day Trial

100% uptime 737ms avg MCP ready

JSON Translate API

Natural Language Processing (NLP)

JSON Translate API converts text in JSON files to multiple languages, facilitating localization and automatic translation of data for web and mobile applications.

Free 7-Day Trial