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Best json schema output APIs

MockHero API

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.

Tools & Utilities Free 7-Day Trial

100% uptime 186ms avg MCP ready

HTML to JSON API

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.

Tools & Utilities Free 7-Day Trial

100% uptime 68ms avg MCP ready

Schema Aware Data Generation MockHero API

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

Data & Analytics Free 7-Day Trial

100% uptime 93ms avg MCP ready

Mock Data API MockHero

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

Tools & Utilities Free 7-Day Trial

100% uptime 142ms avg MCP ready

Synthetic Data MockHero API

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

AI & Machine Learning Free 7-Day Trial

100% uptime 113ms avg MCP ready

JWT encoder API

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: … ».

Security & Cybersecurity Free 7-Day Trial

100% uptime 312ms avg MCP ready

Schema Markup Validator API

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.

Data & Analytics Free 7-Day Trial

100% uptime 223ms avg MCP ready

Universal JSON Fix

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.

Tools & Utilities Free 7-Day Trial

100% uptime 13ms avg MCP ready

Diagram Render API

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.

Tools & Utilities Free 7-Day Trial

100% uptime 5,089ms avg MCP ready

Sudoku Generator API

This API will automatically provide you with a Sudoku.

Sports & Gaming Free 7-Day Trial

100% uptime 737ms avg MCP ready

JSON Translate API

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

Natural Language Processing (NLP) Free 7-Day Trial