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Syntax Fix Video Metadata Retrieval Extractor Data Simulation Deepseek Content Manipulation JSON Schema Output Customizable Data Testing Optimization Data Management Data Visualization Tool Schema.org Detection Flowcharts API Testing On-Demand Data Schema Aware Data Generation Image Generation Charts Markdown Conversion

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Best structured json 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

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

PDF Table Extraction API

Extract structured tables from PDF files and return them as JSON, Excel, or CSV. Automatically detects single or multiple tables, supports multi-page PDFs, and delivers deterministic, machine-readable output for data pipelines and automation.

Tools & Utilities Free 7-Day Trial

100% uptime 18ms avg MCP ready

Markdown Maker API

Turn web pages into actionable content by extracting text or converting to markdown for easy integration and processing.

Tools & Utilities Free 7-Day Trial

100% uptime 148ms 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

100% uptime 625ms avg MCP ready

Dynamic Test Data MockHero API

Effortlessly generate dynamic test data on demand using MockHero's Dynamic Test Data API, optimizing your testing process.

Tools & Utilities Free 7-Day Trial

100% uptime 1,531ms avg MCP ready

Database Seeding MockHero API

Use the Database Seeding Database Seeding MockHero API to populate your databases with quality test data, streamlining your development workflow.

Tools & Utilities Free 7-Day Trial

100% uptime 1,619ms avg MCP ready

Text to Image by Style API

Convert text into personalized images based on artistic styles, facilitating creative visual generation that is fast and adaptable to various projects.

Visual Recognition & Imaging Free 7-Day Trial