Free AI-Powered API Testing & Debugging Platform

Test REST APIs, analyze performance, debug endpoints, and generate documentation. All powered by AI and completely free with no registration required.

Free API Endpoint Testing
Free Performance & Load Testing
Free API Security Analysis
Free Documentation Generation
AI-Powered API Insights

Comprehensive API Testing & Analysis Tools

Our AI-powered platform provides professional-grade API testing across all critical aspects of your development workflow.

REST API Tester

Test GET, POST, PUT, DELETE requests with custom headers, authentication, and payload validation for any REST API endpoint.

API Performance Analyzer

Analyze API response times, throughput, and perform load testing to identify bottlenecks and optimize performance.

API Security Scanner

Identify security vulnerabilities, test authentication methods, and analyze API security best practices compliance.

Smart API Documentation

Generate comprehensive API documentation, analyze endpoints, and get AI-powered recommendations for improvement.

Simple 3-Step Process

Get professional API analysis in just three simple steps

1

Enter API Details

Provide API endpoint URL and configuration

2

AI Analysis

Our AI performs comprehensive testing and analysis

3

Get Results

Receive detailed reports with performance metrics and recommendations

Free AI-Powered API Tools

Professional-grade API testing tools, completely free and powered by advanced AI

100% Free AI-Powered

Free API Tester

Complete REST API endpoint testing with custom headers, authentication, and payload validation.

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100% Free AI-Powered

Free Performance Monitor

API speed and load testing with comprehensive performance analysis and bottleneck identification.

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100% Free AI-Powered

Free Security Scanner

API vulnerability assessment with security best practices analysis and threat detection.

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100% Free AI-Powered

Free Documentation Generator

Auto-generate API docs with comprehensive endpoint analysis and interactive examples.

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100% Free AI-Powered

Free Response Analyzer

JSON/XML response validation with schema analysis and data structure optimization.

100% Free AI-Powered

Free Authentication Tester

OAuth, JWT, API key testing with comprehensive authentication flow validation.

Why Choose APIFiddler?

Making professional API testing accessible to every developer

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Instant Testing

Test any API endpoint in under 30 seconds with our optimized testing algorithms

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AI-Powered

Advanced algorithms provide intelligent API analysis with actionable insights

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Comprehensive Reports

Detailed performance, security, and compliance analysis with exportable results

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Developer-Friendly

Clean interface with exportable results and ready-to-use code examples

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Security-First

Identify vulnerabilities and security best practices with comprehensive scanning

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Completely Free

All AI-powered API tools are free to use, no limits or hidden costs

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No Registration

Start testing APIs immediately without signup or account creation

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Auto Documentation

Generate API documentation automatically from tests with interactive examples