Best Tools for Freelancers 2026

Build, test, and debug regular expressions with real-time explanations and code generation.

Modify HTTP request and response headers directly from your browser for web development and debugging.

Ship AI-generated code that works by continuously suggesting fixes and improvements.

Browser-based Android debugging tool for seamless development and testing.

Test and develop ChatGPT and MCP apps locally without ngrok or ChatGPT subscription.

Open-source Kubernetes observability for developers with auto-instrumentation and scriptable debugging.

A simple, open-source tool to replay HTTP requests for testing and debugging.

Collect, organize, and alert on software errors and performance in real-time, affordably.

Your Open Source AI Coding Agent that writes, debugs, and ships code alongside you.

A command-line JSON viewer for efficient data exploration and debugging.

Debug gRPC, REST, SSE, and WebSocket APIs from a single, privacy-first workspace.

All-in-one error tracking, application performance monitoring, and uptime checks for web apps.

Automatically corrects errors in your previous console commands with a magnificent app.

Debug, monitor, and optimize your LLM applications and AI agents with comprehensive observability.

View, edit, format, compare, and transform JSON data online with ease.