The best Software Testing tools and resources on the internet.

Easiliy generate fake (but realistic) data for testing and development using Faker.js.

Ultimate Network Service Exploitation Tool

Windows inside a Docker container.

Immediately check one or one hundred PDF files for signs of inaccessibility

An agentic QA tool for use in end to end QA processes, built as a multi-agent AI system that autonomously plans, writes, executes, and reports tests for REST APIs, web UIs, and Python codebases.

Makes JSON easy to read. Open source.

Display and control your Android device.

Screen Capture with editing tools

Real-time Python regular expression editor

Python based testing framework

Free LLM API pricing comparison. Compare GPT-5, Claude, Gemini & DeepSeek costs instantly. Updated daily with official prices from OpenAI, Anthropic & more.

#Unit Testing

Playwright for AI Agents. Test what your agent DOES, not what it SAYS. YAML-first behavioral testing. Catch PII leaks, tool abuse, step explosions. 3200+ tests.

A CLI diff tool that compares files based on their syntax, not line-by-line. Difftastic produces accurate diffs that are easier for humans to read.

Ophiuchi is a lightweight, easy-to-use, and secure localhost SSL proxy that helps you generate SSL certificates for your local development environment in 5 seconds.

Reclaim tens of gigabytes of your storage used for various Xcode caches

A QA automation framework with a built-in AI assistant that writes scalable Playwright tests with you as your product grows.

Validate, format, and lint JSON

Regular Expression Visualization Site - Create a Diagrams from your regular expressions

Online REST API client

Temporary and reusable inbox at your fingertip

Accessibility Checker for Developers, Testers, and Designers in Chrome

Enhancing Web Accessibility Testing with Cypress

SQL Database Explorer [SQLite, libSQL, PostgreSQL, MySQL/MariaDB, DuckDB, ClickHouse]

Debug remotely and easily with a range of features like chrome devtool.

Fill test data using the right-click context menu to assist with exploratory testing.

Commandline tool for running SQL queries against JSON, CSV, Excel, Parquet, and more.

Run SQL queries in your browser.

Node.js mock server running live, interactive mocks in place of real APIs

Lint an npm or Yarn lockfile to analyze and detect security issues via predefined security policies.