DevTools
Quick Reference
Portfolio

Browse by Category

21 tools across 8 categories

Testing

2 cheatsheets, 3 snippets

snippet

Java Excel Utility - Comprehensive

Apache POI-based utility for reading and writing Excel files (.xlsx, .xls) with support for data-driven testing.

Production-ready Excel utility class with read/write operations, cell styling, and data manipulation for test automation

snippet

Java Selenium - ScreenshotUtil

Reusable Java utility for capturing browser, element, and failure screenshots in Selenium-based automation frameworks.

Reusable ScreenshotUtil implementation for capturing browser, element, and failure screenshots in Selenium automation

cheatsheet

Selenium Java Basics - Cheatsheet

Selenium is a browser automation framework used to automate and test web applications across browsers.

Complete reference of Selenium WebDriver basic commands used in real-world automation projects

snippet

K6 Testing Snippets

Modern load testing tool using JavaScript to test API, microservices, and website performance at scale.

Ready-to-use K6 load testing scripts for common API testing scenarios with example outputs and performance metrics

cheatsheet

K6 Load Testing Cheatsheet

Modern load testing tool using JavaScript to test API, microservices, and website performance at scale.

Enterprise-ready K6 performance testing cheatsheet with commands, scripts, thresholds, and CI usage

Git

1 cheatsheet, 3 snippets

snippet

GitHub Webhooks - Java

Event notification system that triggers HTTP callbacks when repository events occur on GitHub.

Java Spring Boot implementation for GitHub webhooks with signature verification and deployment

snippet

GitHub Webhooks - Node.js

Event notification system that triggers HTTP callbacks when repository events occur on GitHub.

Node.js Express and vanilla implementations for GitHub webhooks with signature verification

snippet

GitHub Webhooks - PHP

Event notification system that triggers HTTP callbacks when repository events occur on GitHub.

PHP native implementation for GitHub webhooks with signature verification and deployment

cheatsheet

GitHub Webhooks - Reference

Event notification system that triggers HTTP callbacks when repository events occur on GitHub.

Security headers, events, testing, and setup guide for GitHub webhooks

Certificate

4 cheatsheets, 0 snippets

cheatsheet

Let's Encrypt - Advanced

Free, automated certificate authority providing SSL/TLS certificates for securing websites with HTTPS.

Advanced Let's Encrypt features including Docker, monitoring, best practices, and production deployment

cheatsheet

Let's Encrypt - Certificates

Free, automated certificate authority providing SSL/TLS certificates for securing websites with HTTPS.

Issue, renew, and manage SSL certificates with Let's Encrypt and Certbot

cheatsheet

Let's Encrypt - Installation

Free, automated certificate authority providing SSL/TLS certificates for securing websites with HTTPS.

Install Certbot and configure Let's Encrypt SSL certificate tool

cheatsheet

Let's Encrypt - Troubleshooting

Free, automated certificate authority providing SSL/TLS certificates for securing websites with HTTPS.

Common Let's Encrypt and Certbot errors with solutions and debugging steps

Maven

2 cheatsheets, 1 snippet

cheatsheet

Maven - Commands

Build automation and dependency management tool for Java projects with powerful lifecycle management.

Essential Maven commands for building, testing, and managing Java projects

snippet

Maven Proxy Configuration

Build automation and dependency management tool for Java projects with powerful lifecycle management.

Configure Maven Proxy to download maven dependencies behind organization's proxy.

cheatsheet

Maven Useful Commands

Build automation and dependency management tool for Java projects with powerful lifecycle management.

Maven commands to quickly get you going.

DevOps

2 cheatsheets, 0 snippets

cheatsheet

Docker Cheatsheet

Containerization platform to build, ship, and run applications consistently across environments.

Enterprise-ready Docker commands, patterns, and best practices for development and production environments

cheatsheet

PM2 Cheatsheet

Production process manager for Node.js that keeps applications alive, enables load balancing, and provides monitoring capabilities.

Production-ready PM2 commands and patterns for Node.js process management

Automation

1 cheatsheet, 0 snippets

cheatsheet

CSS Selectors Strategies Cheatsheet

CSS selectors offer fast, readable, and browser-native strategies to reliably locate elements in modern UI automation.

Production-ready CSS selectors cheatsheet for UI automation with basic to advanced strategies and real-world examples.

Web

1 cheatsheet, 0 snippets

cheatsheet

Complete XPath Cheatsheet

XPath is a query language used to locate and navigate elements in HTML and XML documents.

Complete generic XPath reference with real-world patterns and examples for locating elements in HTML and XML

Telegram

0 cheatsheets, 1 snippet

snippet

Telegram Bot APIs

Bot platform and API for sending messages, photos, and files via automated Telegram bots.

Quick-access to Telegram Bot APIs plus common troubleshooting steps.