Regex Matches Nothing / Greedy .* Swallows Results — How to Fix

Online regex test matches nothing, or greedy .* eats too much, or groups capture nothing? Explains greedy vs lazy, escaping special chars, and anchors — with a step-by-step debug using our regex tester.

API Testing: How to Send a Token and Fix CORS Errors

How to add an Authorization token when testing APIs online, and what to do about CORS / 405 / timeout errors? A step-by-step troubleshooting guide with our API tester.

Mock Data Generator Complete Guide: Generate Test Data Fast

Learn how to use a mock data generator to quickly create various types of test data, boosting frontend development and testing efficiency

JSON to TypeScript: Complete Guide to Auto-Generating Type Definitions

Step-by-step tutorial on how to quickly convert JSON data to TypeScript interfaces and type definitions, boosting development efficiency and code quality

.gitignore Generator Guide: Generate Ignore File Configurations with One Click

Detailed introduction to the role and syntax rules of .gitignore files, teaching you how to quickly generate ignore configurations that meet your project needs