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Sharing practical tips and guides for using online tools

Regex Tester Guide — From Pattern Validation to Practical Use

Learn regex basics, common pattern examples, how to use online regex testers, and differences between JavaScript and Python syntax.

Try the tools that many people use.

Convert URLs or text into QR codes

167 currencies with daily refreshed USD-based rates.

Easily check date calculations and D-Day

Convert between HEX, RGB, HSL color codes

Create beautiful gradients and copy the code