Build and test your regex.

Learn the editor, work through examples, and connect regex101 to your tools.

Worked examples

Extract order IDs, add regression tests, and run the generated JavaScript.

Load a file, apply two replacement layers, and copy the completed text.

Compare execution times for the same inputs and repeat the measurement in Node.js.

Pro adds multiple test strings, benchmarks, document extraction, and substitution pipelines.

Deployment requirements, included features, and annual Enterprise pricing.

Community discussions, bug reports, and release notes.