Best Regular Expression Testers in 2026

When you need to check a pattern against sample text, a regex tester can help you see what it matches and inspect how it behaves. Compare the supported regex flavors, pattern explanations, and step-through debugging, then consider whether code generation or saved patterns would be useful in your work. Available platforms, free plans, and paid starting prices add practical context. The ranking begins with regex101, RegexPilot, and RegexCraft, with Debuggex and RegexStudio also among the early entries. Look across the criteria to find a fit for the languages you work with and the way you want to test or reuse patterns.