Regular expression tester Regular expression tester

Test regular expressions online

Write a JavaScript-compatible regular expression and immediately see all matches in the sample text.

Flags and capture groups are visible, making the tool useful for logs, validation patterns and parser drafts.

The tool runs directly in the browser and is ready for quick checks without installing software.
Input can be cleared and recalculated immediately, which is useful for repeated small tasks.
Use fullscreen mode when you need more space for long text, structured data or large result blocks.
Copy buttons are available on generated output so results can be reused in code, documents or support chats.
Most operations are deterministic: the same input and options produce the same output.
For sensitive content, prefer local browser tools and review the result before sharing it further.