Regular expression tester
- Input→
- Options→
- Result
Test regular expressions online
Write a JavaScript-compatible regular expression and inspect matching text fragments. Enable g to find all occurrences or disable it to see only the first one.
Flags and capture groups are visible, making the tool useful for logs, validation patterns and parser drafts.
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The tool runs directly in the browser and is ready for quick checks without installing software.
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Input can be cleared and recalculated immediately, which is useful for repeated small tasks.
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Use fullscreen mode when you need more space for long text, structured data or large result blocks.
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Copy buttons are available on generated output so results can be reused in code, documents or support chats.
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Most operations are deterministic: the same input and options produce the same output.
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For sensitive content, prefer local browser tools and review the result before sharing it further.
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