FastOS Tools
FastOS Tools

Regex-Tester

Testen Sie reguläre Ausdrücke online. Passen Sie Muster an, testen Sie Regex und sehen Sie Ergebnisse in Echtzeit.

Regex-Muster

Test-Text

Funktionsübersicht

The Regex Tester tool helps you design, test, and debug regular expressions in real time. See all matches, groups, and errors instantly as you type, so you can build reliable patterns faster.

Wann sollte ich dieses Tool verwenden?

Use this tool whenever you need to test a regular expression: cleaning text data, validating user input, extracting information from logs, or learning how complex patterns behave.

So verwendest du das Tool

1

Enter your regular expression

Type or paste a regex pattern into the pattern input box. You can include anchors, groups, lookarounds, and flags.

2

Provide sample test text

Paste example text into the test area, such as a log snippet, CSV line, or form input you want to validate.

3

Adjust flags and options

Toggle flags like global, multiline, or case-insensitive to see how they change the matches in real time.

4

Inspect matches and groups

Review highlighted matches in the text and detailed lists of capturing groups to verify your pattern behaves as expected.

Anwendungsbeispiele

Validating email addresses

Before adding a regex-based email validator to your backend, test the pattern here with a variety of real-world email examples to avoid blocking valid users.

Extracting IDs from log files

Paste a few lines of log output and design a regex that captures request IDs or user IDs into groups, then copy the final pattern into your scripts.

Häufig gestellte Fragen

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