Regex Tester Support
Enter a regular expression and sample text to inspect matches, positions, and numbered or named groups. Use replacement text to preview the result, or add test cases to check expected matches and non-matches. The pattern builder, syntax reference, and included samples help you compose patterns.
Files and saved work
Save workspaces with titles and notes. Android's file picker is used to import and export JSON workspaces, export match lists as CSV, and save replacement output as text. The original input file is not modified. Exported files can be deleted at their destinations.
Expression compatibility
Regex Tester uses Android's standard regular expression engine. Its syntax and Unicode behavior can differ from JavaScript, PCRE, Python, and other environments. Check the final pattern in the environment where it will be used. Requires Android 10 or later.
Support
For problems, email info@caen.co.jp with your device model, Android version, steps to reproduce, and any displayed error. Do not include private input text or sensitive regular expressions. A non-sensitive example can be used if you choose to share one.
Provider
Provider: CAEN Inc.
Privacy policy: https://apps.caen.co.jp/en/regex-tester/privacy/
Contact
For questions about Regex Tester, please contact CAEN Inc. by email.