Unicode Regex Tester

Write and test regular expressions that work correctly with Unicode. Use Unicode property escapes and script matching to validate text patterns.

Unicode Regex Tester

Test regular expressions with Unicode character support

Regex Pattern

Flags

Common Patterns:

Input Text

Results

Unicode Regex Tips

Use \p{...} for Unicode properties
Add u flag for full Unicode support
\p{L} matches any letter from any language
\p{Emoji} matches emoji characters
\p{Script=Name} matches characters from a specific script

How the Unicode Regex Tester Works

Enter your regular expression pattern and test text. The tester highlights all matches with Unicode-aware matching. See match groups, positions, and captured text.

Unicode regex supports character properties: \p{L} for any letter, \p{Emoji} for emoji, \p{Script=Han} for Chinese characters. Match by category, not just specific characters.

Test flags affect matching: case-insensitive, multiline, dot-all, Unicode mode. Visualize how each flag changes matching behavior. Essential for international text processing.

When You'd Actually Use This

Validating international input

Names from any language? Use \p{L}+ for letters. Not just A-Z. Accept all valid names. Better user experience.

Extracting emoji from text

Find all emoji in user content? Use \p{Emoji}+. Extract for analysis or filtering. Process emoji separately.

Parsing multilingual content

Text with mixed scripts? Match specific scripts. \p{Script=Arabic} for Arabic text. Process each script appropriately.

Building search functionality

Search needs to work globally. Unicode regex handles case folding across languages. Better search results.

Testing regex patterns

Built a Unicode regex? Test it here before deploying. Verify it matches expected text. Catch edge cases early.

Learning Unicode regex

Unicode regex is powerful but complex. Experiment with patterns. See what matches. Educational tool for developers.

What to Know Before Using

Unicode mode must be enabled.Many regex engines need /u flag for Unicode. Without it, \p doesn't work. Enable Unicode mode for full support.

Character properties are powerful.\p{L} = any letter in any script. \p{N} = any number. \p{P} = punctuation. More flexible than character classes.

Case folding is complex.Turkish 'i' case folds differently. Greek has final sigma. Unicode handles these correctly with proper flags.

Script detection is available.\p{Script=Latin}, \p{Script=Han}, etc. Match text by writing system. Useful for language detection.

Pro tip: For production regex, test with real user data. Edge cases always appear. Emoji, combining characters, and rare scripts can break patterns.

Common Questions

What is Unicode regex?

Regular expressions with Unicode support. Character properties, script matching, proper case folding. Beyond ASCII regex.

How do I match any letter?

Use \p{L} or \p{Letter}. Matches A-Z, à-ü, Cyrillic, Arabic, CJK, all letters. Much better than [a-zA-Z].

Can I match emoji?

Yes, \p{Emoji} matches all emoji. \p{Emoji_Presentation} for emoji that display as emoji. Useful for filtering.

What's the /u flag?

Unicode mode flag. Enables Unicode features in regex. Required for \p{} in JavaScript. Other languages have similar flags.

How do I match a specific script?

\p{Script=Name}. \p{Script=Han} for Chinese. \p{Script=Arabic} for Arabic. Match by writing system.

Does this work in all languages?

Most modern languages support Unicode regex. JavaScript, Python, Java, .NET all support it. Syntax varies slightly.

What about combining characters?

Combining marks are separate characters. e + combining acute = é. Regex can match base or combined. Consider normalization.

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