🔧 Regex Character Class Generator
Visually build regex character classes [...], test matches in real-time.
Select Character Ranges
Test Match
📖 Regex Character Class Generator
What isRegexcharacterclass？
RegexExpressioncharacterclassisuse Brackets[...]enclosed character set, matching anyBracketsany one character in the set. For example[abc]matches a, b, orcany one in the set. [a-z] matches anyLowercase.[^0-9]matches non-Digitscharacter.Character classes are one of the most commonly used regex constructs.
Core features of Regex Character Class Generator
- 🔧 canvisualizationSelect Character Ranges，Noneno manual writing needed
- ⚡ Real-time regex generation
- 🧪 physicalwhenTest Matcheffects with highlighted results
- 📐 Support for negation [^...] and quantifiers
- 🎨 Support for Unicode ranges and custom characters
- 🔒 Pure frontend processing, privacy protected
Regex Character Class Generator in 3 steps
- Check needed character ranges (digits, letters、special chars, etc.)
- Choose whether to use negation mode
- Select quantifier (+, *, ?, {n,m})
- Enter text in test area to verify matching
- Copy the generated regex to your project
When to use Regex Character Class Generator
- 👨💻 Developers building regex for input validation
- 🔍 Search and replace specific characters in text
- 📝 Form validation (email, phone, password rules)
- 🧹 Data cleaning and text processing
- 📖 Learning regex character class syntax
📖 FAQ
What are regex character classes?
Regex character classes use brackets [...] to define a set of characters. For example, [abc] matches a, b, or c. [a-z] matches any lowercase letter. [^0-9] matches any non-digit character.
How to use hyphens in character classes?
In character classes, hyphens represent ranges, like [a-z] for all characters from a to z. To match a literal hyphen, place it at the start or end like [-abc] or [abc-], or escape it with [\\-].
What does negation class [^...] mean?
The negation class [^...] matches any character NOT in the set. For example, [^0-9] matches any character that is not a digit.
What predefined character classes are available?
Common predefined classes include \\d (digits), \\w (word characters), \\s (whitespace), and their negated counterparts \\D, \\W, \\S.
Will data be uploaded to a server?
No. All regex generation and testing is done locally in your browser. No data is uploaded to any server. Your regex patterns and test data remain entirely under your control.