Tools/Developer tools/JavaScript Regex Tester
All tools

JavaScript Regex Tester

Test JavaScript regular expressions against text, highlight matches, and inspect match positions and capture groups.

Test text0 characters
Matches0 items
Waiting for test text

Input and result notes

Regular-expression syntax and flags depend on the engine; browser results may differ from a backend language. Test both matching and non-matching examples, including multiline input and Unicode characters.

Developer tools
  • Word Frequency Counter

    Count occurrences of Chinese and English words in text and sort the frequency list to find repeated terms.

  • Word and Character Counter

    Count characters, words, lines, paragraphs, and sentences, and estimate reading time for pasted text.

  • Text Information Extractor

    Extract email addresses, URLs, phone numbers, IP addresses, or numbers from pasted text using pattern matching.