This tool is a powerful online regular expression tester with built-in common regex templates, helping developers verify regex matching results in real time, quickly extract capture groups, and highlight matched content.

Main Features

• One-click common regex fill: Built-in regex templates for mobile phone, URL, Email, Chinese characters, double-byte characters, 18-digit ID card, integer, IPv4, date, etc. Click to test.
• Real-time matching: Automatically matches and highlights results in real time when entering regex or modifying test text.
• Flag support: Supports all standard flags including g (global), i (ignore case), m (multiline), s (match newline), u (Unicode), and y (sticky).
• Capture group extraction: The table lists in detail the content, start index, and all sub-capture group data for each match.

Common Regex Descriptions

• 1[3-9]\d{9} — Matches Mainland China mobile phone numbers (11 digits, starts with 1, second digit 3-9)
• [\w.\-]+@[\w\-]+(\.[\w\-]+)+ — Matches Email addresses
• [\u4e00-\u9fa5]+ — Matches Chinese characters (Unicode Han range)
• [^\x00-\xff]+ — Matches double-byte characters (including Chinese, Japanese, Korean, etc.)
• ((25[0-5]|2[0-4]\d|1\d{2}|[1-9]?\d)\.){3}(25[0-5]|2[0-4]\d|1\d{2}|[1-9]?\d) — Matches IPv4 addresses (0.0.0.0 - 255.255.255.255)
• \d{4}-(0[1-9]|1[0-2])-(0[1-9]|[12]\d|3[01]) — Matches date format (YYYY-MM-DD)

Tool Features

• Line number editor: The test text area has line numbers, making it easy to locate multi-line content.
• Safe escaping: Escapes HTML special characters before highlight rendering to prevent XSS attacks.
• Pure front-end execution: All calculations are performed locally in your browser; your data is never collected or uploaded.