Development

Detect error-prone and risky regex patterns, check for catastrophic backtracking, unanchored patterns, and provide rewrite suggestions

Development

Generate random strings that match a given regular expression pattern

Text Processing

Statistics and frequency analysis of text patterns (numbers, emails, URLs, etc.)

Utilities

Calculate zodiac sign based on birth date and show date ranges for all zodiac signs

Text Processing

Automatically add spaces between Chinese characters and English/numbers to improve readability

Document Tools

Create PDF documents with text, paragraphs, headers, footers, and page numbers

Document Tools

Create newspaper/magazine style documents with 2 or 3 columns

Fitness

Calculate Rate of Perceived Exertion for training intensity assessment

Validation

Validate passport numbers from different countries (China, USA, Japan, etc.)

Data Visualization

Generate beautiful Nightingale rose charts (coxcomb charts) to visualize data through both angle and area, perfect for comparative analysis and historical data presentation

Data Processing

Perform calculations on each row and add new columns

Text Processing

Find, format and normalize phone numbers within text content