String Counter

String Occurrence Counter Instructions

Features

• Millisecond Real-time Counting: No need to manually click "Calculate". As you type in the input box or adjust any checkbox, the result on the right will update in real time.
• Case Sensitive: Enabled by default. If you want "Hello" and "hello" to be counted as the same word, just uncheck this option.
• Regular Expression Support: When "Use Regular Expression" is checked, your search target will be executed as a regex rule (e.g., input \d+ to count the number of digit blocks, input [A-Za-z]+ to count English words). If your regex is incorrect, the panel will turn red to warn you.
• Seamlessly Handle Large Text: Based on native JavaScript string search algorithms, it has excellent performance and can easily handle MB-level long text.

Application Scenarios

• SEO/Copywriting Optimization: Count the frequency and density of core "keywords" in a promotional article.
• Data Cleaning & Troubleshooting: Check the total number of occurrences of a specific Error tag in a log file.
• Code Auditing: Use regular expressions to count the number of calls to a specific function in a code snippet (e.g., console\.log).