Remove Prefix From Text Online

How to Use

This tool allows you to remove specific text patterns from the beginning of each line in your content:

1. Paste your text in the input area
2. Enter the prefix you want to remove in the "Prefix to remove" field
3. Alternatively, enter multiple prefixes in the "Multiple prefixes" area (one per line)
4. Configure the options as needed
5. Click "Remove Prefix" to process your text

Common Uses

• Line Numbers - Remove line numbers from code or text (e.g., "1. ", "Line 42: ")
• URL Protocols - Remove "http://" or "https://" from lists of URLs
• Data Cleaning - Remove prefixes like "ID:", "Name:", etc. from data exports
• Code Formatting - Remove indentation, comment markers, or other syntax elements
• Text Formatting - Remove bullet points, dashes, or other list markers

Options Explained

• Prefix to remove - The specific text pattern to remove from the beginning of each line
• Multiple prefixes - Enter multiple prefixes to remove (one per line) if you need to remove different patterns
• Case sensitive - When checked, "HTTP://" and "http://" are treated as different prefixes
• Use regular expression - Enable regex pattern matching for advanced prefix removal
• Skip empty lines - When checked, empty lines will be preserved as-is
• Trim whitespace - Remove leading and trailing whitespace before processing
• Remove if exact match - Remove the entire line if it exactly matches the prefix

Regular Expression Tips

When using regular expressions, you can create more powerful prefix matching patterns:

• Use ^\d+\. to match line numbers followed by a period at the start of lines
• Use ^(https?://) to match both "http://" and "https://" at the start of lines
• Use ^[\s\t]+ to match and remove leading whitespace and tabs
• Use ^(>|>) to match quote markers in emails or forum posts
• Use ^(#|//|--) to match common comment markers in programming languages