Remove Lines Containing...
Filter out or retain only lines containing specific words, substrings, or regular expressions. Perfect for log filtering and data cleanup.
How to Use Remove Lines Containing...
- Paste Your Text: Paste your multi-line text or log file into the workspace.
- Enter Filter Pattern: Type the word, phrase, or regular expression to match.
- Select Action: Choose whether to remove matching lines or keep only matching lines (invert filter).
Key Features & Capabilities
- Include or Exclude Mode: Easily toggle between deleting matching lines or retaining only matching lines.
- RegEx Support: Filter using standard strings or advanced regular expression patterns.
- Match Count Tag: Real-time badge showing how many lines were filtered out.
- 100% In-Browser Privacy: Your text never leaves your device or touches an external server.
Common Use Cases
- Server Log Analysis: Isolate `[ERROR]` or `[FATAL]` lines, or strip out noisy `[DEBUG]` logs.
- Data Cleaning: Remove comments, empty lines, or lines containing unwanted keywords.
Frequently Asked Questions
- Can I filter lines using regular expressions?
- Yes, enable the Use RegEx option to filter lines by complex patterns, email regex, or IP addresses.
- How do I keep ONLY lines that contain a word?
- Check the "Invert (Keep only matching lines)" checkbox.
Related Text Utilities
Remove Duplicate Lines
Identify and remove redundant lines with optional case sensitivity
Regex Pattern Extractor
Extract all occurrences or capture groups matching a regular expression
Find and Replace Text
Locate and replace strings or regular expressions across your text
Sort Text Lines
Sort lines alphabetically (A-Z, Z-A), numerically, by length, or natural order