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Filter Text Lines

Quickly return text lines that match a pattern or a regex

The pattern to match against (not used for some filter types)

Match case when filtering (not applicable to all filter types)

Show lines that do NOT match the criteria

Key Facts

Category
Text Processing
Input Types
textarea, select, text, checkbox
Output Type
text
Sample Coverage
4
API Ready
Yes

Overview

Filter Text Lines is a powerful utility designed to help you quickly extract, isolate, or remove specific lines from large blocks of text based on custom patterns, regular expressions, or predefined formats.

When to Use

  • •When you need to extract specific data entries from large log files or raw datasets.
  • •When you want to clean up text by removing empty lines or lines that do not meet specific criteria.
  • •When you need to verify data integrity by isolating lines that match specific formats like emails or URLs.

How It Works

  • •Paste your source text into the input area.
  • •Select your desired filter type, such as 'Contains Text', 'Regular Expression', or 'Email Format'.
  • •Configure additional settings like case sensitivity or match inversion to refine your results.
  • •Click the process button to instantly view or copy the filtered lines.

Use Cases

Extracting specific error codes from server log files.
Cleaning lists of contact information by filtering for valid email addresses.
Isolating specific configuration lines from a large settings file.

Examples

1. Extracting Error Logs

System Administrator
Background
A server log file contains thousands of lines of informational messages mixed with occasional errors.
Problem
Manually searching for 'ERROR' tags is inefficient and prone to human error.
How to Use
Paste the log content, select 'Contains Text', enter 'ERROR' as the pattern, and click filter.
Outcome
The tool returns only the lines containing 'ERROR', allowing for immediate troubleshooting.

2. Cleaning Email Lists

Marketing Specialist
Background
A raw export of customer data contains mixed entries, including invalid formats and empty rows.
Problem
Need to quickly extract only valid email addresses for a newsletter campaign.
How to Use
Paste the list, select 'Email Format' as the filter type, and set 'Match Type' to 'Exclude Empty Lines'.
Outcome
A clean, formatted list of valid email addresses ready for import into an email marketing platform.

Try with Samples

text, regex
Chinese-English Mixed Text Samples
Sample text files with mixed Chinese and English content for testing automatic spacing tools
title token text
text
Text with Date Samples
Text containing various date formats for testing date extraction and parsing
title token text
text
Text with Emoji Samples
Mixed language text containing various Unicode emojis for testing emoji extraction
title token text
text
Text with Sensitive Data Samples
Text containing various types of sensitive data for testing data masking (phones, emails, ID cards, bank cards)
title token text
text

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FAQ

Can I use regular expressions to filter text?

Yes, select the 'Regular Expression' filter type and enter your regex pattern in the pattern field.

How do I remove lines that contain specific words?

Select 'Contains Text', enter the word, and check the 'Invert Match' box to show only lines that do not contain that word.

Does this tool support case-sensitive filtering?

Yes, you can toggle the 'Case Sensitive' checkbox to ensure your filter respects character casing.

Can I filter out empty lines?

Yes, set the 'Match Type' option to 'Exclude Empty Lines' to automatically strip blank lines from your output.

Is there a limit to the amount of text I can process?

The tool is designed for high-performance text processing, though extremely large files may be limited by your browser's memory capacity.

API Documentation

Request Endpoint

POST /en/api/tools/text-line-filter

Request Parameters

Parameter Name Type Required Description
textInput textarea Yes -
filterType select Yes -
pattern text No The pattern to match against (not used for some filter types)
matchType select Yes -
caseSensitive checkbox No Match case when filtering (not applicable to all filter types)
invertMatch checkbox No Show lines that do NOT match the criteria

Response Format

{
  "result": "Processed text content",
  "error": "Error message (optional)",
  "message": "Notification message (optional)",
  "metadata": {
    "key": "value"
  }
}
Text: Text

AI MCP Documentation

Add this tool to your MCP server configuration: 

{
  "mcpServers": {
    "elysiatools-text-line-filter": {
      "name": "text-line-filter",
      "description": "Quickly return text lines that match a pattern or a regex",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=text-line-filter",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

You can chain multiple tools, e.g.: `https://elysiatools.com/mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp`, max 20 tools.

If you encounter any issues, please contact us at [email protected]