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Even Line Extractor

Extract even-numbered lines from text content with support for various indexing methods and custom criteria

Key Facts

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

Overview

The Even Line Extractor is a specialized text processing tool designed to isolate specific lines from your content based on numerical indexing or alternating patterns. Whether you are cleaning up datasets, parsing logs, or filtering structured text, this utility provides precise control over which lines are extracted and how they are formatted in the final output.

When to Use

  • •When you need to separate alternating data entries from a single text file.
  • •When cleaning up raw logs or code snippets that contain redundant or unwanted lines.
  • •When reformatting structured text into specific layouts like CSV, JSON, or tables for further analysis.

How It Works

  • •Paste your source text into the input area.
  • •Select your preferred counting method, such as 1-based indexing or alternating patterns.
  • •Configure optional settings like trimming whitespace or including empty lines to refine your results.
  • •Choose your desired output format and click process to generate the extracted content.

Use Cases

Parsing interleaved log files to isolate specific event types.
Converting raw text lists into structured JSON or CSV formats for database imports.
Filtering out header or metadata lines from exported reports to focus on core data.

Examples

1. Extracting Data from Interleaved Logs

System Administrator
Background
A server log file contains alternating lines of timestamps and error messages, making it difficult to read the errors in isolation.
Problem
Need to extract only the error message lines (even-numbered lines) to analyze system failures.
How to Use
Paste the log content, select '1-based' indexing, and set the output format to 'Plain Text'.
Example Config
countingMethod: 1-based, startIndex: 2, outputFormat: simple
Outcome
The tool outputs a clean list containing only the error messages, removing all timestamp lines.

2. Formatting List Data for CSV

Data Analyst
Background
A raw text file contains a list of items where every second line is a description that needs to be moved into a separate column.
Problem
Need to extract the description lines to pair them with the main items in a CSV format.
How to Use
Upload the text file, select '1-based' indexing, and choose 'CSV' as the output format.
Example Config
countingMethod: 1-based, outputFormat: csv
Outcome
A structured CSV output is generated, allowing for easy import into spreadsheet software.

Try with Samples

text
Markdown Link Extractor Samples
Sample Markdown documents with various link types for testing the Markdown Link Extractor tool
title token extractor
text
Phone Number Extractor Samples
Collection of mixed text containing phone numbers from various countries for extraction testing
title token extractor
text
Changelog Extractor Samples
Various changelog formats for testing changelog parsing and extraction tools
title token extractor
text
Duplicate Line Samples
Sample files with various types of duplicate lines for testing duplicate removal tools
title token line
text

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FAQ

Can I extract lines starting from a specific number?

Yes, you can adjust the 'Start Index' field to define exactly where the extraction process begins.

Does this tool support non-standard indexing?

Yes, you can choose between 1-based, 0-based, odd-based, or custom pattern indexing to suit your specific data structure.

Can I keep the original line numbers in the output?

Yes, by enabling the 'Preserve Original Line Numbers' option, the tool will retain the original indexing of your source text.

What output formats are available?

You can export your results as a numbered list, table, JSON, CSV, plain text, or a before/after comparison.

Will empty lines be included by default?

No, empty lines are excluded by default, but you can toggle the 'Include Empty Lines' checkbox to keep them in your output.

API Documentation

Request Endpoint

POST /en/api/tools/even-line-extractor

Request Parameters

Parameter Name Type Required Description
textInput textarea Yes -
countingMethod select Yes -
startIndex number No -
trimLines checkbox No -
includeEmptyLines checkbox No -
preserveLineNumbers checkbox No -
showLineNumbers checkbox No -
outputFormat select Yes -

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-even-line-extractor": {
      "name": "even-line-extractor",
      "description": "Extract even-numbered lines from text content with support for various indexing methods and custom criteria",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=even-line-extractor",
      "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]