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 Filter lines that match a string

Efficiently filter and organize your CSV files and text data with our powerful online tool. Whether you need to extract specific records from large datasets, remove unwanted entries, or group matching lines together, our filter supports multiple CSV separators (comma, semicolon, tab, pipe, or custom), case-sensitive searching, and flexible filtering modes. Perfect for data analysts, researchers, and anyone working with structured text files. No software installation required - simply paste your data or upload files directly in your browser.


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Options

⭐ Filter Lines with String - Explanation & Examples

The Filter Lines with String tool allows you to quickly extract only the lines that contain a specific word or text. It is ideal for searching, cleaning, and analyzing large blocks of text or line-based data.

⭐ What Does This Tool Do?

With the Filter Lines with String tool, you can:

  • Paste or upload line-based text
  • Filter lines that contain a specific string
  • Quickly narrow down large datasets
  • Preview filtered results instantly
  • Process text directly in your browser

⚙️ How It Works

Filtering lines is straightforward:

  1. Paste your text or upload a file.
  2. Enter the word or string you want to filter by.
  3. The tool scans each line individually.
  4. Only lines containing the specified string are kept.
  5. Copy or download the filtered output.

🔎 Example: Filtering Lines

Original Text:

error: file not found
info: process started
warning: low memory
error: access denied

Filter String: error

Filtered Output:

error: file not found
error: access denied

⭐ Why Use This Tool?

  • Quick searching: Find relevant lines instantly
  • Efficient cleanup: Remove unrelated lines from datasets
  • Simple and fast: No scripting or advanced tools needed
  • Browser-based: No installation required

🔎 Practical Use Cases

  • Filtering log files by keywords
  • Extracting specific URLs or domains
  • Finding errors or warnings in system output
  • Cleaning large text lists

⚠️ Tips for Best Results

  • Use specific strings for more accurate filtering.
  • Check case sensitivity if available.
  • Ensure each item is on a separate line.

🔎 Try the Tool

Paste your text and instantly filter lines containing a specific string. A fast and effective way to search and clean line-based text.

This tool is also known as

  • filter lines containing text
  • find lines with keyword online
  • keep lines that match string
  • text line filter tool
  • search and filter multiline text

Frequently Asked Questions

It allows you to quickly extract or isolate lines from your text or CSV data that match a specific string.

Paste your text or upload a CSV file, enter the string you want to filter by, choose your separator and case sensitivity, and the tool will display all matching lines.

The tool supports commas, semicolons, tabs, pipes, and custom separators.

Yes, you can choose between case-sensitive or case-insensitive filtering depending on your needs.

Yes, the tool can either extract matching lines or filter out non-matching lines, giving you flexible control over your data.

Yes, after filtering, you can sort the lines or maintain the original order based on your preference.

Data analysts, researchers, developers, and anyone working with large structured text files or CSV data can use it to quickly filter relevant information.

Yes, you can copy the filtered output directly to your clipboard or download it as a .txt or .csv file.

No, all processing happens in your browser. Nothing is uploaded or saved to any server.

No, the tool is fully browser-based and works instantly without installation or registration.

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