# Remove Duplicate Lines - Complete Guide

> Remove repeated lines from a list in your browser, with ignore-case, trim, keep first or last, and sorting options.

Source: https://edesy.in/docs/tools/text-tools/remove-duplicate-lines

[Remove Duplicate Lines](https://edesy.in/tools/remove-duplicate-lines) removes repeated lines from a list and leaves one copy of each. Your text is processed in your browser and is not uploaded.

## How to Use

1. Paste your list into **Your text**, one item per line. The **Result** updates as you type.
2. Turn on the options you need:
   - **Ignore case** so "Shoes" and "shoes" count as the same line.
   - **Trim spaces before comparing** so leading and trailing spaces don't count.
   - **Remove empty lines** to drop blank lines.
   - **Show only duplicates** to list just the lines that were repeated.
3. Under **Keep**, choose **First** (default) or **Last** copy of each repeated line.
4. Under **Sort**, choose **None** (original order), **A-Z** or **Z-A**.
5. Click **Copy result** or **Download .txt**.

## Things to know

- **Default matching**: with no options on, two lines match only if they are exactly the same, including capitals and spaces.
- **Original text is kept**: with Ignore case or Trim on, the kept line keeps its original text; only the comparison changes.
- **Counts**: the tool shows Total lines, Unique lines and Duplicates removed, plus how many empty lines were removed when that option is on.
- **Sorting**: numbers sort in natural order, so item2 comes before item10.
- **Download**: the file is saved as unique-lines.txt.
- **Privacy**: everything runs in your browser.

## Tips

- When merging email or phone lists from two sheets, turn on Ignore case and Trim spaces before comparing to catch near-duplicates.
- Use **Clear** to empty the input and start again.

**Related:** [Word Counter](https://edesy.in/tools/word-counter), [Case Converter](https://edesy.in/tools/case-converter)