Text cleaner — remove duplicates, spaces and line breaks

Clean pasted text with 11 operations: remove duplicate or empty lines, trim spaces, sort, join, number lines, or find and replace.

Output
Enter text to see output.

What to know

Clean is a line-oriented workshop. Pick one of eleven operations from the Operation menu and the Output panel updates as you type: remove duplicate lines (the default), remove duplicate words, remove empty lines, trim whitespace, remove punctuation, sort lines, join lines, number lines, find and replace, add a prefix or suffix, and remove line breaks.

The input is split at every line break, Windows or Unix style, and each operation either looks at whole lines (duplicates, empty lines, sorting, joining) or rewrites them one at a time (trimming, numbering, prefixing). Remove punctuation and find and replace work on the whole text instead.

Several operations look alike, so choose by the detail. Remove empty lines keeps indentation, trim whitespace squeezes runs of spaces to one, join lines lets you type your own separator, and remove line breaks always joins with a single space. Only one operation runs per pass, so chain steps by copying the output back into the input box.

Example: a pasted list with apple, Apple, banana, banana on four lines becomes apple and banana after remove duplicate lines, and numbering then turns that into 1. apple and 2. banana. Copy the Output panel or save it as chatcument-text-output.txt.

Worked example

Choose the operation that matches the problem. Removing duplicate lines keeps the first occurrence; removing empty lines preserves repeated content; joining lines turns a list into one line. The example uses the default duplicate-line operation.

Input

blue
green
blue
coral

Output

blue
green
coral

Each operation transforms the original input. To combine operations, copy the output back into the input before choosing the next operation. Keep a copy of the original text.

Clean a pasted list without losing its original meaning

Choose the change you need before cleaning the text. Removing repeated rows, deleting blank rows and joining lines solve different problems. For a keyword list, keeping the first occurrence may be useful; for a frequency log, repeated rows may be the data you need to preserve.

Remove duplicate lines while keeping the first occurrence

Suppose your campaign list contains three lines: spring launch, summer launch, spring launch. Duplicate-line removal returns spring launch followed by summer launch. It keeps the first occurrence in the original order; it does not sort the list alphabetically.

By default, comparison ignores leading and trailing whitespace and letter case. Alpha and alpha therefore count as the same entry. The first original line is preserved, so comparison that ignores surrounding whitespace is not the same as trimming the retained output. Use the case-sensitive option when capital letters distinguish your entries. URL paths and identifiers can be case-sensitive: decide the comparison rule before cleaning them.

Blank lines and extra spaces need different operations

Remove empty lines deletes rows with no content, including whitespace-only rows, while keeping repeated non-empty entries. Choose it when you want a compact list but still need repeated items. Duplicate-line removal is a different operation and changes repetition counts.

Trim whitespace removes each line’s leading and trailing whitespace and turns runs of two or more spaces or tabs into one space. Line breaks remain, but indentation and repeated tab separators can change. Avoid this operation when whitespace defines code structure or empty columns in a tab-separated table.

Handle copied PDF paragraphs in small sections

Text copied from a PDF may break at the end of every visual line. Joining the lines of one paragraph can help, but joining a whole page may mix headings, lists and separate paragraphs. Work with one coherent block at a time and compare it with the original.

Whitespace cleanup does not correct OCR mistakes or restore missing letters. A cleaner-looking result can still contain a zero where the original used the letter O. Tables also require a separate check of their row and column relationships.

Check the result before replacing your source

Keep the original until you have compared the first entry, last entry and a known duplicate in the result. If order matters, verify that the first occurrence appears where you expect. If repetition matters, remove blank lines rather than duplicate lines.

For a multi-step cleanup, inspect the result after each operation. That makes it easier to identify whether trimming, deduplication or joining caused an unexpected change. Copy the finished text only after the result matches your intended structure.

Continue with the task you need

  • Repeated entries in a keyword list

    Keep the first occurrence and original order. Remove duplicate lines

  • Blank rows between useful entries

    Keep repeated content and remove empty rows. Remove empty lines

  • Accidental padding and repeated spaces

    Clean spacing while keeping line breaks. Trim whitespace

Written by Chatcument · Based on product behavior on September 8, 2026

Choose a specific task 11
Related tools 4
How to use Text cleaner — remove duplicates, spaces and line breaks
  1. Open the Operation menu and choose the job, such as Sort lines or Join lines.
  2. Paste a three-line sample such as pear, apple, fig into the Text input box to see the effect.
  3. Fill in any extra fields that appear for that operation, such as Find, Prefix or Separator between lines.
  4. Copy the Output panel, or press the download icon to get a .txt file, then press Reset before starting a different job.

Quick answers

How many cleanup operations are there?

Eleven: duplicate lines, duplicate words, empty lines, whitespace, punctuation, sorting, joining, numbering, find and replace, prefix or suffix, and line break removal.

Does Clean accept Windows line endings?

Yes. Both CRLF and LF are treated as a line break, so a list copied from a Windows text file splits correctly.

Can I run sort and remove duplicates together?

Not in one pass. Remove duplicates first, copy the output, paste it back into the input and choose Sort lines, because each pass applies a single operation.

Which operation should I use to merge a list into one line?

Use join lines when you need a comma or other separator between items, and remove line breaks when a single space is enough.

Does removing duplicate lines remove repeated words inside a sentence?

No. It compares complete lines. A repeated word within one sentence is not removed by the duplicate-line operation.

Why do Alpha and alpha become one line?

Duplicate-line comparison ignores letter case by default. Enable the case-sensitive option if capital letters should distinguish entries. The first occurrence is retained.

Can I remove blank lines without deleting repeated entries?

Yes. Choose Remove empty lines. It removes rows containing only whitespace or no content, while repeated non-empty lines remain.

Is this text cleaner an OCR correction tool?

No. Cleaning spaces and line breaks does not correct recognition errors, missing letters or a copied table’s column relationships. Compare the content with its source.