Text Deduplicator to Remove Duplicate Lines
Remove duplicate lines from pasted text with case-sensitive matching, whitespace trimming, counts, and copy-ready output.
The text deduplicator keeps the first occurrence of each line and removes repeated lines.
Case-sensitive and trim options control how lines are compared.
Use one item per line
Line-based input works best for IDs, URLs, names, keywords, or copied rows.
Pick matching rules first
Decide whether capitalization and whitespace should be considered part of the value.
Example
alpha, beta, alpha becomes alpha, beta.
Assumption
Each meaningful item is on its own line.
Limitation
It does not fuzzy-match typos or near-duplicates.
Keyword lists
Remove repeated SEO or content keywords.
URL lists
Clean copied URL batches.
Email lists
Prepare unique line lists before import.
Data cleanup
Dedupe pasted rows without opening a spreadsheet.
Does the tool preserve line order?
Yes. It keeps the first occurrence of each line and removes later duplicates.
Can matching be case-sensitive?
Yes. Turn on case-sensitive matching if Beta and beta should be treated as different values.
Can whitespace be ignored?
Yes. Keep trim whitespace enabled to ignore leading and trailing spaces.
Is pasted text uploaded?
No. Deduplication runs locally in the browser.
Suggested workflow
Text cleanup workflow
Dedupe lines, clean whitespace, then sort or analyze text.