Remove Duplicate Words from Text

The key difference is what each tool treats as a single unit. This Remove Duplicate Text tool scans for individual words separated by spaces and removes any word it has already seen in the text. The Remove Duplicate Lines tool works at the row level — it only checks entire lines separated by a newline and removes matching rows. Use this tool for word-level deduplication and the Lines tool for list or row-level cleanup.

When "Ignore case" is enabled, the tool treats words like Apple and apple as identical and removes the duplicate regardless of capitalisation. When it is disabled, the comparison is case-sensitive, so Apple and apple are treated as two entirely different words and both are kept. For most general text cleanup tasks, enabling this option gives you the most accurate and thorough deduplication result.

No, never. All text processing happens completely client-side inside your browser using JavaScript. Nothing you paste is ever sent to, stored on, or processed by our servers. You can safely use this tool with private documents, internal content, keyword research data, or any sensitive text without any privacy concerns.

Technically yes, but keep in mind that natural language uses the same words repeatedly by design — removing every duplicate word from an article would make it unreadable. This tool is best suited for structured data such as keyword lists, tag clouds, word collections, product attribute lists, or any content where true word-level uniqueness is the goal. For prose writing, a grammar or style editor would be more appropriate.

This depends on how the tool splits words — typically by spaces. This means a word like apple, with a trailing comma is treated as a different token from apple without one. If your text contains punctuation attached to words, it is recommended to clean up punctuation first using a symbol remover tool before running the duplicate text removal, to ensure the most accurate word-matching results.

Yes. Since all processing runs locally in your browser, there are no server-side size restrictions. You can paste thousands of words — such as a combined keyword export from multiple SEO tools, a merged tag list, or a large word frequency dataset — and the tool will deduplicate everything instantly without any upload delay or slowdown.