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MGToolbox

Duplicate Text Finder

Analyzer100% In-Browser

Find repeated lines and paragraphs in any text — normalized matching, occurrence counts, and one-click cleanup.

Your text stays on this page — nothing is transmitted
Zero Data Collection
Files are processed 100% locally
Instant Client-Side Speed
Zero network upload delays
Free & Unlimited
No registration or credit card needed

Find Duplicate Lines & Repeated Paragraphs in Text

Paste a list, article, or manuscript and instantly see every line or paragraph that appears more than once: where each duplicate group occurs (line numbers), how many times, and which variant differs only by case or stray whitespace.

Normalization (lowercasing, whitespace collapsing, punctuation trimming) is optional per run, and a one-click cleanup button returns the text with duplicates removed. Everything happens in your browser — safe for confidential documents.

Frequently Asked Questions

Everything you need to know about using Duplicate Text Finder safely and efficiently.

With normalization on, "Hello World" and "hello world" count as the same line — case and whitespace differences are ignored. With it off, only exact matches count.
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