Duplicate Word Finder

How Duplicate Word Finder works

Duplicate Word Finder handles adjacent case-insensitive repeated words and reports where the second copy starts, leaving the source unchanged for deliberate editing. The finder records every Unicode word token and zero-based match location, compares each token with its immediate predecessor, then converts matching positions to human-friendly one-based character numbers. The Duplicate Word Finder exposes its text controls so this particular convention stays inspectable instead of hiding behind an unexplained preset.

This is is a test reports the second is at character 9, identifying the likely typing mistake without deleting either occurrence. Proofreaders can catch local repeats that ordinary spellcheck often overlooks while retaining full control over whether a repetition is intentional. The Duplicate Word Finder presents a deterministic plain-text result that can be copied and compared with the worked value before it enters another workflow.

Limits and private processing

Only neighboring duplicates count. Repeated words separated by punctuation or other words are not flagged, and valid emphatic constructions may still appear. The Duplicate Word Finder performs its complete operation locally in your browser; neither the source text nor its settings are uploaded, stored remotely, or sent through an external request.