重複単語・キーワード整理ツール
文章やカンマ区切りのリストから重複した単語を取り除きます。
Why Deduplicating Words Matters
SEO Keyword & Tag Optimization
Search engines penalize repetitive keyword stuffing. Deduplicating tag clouds, metadata keywords, and blog tags ensures a clean, focused topical footprint without spam flags.
Academic & Essay Proofreading
Accidental word repetition (such as typing "the the" or "that that" across line breaks) is one of the most common typographical errors caught during editorial review.
Data Normalization & CSV Lists
Marketing databases, email audience segments, and category arrays often get bloated with redundant terms. Cleaning duplicate words condenses lists while reducing storage and API payload size.
Key Capabilities of 重複単語削除ツール
Multi-Delimiter Support
Deduplicate words across standard paragraphs (spaces), keyword tags (commas), or list items (newlines).
Smart Sorting (A–Z / Z–A)
Preserve natural narrative word flow or automatically organize unique words in alphabetical order.
Punctuation & Case Filters
Strip punctuation to catch duplicate words next to commas or periods, and toggle case sensitivity.
Live Deduplication Metrics
Instant tally displays total original words, unique words remaining, duplicates purged, and savings percentage.
文字数カウントに関するFAQ
How does the Remove Duplicate Words tool work?
The tool parses your input text into individual words based on your chosen delimiter (spaces, commas, or newlines), tests each token against your casing and punctuation rules, and retains only the first unique occurrence while removing all subsequent duplicates.
Can I remove duplicate words from running prose or sentences?
Yes! Set the delimiter to "Spaces (Standard Text)" and enable "Strip Punctuation" if you want punctuation like commas or periods ignored when detecting repeated words in paragraphs.
Can I clean duplicate keywords, tags, or CSV lists?
Absolutely. Select "Commas (Tags / CSV)" as your separator. The tool will parse each tag individually, strip surrounding whitespace, eliminate repetitions, and rejoin your tags with commas.
What is the difference between Case-Sensitive and Case-Insensitive deduplication?
Under Case-Insensitive mode (recommended for general text), "Marketing" and "marketing" are identified as the same word and deduplicated. In Case-Sensitive mode, capitalization is respected, preserving both variations.
Can I sort the unique words alphabetically?
Yes. You can preserve the original chronological word order or sort the resulting unique vocabulary list in ascending (A → Z) or descending (Z → A) order.
Is my text safe and private?
Yes, 100%. All deduplication operations execute strictly inside your local web browser using JavaScript. No text, keywords, or lists are ever transmitted to any remote server or stored in any database.
Explore All 14 Free Writing Tools
A complete, interconnected suite of privacy-first text analysis, counting, and editing utilities.