ProToolBox

Remove Duplicate Lines Free - Live Dedupe & Copy

Paste one item per line. The sticky panel shows how many duplicate rows drop out, line and character before→after, words, read time, and a copy-ready unique list-use Copy unique lines for the list only. Everything stays in this tab until you copy.

Remove duplicate lines input and live preview

Lists, logs, emails, and CSV-style paste-big duplicate count, full stats grid, readonly unique output, and Copy unique lines in one flow.

1 Paste lines · 2 Edit · 3 Live unique preview · 4 Copy unique lines

Live preview

Rows match after trim; case matters (apple ≠ Apple). First row wins. Extra blank lines collapse to one empty row.

Dedupe stays in this tab; use Copy unique lines when you need the list elsewhere.

Your deduped list will show here.

Paste one item per line on the left-the big number is how many duplicate rows were removed. Lines, characters, words, read time, and unique output update live-no upload.

Save results as:

Next: Sort A-Z · Shuffle lines · All text tools · All tools

  • Deduplication runs locally in this browser tab
  • We do not receive your paste for processing
  • Free, no sign-in

Length & format benchmarks

Use these as sense checks while you edit-not rigid rules. Every app counts characters and “words” a little differently.

  • Blog posts: ~800-2,000 words is a common full-article band before you split into a series.
  • SEO explainers: ~1,000-2,500 words when you need depth, headings, and internal links without filler.
  • Social: ~100-300 characters for a tight single post; threads need clear breaks.
  • Academic abstracts: often ~150-300 words-always match the venue PDF.

Try next: Reading time · Word counter · Keyword density · Sentence counter · Character counter · Text length

What this is for

Use Remove Duplicate Lines for mailing lists, SKU exports, log snippets, and any one-item-per-line paste where repeats should disappear but order matters.

Remember: First occurrence wins; later identical trimmed rows are removed.

Bookmark this page-deduping exports, mailing lists, and log snippets is a repeat task. One tab beats re-running five different sites.

Built for repeated rows and noisy paste

Spreadsheet exports, mailing lists, and stack traces often carry the same line many times. This tool keeps order, keeps the first copy of each trimmed row, and shows exactly how many duplicates disappeared-locally, with no server round-trip.

How it works

  1. Paste or type in Your lines. Live preview updates instantly (sticky on wide screens).
  2. Scan the large duplicate rows dropped count first, then lines and characters before→after, words, read time, and the unique output box.
  3. Read the gray What this means / Next note, then Copy unique lines for the list only.

What each metric means

  • Duplicate rows dropped - input lines minus unique lines after trim-based matching.
  • Lines / characters (before → after) - length and row count shrink when repeats (or extra blank rows) disappear.
  • Words / read time - computed on the unique output (~200 wpm); pair with Reading time for tuning.

Privacy: Your paste is not sent to us for deduplication; it stays in this tab until you reload, clear, or copy it yourself.

FAQ

  • Is my text uploaded? No-everything runs in your browser until you choose Copy unique lines.
  • Do I need an account? No sign-in; the tool is free.
  • Are blank lines deduped? Yes-trimmed empty rows share the same key, so you keep one blank line.
  • What does Copy unique lines include? Only the deduplicated text from the preview-not the stats block.
  • Can I use it on my phone? Yes-input and unique preview stack; use Copy unique lines when the list looks right.

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