Free · browser-only · 4 match modes
Remove Duplicate Lines
Quick Answer: Paste a list, get unique lines instantly with 4 match modes — keep first or last, case-insensitive, trim. Stats in → out → removed, all local.
What is a duplicate remover for text?
A duplicate remover extracts unique lines from a list. Unlike a duplicate photo remover (<100/mo, for images), this remove duplicate lines tool works on text — email lists, keyword lists, log lines, one item per line. Search volume: duplicate remover >100 (Medium), spotify duplicate remover >100 (Easy, for playlists), outlook duplicate remover >100 (Medium, for emails). This page targets the text niche: paste 100 or 10,000 lines, get unique lines back without uploading to a server.
Note: if you searched spotify duplicate remover or google photos duplicate remover, this tool is for text lines, not media — but the logic (keep first vs last) is identical.
4 match modes — exact, case-insensitive, trim
| Mode | Example input | Result |
|---|---|---|
| Exact (default) | apple / Apple | 2 lines — case matters |
| Case-insensitive | apple / APPLE | 1 line — Hello = hello |
| Trim whitespace | " apple " / "apple" | 1 line — ignores spaces |
| Keep last | a, b, a → b, a | Last wins position |
Use email duplicate remover mode (trim + case-insensitive + keep first) to clean mailing lists: [email protected] and [email protected] become one.
How to remove duplicates in 20s
- Paste list — one item per line (works with 20k+ lines).
- Pick keep first (preserve order) or keep last, toggle case/trim — watch stats
in → out → removed. - Click Copy deduped. No login, no upload, safe for outlook duplicate remover workflows.
When to use vs other removers
- Text lists — this tool (lines)
- Spotify playlist duplicate remover — use Spotify directly (>100 Easy)
- Google Photos duplicate remover — use Google Photos (<100)
For text, this is the best free duplicate remover online — no install.
FAQ — duplicate remover online
Should I keep the first or last duplicate?
Keep first preserves original order (default) — ideal for email lists. Keep last moves the surviving line to its last occurrence, useful when the newest entry is most up-to-date.
Is this duplicate remover private?
Yes — all deduping runs locally via Set. No upload. Safe for email duplicate remover, outlook duplicate remover, and log files. Verify in Network tab: zero requests.
Can it handle case differences and whitespace?
Yes — toggle Case sensitive off to treat Hello and hello as the same, and Trim whitespace on to ignore leading/trailing spaces. Four match modes cover exact, case-insensitive, trim, or both.
What is the best free duplicate remover for text?
The best free duplicate remover for text keeps your data local, shows stats, and lets you choose keep-first/last. Text Tools does that plus works offline after load.
Does it sort after removing duplicates?
Order is preserved by default. For sorted output, copy the deduped result and sort elsewhere — this keeps the tool simple and fast for 10k+ lines.
Related: Word Counter · Case Converter