Free Text Tool
Remove Duplicate Lines
Paste a list — emails, URLs, keywords, CSV rows — and instantly remove duplicates. Choose case sensitivity and whitespace handling. Runs entirely in your browser.
Paste lines below
One item per line
What does it mean to dedupe a list?
Deduplicating a list means removing rows that appear more than once so each value shows up exactly one time. It is one of the most common data-cleanup tasks in marketing, SEO and analytics.
Common uses
- • Deduplicate email lists before importing to an ESP
- • Clean URL exports from Screaming Frog or sitemaps
- • Remove duplicate keywords from a research export
- • Tidy up CSV rows before import into a database
How to dedupe a list
- 1. Paste your list, one item per line.
- 2. Toggle case sensitivity and whitespace trimming as needed.
- 3. Click Dedupe to remove duplicate rows.
- 4. Copy the cleaned list with one click.
Frequently asked questions
How does duplicate removal work?
Each line is compared against the others; identical lines are collapsed into a single entry while keeping the first occurrence in place.
Is the comparison case-sensitive?
You can toggle case-sensitive comparison and trim whitespace to match how strict the dedupe should be.
Is my list uploaded anywhere?
No. Everything runs locally in your browser — nothing is sent to a server.