List dedupe
Remove Duplicates From a List Online
Deduplicate one delimiter-separated list of values. Comma splitting and outer-whitespace trimming are preselected, with tab, semicolon, new line, space, or a literal custom delimiter available.
Paste/type up to 300 KB · local text files up to 10 MB per file and batch · CSV is plain text
List dedupe
A single-input tool for delimiter-separated values
Process one list with an explicit delimiter
The default treats comma-separated text as one collection and trims outer spaces, so 'apple' and ' apple' match. Switch to tab, semicolon, new line, space, or a literal custom delimiter when needed.
Use the line page for a dedicated newline workflow
New lines remain item boundaries here, but the Remove Duplicate Lines page provides clearer first/last, order, find, and count guidance when every item occupies its own line.
Email addresses and URLs use exact-value matching
The tool compares item text after the case and whitespace rules you enable. It does not validate email addresses, normalize URLs, remove tracking parameters, or merge equivalent URL forms.
Clean one delimiter-separated list
Paste one list
Use one input collection of tags, IDs, email addresses, URLs, or other text values. This page does not compare separate A and B lists.
Choose the delimiter and matching rules
Keep comma splitting or select tab, semicolon, new line, space, or a literal custom delimiter, then adjust case or trimming if required.
Choose and export a result view
Copy the distinct result, repeated values, or once-only values, or download the current full result as a TXT file.
List dedupe FAQ
Can it handle tab-separated or custom-delimited lists?
Yes. Choose Tab, or select Custom and enter a literal delimiter. Line breaks remain item boundaries even when another delimiter is selected.
Does this page compare two separate lists?
No. It processes one input collection and does not label A-only, B-only, or shared values. A two-list comparison requires a separate compare workflow.
Does it validate emails or normalize URLs?
No. Email addresses and URLs are plain text values here. Only the visible case, whitespace, retention, and result-view rules are applied.
Duplicate-removal workflows
Related duplicate-removal workflows
Each route uses the local processing engine with defaults and guidance for one clearly defined task.
Text and list dedupe
Duplicate Remover Online for Text & Lists
Choose matching, keep, sorting, and result-view rules for mixed text or list input.
Line dedupe
Remove Duplicate Lines Online
Treat each newline as one item, then remove, find, or count repeated lines.
TXT and local text files
Remove Duplicates From TXT Files
Start with local TXT or plain-text files, process them in the browser, and download the result.