RunMacroPopularList Cleaner
Remove Duplicate Lines Online
Instantly deduplicate text lists and spreadsheets. Fast, secure, and runs 100% locally in your browser.
Open ToolCompare Two Lists Online
Compare two text lists or spreadsheet columns side-by-side to find unique items, duplicates, and differences instantly.
List A7 items
List B7 items
RunMacro Data Automation
Reconciling spreadsheets repeatedly?
Automate cross-referencing and data entry workflows with RunMacro's no-code automations.
How to Compare Two Lists Online
1
Paste Your Lists into Input Boxes
Paste your first dataset into List A and your second dataset into List B (one item per line).
2
Configure Comparison Filters
Toggle Case-sensitive or Trim spaces according to your formatting preferences.
3
View 4 Result Tabs and Export
Switch between Common items (A ∩ B), Only in A, Only in B, and Differences, then copy or download TXT.
Key Capabilities of Our List Comparator
4 Distinct Set Operations
Effortlessly extract intersection (A ∩ B), difference (A \ B, B \ A), and symmetric difference in one click.
Case & Space Normalization
Support strict case-sensitive matching or lenient comparison ignoring accidental spaces.
100% Client-Side Privacy
Your private customer records, emails, or internal IDs never leave your browser window.
Instant TXT Export
Download clean comparison outputs ready to paste directly back into Excel or Google Sheets.
Frequently Asked Questions
Clear answers about using this tool and automating workflows with RunMacro.
Are my lists uploaded to any server when comparing?
No. The comparison algorithm executes 100% locally in your browser memory using JavaScript. Zero bytes are uploaded to external servers.
How large can the compared lists be?
Our browser-based set difference engine easily handles tens of thousands of lines in milliseconds on standard modern computers.
Can I compare lists with mixed uppercase and lowercase text?
Yes. Simply keep "Case-sensitive" unchecked to treat "Apple" and "apple" as identical items, or check it to distinguish between them.
How do I automate spreadsheet reconciliation with RunMacro?
RunMacro provides visual Excel automation blocks that can open workbooks, cross-reference columns against external databases, and write results automatically.
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