Compare Two Lists Online - Find Differences & Common Items

Q: Can I ignore case when comparing?

Yes! Check the Ignore Case option to treat Apple and apple as the same item.

Q: Is my data private?

Yes. All processing happens locally in your browser. Your lists never leave your device.

Case Sensitive

Trim Whitespace

Ignore Empty Lines

List A

0 items

List B

0 items

Comparison Results

Enter items in both lists and click "Compare Lists" to see results

Only in A

Only in B

In Both

All Unique

How to Compare Two Lists Online

Paste List A — Your first list (one item per line)
Paste List B — Your second list to compare against
Click "Compare Lists" — Instantly see the differences
View results — Items only in A, only in B, in both, and all unique

Comparison Options

🔤 Case Sensitive

When enabled, "Apple" and "apple" are treated as different items. Disable to ignore capitalization differences.

✂️ Trim Whitespace

Removes leading and trailing spaces from each line before comparing. Prevents mismatches due to extra spaces.

📭 Ignore Empty Lines

Skips blank lines in both lists. Useful when lists have inconsistent formatting.

Common Use Cases

📧 Email List Comparison

Compare subscriber lists to find new signups, unsubscribes, or overlap between different campaigns.

📊 Data Reconciliation

Match records between databases, spreadsheets, or exports to identify missing or duplicate entries.

🛒 Inventory Matching

Compare product SKUs, part numbers, or inventory lists between systems or locations.

👥 Attendee Management

Find who RSVPed but didn't attend, or compare guest lists between events.

Frequently Asked Questions

How do I compare two lists?

Paste your first list in List A, second list in List B, then click "Compare Lists". Results show items unique to each list and items in common.

Can I ignore case when comparing?

Yes! Uncheck "Case Sensitive" to treat "Apple" and "apple" as the same item.

What do the results mean?

"Only in A" shows items exclusive to List A. "Only in B" shows items exclusive to List B. "In Both" shows common items. "All Unique" combines everything without duplicates.

Is my data private?

Absolutely. All processing happens locally in your browser. Your lists never leave your device.

🔒 100% Private & Secure

All list comparison happens locally in your browser—your data is never uploaded. Safe for sensitive customer lists, confidential data, or proprietary information.

🔀 Compare Lists