OnlineDiff checker

List Diff Checker

Compare lists as sequences or mathematical sets

Compare two lists separated by newlines, commas, or semicolons. Find added, missing, and common items instantly.

Comparing lists of items, IDs, emails, or SKUs often requires checking what is missing rather than line numbers. List Diff splits your inputs by delimiter and lets you compare as ordered sequences or unordered sets.

Enable Ignore order to see elements added or removed regardless of position, or turn on Unique to deduplicate before diffing.

For structured JSON arrays, JSON Diff is the better fit.

Frequently asked questions

How does List Diff compare items?

Items are split by newline, comma, or semicolon delimiter and compared as sets or sequences.

Can I ignore item order in List Diff?

Yes, enable Ignore order to check set equality regardless of item position.

Does List Diff remove duplicates?

You can enable unique item mode to eliminate repeated entries before comparison.

Are list items uploaded anywhere?

No, all list parsing and comparison runs in the local tab.