What is List Compare?
Compare Two Lists runs set operations on two pasted line lists. Each side is deduped first, then compared.
Only in A
Present in A, missing from B — classic export gap check.
Only in B
New items that appeared in B.
Intersect
Overlap — shared emails, keywords, or IDs.
Union
Merge into one unique list (A order first).
Paste A and B
One item per line in each box.
→
Pick mode
Only A / Only B / Intersect / Union / Symmetric.
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Copy
Copy the result into your sheet or script.