List Merger and Set Comparison
Append, alternate, pair rows with a custom separator, or compare common and unique items.
Enabling local controls…
1. Source and settings
Local processing only; nothing is fetched, executed, uploaded or persisted. Each field32KiB; complete output1MiB. CPU work uses a cancellable Worker:10s startup/1s processing. Editing clears old results and exports.
Model, limits and sources
Trim lines and omit blank entries; up to 2,000 items and 32KiB per list. Append, alternate and paired modes retain duplicates. Paired modes pad the shorter list with empty cells; line-by-line uses the literal separator, zip always uses TAB and refuses embedded TAB. Set operations deduplicate, keeping first spelling and stable order. Case-insensitive sets use Unicode lowercase. Separator:32KiB; complete output:1MiB; oversized output is refused, never truncated.
Source controls inspected2026-10-19; model reviewed2026-10-19.
2. Complete result
Choose an operation and process the input.
How to use this tool
Enter local input, review the explicit options and model, then run and export the complete result.
When not to use it
Trim lines and omit blank entries; up to 2,000 items and 32KiB per list. Append, alternate and paired modes retain duplicates. Paired modes pad the shorter list with empty cells; line-by-line uses the literal separator, zip always uses TAB and refuses embedded TAB. Set operations deduplicate, keeping first spelling and stable order. Case-insensitive sets use Unicode lowercase. Separator:32KiB; complete output:1MiB; oversized output is refused, never truncated.