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Clean text & lists · Supporting

Compare two lists

Find items only in the first list, only in the second, or shared by both, regardless of line order.

Work stays on this deviceInput is processed in this page, not uploaded or saved. Downloads are yours to keep; refreshing clears the workspace.
Your workspace

Find what is shared or missing

Each input: up to 1 MB of UTF-8 text and 20,000 lines. Line endings are normalized to LF. An empty other list is allowed; both lists cannot be empty.

Options
Uses Unicode lowercase, not fuzzy names, aliases or accent matching.

Results show unique membership, not occurrence-by-occurrence pairing. First-seen order and list A spelling are used for shared items; duplicates are counted separately.

Ctrl / ⌘ + Enter to run

Result

Membership comparison

Run the task to review a counted result here.

Load the example to try the complete workflow.
Limits and next steps

Membership comparison is exact after your chosen normalization. It does not compare record fields or resolve fuzzy names. Use CSV comparison for structured exports. Copy a result group, or clean your source list and run again.

Reset this workspace?

This clears your input and result. Keep your draft if you still need it; chosen options remain selected.

Keep the task moving
Explore workflow →
Word counterCount words, characters, sentences and paragraphs as you type, with reading and speaking estimates.Case converterExperimental helperChange text to uppercase, lowercase, title case, or sentence case.Text diff viewerExperimental helperCompare two texts by line position and list the lines that differ.