What is list intersection?

List intersection returns only items that appear in BOTH lists. If List A is [apple, banana, cherry] and List B is [banana, date, cherry], the intersection is [banana, cherry].

What is list difference?

List difference (A minus B) returns items in List A that do NOT appear in List B. If A is [apple, banana, cherry] and B is [banana, date], A − B is [apple, cherry].

List Set Tools - Free Online List Set Operations Tool

How to Use the List Set Operations Tool

Paste your first list into List A and your second list into List B - one item per line.
Pick a mode: Union (all unique items from both), Intersection (items in both), A minus B / B minus A (difference), Symmetric Difference (items in either but not both), or Zip (interleave line by line).
The result updates instantly - copy it or download as a.txt file.
Use the Case-sensitive toggle if your items differ only by capitalisation.

List Set Tools allow you to merge, intersect, diff, and zip two text lists in seconds. Completely free and browser-only: your data never leaves your device, no uploads involved. This list comparison utility is perfect for developers needing to handle union, intersection, and symmetric difference operations on large data sets without using a database.

How the List Comparison Tool Works

List Set Tools is a browser-side text utility built for speed and simplicity. This interleave lists tool handles edge cases - empty inputs, special characters, large datasets - without crashing or producing silent incorrect output. Whether you are using it to deduplicate lists or perform complex set operations, this robust text list comparison tool provides instant, private results.

Accepts large inputs - no size limits imposed by this tool
Handles edge cases: empty fields, special characters, and Unicode
Copy-to-clipboard and file download for every output
Works on Chrome, Firefox, Safari, and Edge without any extensions

Frequently Asked Questions

What does list-set-tools do?

List Set Tools allow you to merge, intersect, diff, and zip two text lists.

What input does list-set-tools accept?

Paste text directly into the input field, or type your data. Most operations handle Unicode, special characters, and multi-line inputs without issue.

How large an input can I process?

There is no hard limit imposed by this tool. Very large inputs (multi-MB text) process within your browser's available memory. For files larger than 50 MB, a command-line tool may be faster.

Can I download the output?

Yes - every output panel includes a Copy to Clipboard button and a Download as file option. Outputs are saved as plain text or the appropriate file format for the operation.

From managing configuration files to synchronizing data sets, this essential developer tool simplifies your workflow. Bookmark this List Set Tools for a reliable and secure way to perform list set operations online.

List Set Tools online

Merge, intersect, diff, and zip two text lists - runs in your browser