Compare Lists

Compare Two Lists Online

Find differences, matches and unique values between two lists instantly.

Your lists are processed locally in your browser and are never uploaded to our servers.

Compare lists

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Comparison options

How to compare two lists

  1. Paste the first list into List A.
  2. Paste the second list into List B.
  3. Adjust the comparison options if needed.
  4. Review Differences, Only A, Only B, Matches or All, then copy or download the result you need.

What the comparison results mean

The tabs show the same comparison from different angles. Results keep the order of the original lists and are never sorted automatically.

Differences
items that remain in only one of the two lists.
Only A
items or occurrences from List A that have no pair in List B.
Only B
items or occurrences from List B that have no pair in List A.
Matches
items found in both lists, shown in List A order.
All
List A, followed by values from List B that are not already represented.

Common ways to compare lists

People use this tool for everyday list tasks such as:

  • email addresses
  • customer or order IDs
  • URLs
  • product or SKU lists
  • keywords and names
  • columns copied from Excel or Google Sheets

How your data is processed

The comparison runs entirely in your browser. Raw lists and result content are never uploaded to a server.

  • Copy uses the Clipboard API only after you click the button.
  • Download creates a local text file on your device.
  • The site does not save your lists in cookies, localStorage or sessionStorage.
  • Raw input and results are not included in analytics or logging.

See the Privacy page for the full details.

Frequently asked questions

Can I compare two lists with duplicates?

Yes. Remove duplicates is enabled by default, so each list is compared as a set of unique values. Turn it off to compare repeated occurrences in each list.

Is the comparison case-sensitive?

Yes, by default. The Ignore case option changes the comparison key but not your raw text, so both spellings can match while the original input stays unchanged.

Can I compare columns from Excel or Google Sheets?

Yes. Copy a column and paste it into List A or List B. Each cell becomes one line, one item per line.

Are my lists uploaded to a server?

No. The comparison runs locally in your browser. Your list content is not uploaded to a server, not sent in network requests and not saved by the site. Copy and Download export the result only after you click the button.

What does “Only A” mean?

Only A shows the values or occurrences that exist in List A without a pair in List B, based on your current comparison options.