A worked example
Paste last month’s subscriber export into the first box and this month’s into the second. "Only in the first" is everyone who left, "only in the second" is everyone who joined, and "in both" is the list that stayed — three answers from one paste, and none of them needing a spreadsheet formula.
Sets, not diffs
This compares membership, not sequence. Two exports of the same list in a different order are identical here, while a diff would call almost every line changed. That is the difference between asking "is this entry present" and "did this line move", and lists want the first question.
More free text tools
- Word counterLive word count with reading time, sentences and paragraphs.
- Character counterCharacters with and without spaces, against X, SMS and SEO limits.
- Letter counterCount letters only, with a frequency breakdown for puzzles.
- Text cleanerStrip extra spaces, blank lines and invisible characters in one pass.
- Remove line breaksRejoin text that a PDF or email broke into short lines.
- Text compareDiff two versions and see what was added, removed and left alone.
Frequently asked questions
Is this list comparison free?
Yes, with no account and no limit on how many entries you paste.
How is this different from the text compare tool?
Text compare asks what changed between two versions, so order matters and a moved line reads as an edit. This asks whether an entry is present, so order is irrelevant — which is the right question for two exports of the same list.
Does the order of my lists matter?
No. The same entries in a different order give the same answer, because each list is treated as a set rather than a sequence.
What happens to duplicates inside one list?
They collapse to one entry, and the counts above the results show distinct entries per side. If you want to know what repeated within a single list, use the duplicate remover.
Is capitalisation ignored?
By default, yes — two exports of the same mailing list rarely agree on capitals, and "Alice@example.com" is the same subscriber as "alice@example.com". Turn on "Match case" for identifiers and codes.
Are my lists uploaded?
No. The comparison runs in your browser, so customer lists, invite lists and internal URLs never leave your device.