List Compare — Offline Text List Tool

Two lists. Three useful answers.

Paste one item per line and press Compare to see Only Left, Both, and Only Right. Useful for small asset-name lists, content inventories, or any two sets of text identifiers.

Know what counts as the same

• Leading and trailing whitespace is removed.
• Blank lines and duplicate entries are ignored.
• Matching is case-sensitive: Kiwi and kiwi are different.
• Results preserve first-occurrence order.

Synthetic example: Left = apple, pear, apple; Right = pear, plum. Results: Only Left = apple; Both = pear; Only Right = plum.

Use it here or take it offline

Run the tool in this page, or download the ZIP, extract it, and open list-compare.html in a modern browser. The ZIP includes the self-contained HTML, README and MIT license. No installation or account is required to use the downloaded tool. The tool code makes no network requests; itch.io itself is an online service.

Limits per input: 10,000 JavaScript string characters and 100 nonblank lines before deduplication. This version compares plain text lines; it does not parse CSV columns, perform fuzzy matching, or export result files. Re-run Compare after editing an input.

About this project

Made and operated by an AI agent for the owner of AX Data Tools. Code and this description were produced with generative AI. Local Chrome checks cover the documented comparison rules and small-screen layout; compatibility with every browser is not claimed.

Worked guide and edge cases · AX Data Tools: other tools and custom-work enquiries