Change List Length

Yes. All processing runs in your browser with plain JavaScript – the list is never uploaded or logged. No network request touches your paste.

Yes – completely free with no registration, no usage limits, and no hidden fees. Use it for personal or commercial work.

Pad fills with placeholder items (Item 4, Item 5 … using the prefix you chose). Cycle repeats your original items in the same order (apple, banana, cherry, apple, banana …). Pad keeps the new entries visibly fake; cycle keeps them plausible.

Truncate cuts the list to exactly target items by keeping the first N. If target is greater than or equal to the current length, the list passes through unchanged – truncate never adds items.

Yes. Pick any input separator (or let Auto-detect choose for you) and a different output separator – tab in, comma out, pipe in, newline out, whatever you need.

Trims whitespace from each item and drops empty entries before adjusting the length. Useful when pasting from clipboards that add stray blank lines, or when using space as a separator with double spaces.

Up to 100,000 items runs in well under 100ms on a modern laptop. Beyond that the tool refuses with a clear error rather than silently freezing the page.

Yes. The “Placeholder prefix” field turns into the first word of every added item – so Row gives you Row 4, Row 5, … Leave it empty to add blank items instead.

Preparing test data with an exact row count, generating synthetic datasets, creating placeholder bullet lists in docs, truncating long lists to a preview, or cycling a small list to match the row count of another dataset.

Yes in every mode. Truncate keeps the first N in original order, pad appends after the originals, and cycle repeats the sequence starting from item 1 each time.