Interleave / Zip Lines
Merge two or more lists by alternating lines. Like zipping two lists together into a single interleaved sequence.
About the Interleave / Zip Lines
Our free online Interleave / Zip Lines tool merges two or more lists by alternating lines from each. Like zipping a zipper, it takes one line from the first list, then one from the second, and so on, creating a single combined sequence. You can interleave up to 5 lists at once. Perfect for merging shopping lists, combining schedules, alternating interview responses, or creating A/B comparison output. All processing is done in your browser.
Features
- Interleave 2 to 5 lists
- Alternating line-by-line merge
- Preserves line order within each list
- Show line source labels option
- Real-time output preview
- 100% private — browser-only processing
How to use this tool
The Interleave / Zip Lines works right in your browser — no signup, no installation. Follow these steps:
- Paste each list into its own input area. Use the Add/Remove buttons to control the number of lists.
- Lines are automatically interleaved in the output as you type.
- Optionally show labels indicating which source each line came from.
- Copy the interleaved output.
Frequently asked questions
What happens if lists have different lengths?
Interleaving continues until the longest list is exhausted. Missing lines from shorter lists are simply skipped.
Can I interleave more than 2 lists?
Yes. Use the + button to add up to 5 list input areas.
Using the results
Bulk text edits that would take ages by hand happen in one step with the Interleave / Zip Lines. It applies your changes the moment you make them, entirely in the browser, so your content stays on your device and the result is ready to copy immediately.