Interleave / Zip Lines
Merge two or more lists by alternating lines. Like zipping two lists together into a single interleaved sequence.
About This Free Online 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 of Our Interleave / Zip Lines
- 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 the Interleave / Zip Lines
Using this tool is simple and requires no signup or registration. 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 About Interleave / Zip Lines
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.
Why Choose Text Toolbox?
Text Toolbox provides free, private, and instant online text tools. Unlike other text utility websites that require signup accounts or send your data to servers, all our tools process your text entirely in your browser. This means your content never leaves your device — we cannot see it, store it, or share it. Our tools are fast, lightweight, and work on any device with a modern web browser.