Zip Two Lists
Join lists together item by item. Runs entirely in your browser, so your data never leaves your device.
0 chars · 0 lines
Output
The result appears here as you type.
How to use Zip Two Lists
- 1. Paste the first list. Put one item per line into the main input pane. Each line will be paired with the item at the same position in the second list.
- 2. Add the second list and Joiner. Paste the second list into its field, then set the Joiner, such as a comma, to place between each pair on the same line.
- 3. Decide how to handle uneven lengths. Turn on Pad the shorter list with empty items if the lists have different lengths, so every line from the longer list still gets an output row.
- 4. Copy the paired lines. Copy the result, one pair per line joined by your chosen separator, into a CSV, spreadsheet, or script that expects position-matched values.
When to use Zip Two Lists
Zip Two Lists combines two separate lists into pairs, item by item in the order they appear, the same way a zip function works in most programming languages. Use Zip Two Lists whenever you have two related columns of data that need to become one combined line each.
- Building CSV rows from two separate columns. You have a list of names and a separate list of ages that need to become comma-separated rows. Zip them together with a comma joiner to produce ready-to-paste CSV lines.
- Pairing keys with values for a config file. You typed out a list of setting names and a matching list of values in two passes. Zip them with an equals sign joiner to produce key=value lines.
- Matching questions to answers for a quiz export. A quiz has its questions in one list and its correct answers in another, in the same order. Zip them together to produce one line per question-answer pair.
- Combining a product list with its prices. You have product names in one list and prices in another entered separately. Zip the two together with a comma to build a simple price sheet.
Examples
Zip with a second list of 1 and 2
Input
apples bananas
Output
apples,1 bananas,2
About the Zip Two Lists tool
Zip Two Lists runs as plain JavaScript in your browser tab, with no server behind it. Join lists together item by item. Whatever you put in stays on your device from start to finish.
The tool is part of EditSafely's List Tools section, 114 single-purpose utilities built around the same idea: open the page, get the result, keep your data to yourself.
You can shape the output with 3 settings, including Second list (one item per line), Joiner and Pad the shorter list with empty items, and the result refreshes the moment you change one. A worked example further down the page shows exactly what the tool produces for a real input.
That local-first design has practical benefits beyond privacy. The tool keeps working on a flaky connection once the page has loaded, results are instant because nothing round-trips to a server, and it is safe to use with confidential material.
Frequently asked questions
Is Zip Two Lists free to use?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Is it safe to paste sensitive or confidential data?
Everything happens locally. Your browser downloads the tool's code once, then does all the processing itself; nothing you enter is transmitted, stored or logged. You can even go offline after the page loads and it will still work.
How much text can I process at once?
There is no fixed limit. Because the work happens on your own device rather than on a shared server, the practical ceiling is your machine's memory, which comfortably handles inputs far larger than typical online tools allow.
Do I need to sign up or install anything?
No. The tool works in any modern browser on desktop, tablet or phone. There is no account to create, no extension to add and no software to install.
How do I use the result?
The output panel has a one-click copy button, and you can keep refining the input while you work; the result updates in place as you type.