Merge Lines — Combine Two Lists Side by Side
Merge two lists line by line with a custom separator. Combine first and last names, data columns, or two text blocks instantly.
Three steps to get started
Choose a separator
Select a separator to place between each pair of lines — space, comma, tab, pipe, or any custom string.
Paste List A and List B
Enter your two lists side by side, one item per line in each box.
Copy the merged result
The merged output appears instantly. Copy or download it.
Zip two lists together, line by line
When working with data, it's common to have two separate columns that need to be combined into one — first names and last names, keys and values, codes and descriptions. This tool merges two lists line by line, joining each pair with any separator you choose.
Examples of what you can build:
- Full names from separate first and last name columns
- "key: value" configuration pairs from two lists
- Email format "Name <email>" by merging names with addresses
- Tab-separated data from two columns for spreadsheet import
- SQL expressions like "column = value" from field names and values
- Formatted output like "1. Item — Description" from numbers and items
The separator field accepts any string — including spaces, punctuation, multi-character separators like " — ", or use the tab preset to produce TSV output. If one list has more lines than the other, the shorter list is padded so no data is lost.
All processing happens in your browser. Nothing is uploaded, no account is required.