Add Prefix/Suffix to Lines Online

If you've ever had to manually add single quotes and commas to a list of 500 emails to format a SQL IN clause, you know exactly why this tool exists. It's designed to automate the mind-numbing process of appending strings to the start or end of multiple lines.

The Problem It Solves

Whether you are wrapping lines in HTML <li> tags, formatting CSV data, or building database queries, doing it line-by-line manually is a waste of your time. This utility takes a bulk block of text and applies your chosen prefix or suffix to every single line in one click.

How It Works Under the Hood

This tool is built to run entirely on the client side. When you paste your text, the browser splits it into an array, maps over every line, and concatenates your prefix and suffix variables. It doesn't send your data to a backend, which is critical if you're formatting sensitive user emails or database queries.

Edge Cases Handled

• Exact Whitespace: If you type a prefix with a trailing space (e.g., - for Markdown lists), the tool respects that exact spacing.
• Empty Line Filtering: You have a toggle to skip empty lines, so you don't end up with random floating tags where there's no data.
• Prefix-Only or Suffix-Only: You aren't forced to use both. Need to just add a comma to the end of everything? Leave the prefix blank.

It's a simple, fast utility that saves hours every month.