Add Prefix to List - Online Tool

Instantly add custom prefixes to every line of your text list. This tool runs completely in your browser and never sends your data anywhere.

About This Tool

The Add List Prefix tool helps you quickly modify lists of text by attaching any prefix or suffix to every line. It works instantly and entirely on your device without requiring any downloads or account creation.

Whether you are formatting data, preparing programming input, or organizing content, this utility saves time and removes repetitive manual editing.

Key Benefits of Using This Tool

• Completely free to use with no restrictions
• Runs 100% in your browser with zero data collection
• Works offline after the page is loaded
• Instant processing even for very large lists
• No installation or registration required
• Mobile friendly and responsive interface

Features of This Tool

• Add custom prefix text to each line
• Add optional suffix text
• Automatically number list items
• Ignore or preserve empty lines
• Trim extra spaces from input
• One-click copy of final output
• Works with any language or character set

Common Use Cases

• Preparing CSV or spreadsheet data
• Formatting programming or configuration files
• Adding bullet symbols or markers to plain text
• Generating SQL or code snippets from lists
• Creating organized notes or to-do lists
• Formatting email or marketing content

Fun Fact

Small text utilities like this are among the most frequently used productivity tools on the internet. A simple prefix or suffix can transform raw data into structured information in seconds.

Historical Context

Before modern web applications, adding prefixes to lines required complex text editors or command-line tools such as sed and awk. This online tool brings the same power to everyone with a simple, friendly interface that works on any device.

By moving the processing directly into the browser, users now get the convenience of professional text manipulation without installing software or learning technical commands.