Add Suffix to Text Lines

Instantly append custom text, symbols, or formatting to the end of every line. Supports bulk processing and file export.

Configuration

Input Text
0 / 0 Lines

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Prefix lines with numbers.

What is the Suffix Tool?

The Add Suffix to Text Lines tool creates a fast, automated way to insert text, symbols, or characters at the very end of every line in your document. Whether you are adding commas for CSV conversion, semicolons for programming, or email domains, this tool automates the process instantly.

Why You Need It

Coding & Data

Append semicolons ; to code lines or commas , to convert a list into a JSON or CSV array.

Email Lists

Transform a list of usernames into emails by appending "@gmail.com" or "@company.com" to every line.

File Extensions

Mass rename logic: Add ".jpg" or ".txt" to a list of filenames instantly.

See it in action

Before
Apple Orange Banana
After (Suffix: ",")
Apple, Orange, Banana,

Professional Features

Smart Formatting

Automatically wrap your suffix in brackets [ ] or quotes " " with a single click.

Bulk Processing

Process lists of 50,000+ lines instantly. Perfect for large datasets, logs, or CSV files.

Empty Line Filter

Enable "Ignore Empty Lines" to automatically skip blank rows, keeping your document structure clean.

File Support

Directly upload .txt, .csv, or .md files to process content without copy-pasting limits.

100% Private

All processing happens in your browser. No data is sent to our servers, ensuring total privacy.

Instant Export

One-click Copy to clipboard or Download your suffixed result as a new text file.

How to use this tool

1

Input Text

Paste your list or upload a file containing the lines you want to modify.

2

Set Suffix

Type the character, symbol, or word you want to appear at the end of every line.

3

Configure

Choose a wrapping style (Brackets/Quotes) and toggle empty line filtering.

4

Export

Copy the result to your clipboard or download the modified file.

Frequently Asked Questions

What does "Add Suffix" mean?
Adding a suffix means inserting a specific string of text, character, or symbol at the very **end** of every selected line in your document.
Can I add a suffix only to non-empty lines?
Yes! Enable the **Ignore Empty Lines** option, and the tool will automatically skip any blank lines, ensuring your formatting stays clean and professional.
How do I wrap the suffix in brackets?
Use the **Wrapping Style** buttons. Selecting "Brackets" will add `[YourText]` to the end. Note: technically this appends the wrapped text to the end of the line.
Can I upload a file?
Yes, you can upload `.txt`, `.md`, `.csv`, or `.json` files directly. The tool will load the content so you can start appending suffixes immediately.
Is there a limit to the number of lines?
Practically, no. Since the tool runs in your browser, it can handle tens of thousands of lines (e.g., 50,000+) instantly without any server lag.
Can I download the result?
Yes! After processing, click the **Download** button to save your formatted text as a new `.txt` file to your device.
Is my data private?
Yes. All processing happens **locally in your browser**. Your text lists are never sent to our servers, making it safe for sensitive data.
Can I use this for CSV files?
Absolutely. It is perfect for adding commas `,` to the end of every line to quickly convert a list into CSV format.
Does it work on mobile?
Yes, the tool is fully responsive and works perfectly on smartphones and tablets for quick edits on the go.
Is this tool free?
Yes, **Add Suffix to Lines** is 100% free to use with no hidden costs, signup requirements, or usage limits.

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