What Is Add Prefix/Suffix?
Add Prefix/Suffix is a text tool that adds custom text to the beginning and/or end of every line in your input. Whether you need to prepend bullet points, wrap lines with HTML tags, or append semicolons to each line, this tool handles it instantly.
The output updates in real time as you type. This tool runs entirely in your browser — no text is sent to any server.
How to Use This Tool
Enter Your Text
Type directly into the input editor, paste content with Ctrl+V, or upload/drag a .txt file.
Set Prefix & Suffix
Enter the text to add before each line (prefix) and/or after each line (suffix). Leave either blank to skip it.
See Results Instantly
The transformed output appears in real time in the right panel as you type or change settings.
Copy or Download
Use Copy to copy the result to clipboard, Download to save as a .txt file, or Clear to reset.
Features Explained
Prefix & Suffix Fields
▼
Enter any text in the Prefix field to prepend it to each line, and any text in the Suffix field to append it. Both fields support spaces, special characters, and symbols. Use them independently or together.
Skip Empty Lines
▼
When enabled (default), empty lines are left untouched — no prefix or suffix is added to them. Disable this option if you want every line processed, including blank ones.
Real-Time Processing
▼
The output updates instantly as you type in any field — the input, prefix, or suffix. No need to click a button to see results. The computation is memoized for performance.
File Upload & Drag and Drop
▼
Upload a .txt file using the Upload button or drag and drop a text file directly onto the input area. The file contents replace the current input text.
Who Is This Tool For?
Developers
Wrap lines with HTML tags, add comment markers, prepend indentation, or append semicolons to code lines in bulk.
Data Analysts
Add delimiters, quote marks, or SQL syntax around data values for quick formatting before import or query building.
Writers & Editors
Add bullet points, numbering prefixes, or quote markers to lists and paragraphs for consistent formatting.
System Admins
Prepend timestamps, log levels, or hostnames to log entries. Append tags or metadata to configuration lines.
Marketers
Add hashtags, mentions, or tracking parameters to lists of keywords, URLs, or social media content.
Students
Format notes with consistent prefixes like "Q: " and "A: ", or add numbering to study material lines.
Common Prefix/Suffix Examples
| Prefix | Suffix | Example Output | Use Case |
|---|---|---|---|
| "- " | "" | - First line | Markdown bullet list |
| "<li>" | "</li>" | <li>First line</li> | HTML list items |
| "// " | "" | // First line | Comment out code |
| "'" | "'," | 'First line', | SQL/JS string array |
| " " | "" | First line | Add indentation |
| "" | ";" | First line; | Append semicolons |
Tips for Adding Prefix & Suffix
Wrap lines with HTML tags
Set prefix to an opening tag like "<li>" and suffix to the closing tag "</li>" to wrap every line in HTML elements.
Build SQL IN clauses
Set prefix to "'" and suffix to "'," to quote each line. Remove the trailing comma from the last line and wrap with IN(...).
Comment out code blocks
Set the prefix to "// " (with a space) to comment out every line in JavaScript, C, or similar languages.
Use Skip Empty Lines wisely
Keep it enabled to avoid adding prefixes/suffixes to blank lines, which keeps your output cleaner and more readable.
Combine with other tools
Use Add Prefix/Suffix with Sort Lines, Remove Duplicates, or Add Line Numbers for multi-step text processing workflows.
Add CSV quoting
Set prefix and suffix both to double quotes (") to wrap each line in quotes for CSV formatting.
Privacy & Security
This tool runs 100% in your browser. Your text is never uploaded to any server. It is stored only in your browser's local storage so it persists when you refresh the page.
You can clear it at any time using the “Clear” button. No cookies are used, no analytics track your text content, and no third-party services have access to what you type.