About

When working with raw data, developers and marketers often need to wrap text items in specific characters. For example, turning a list of keywords into hashtags, formatting IDs for SQL `IN` clauses, or wrapping list items in HTML tags.

This Prefix/Suffix tool processes extremely large datasets without server-side latency. It includes intelligent whitespace handling to ensure your added characters attach exactly where intended, preventing formatting errors in code or data files.

Formulas

The tool uses a high-performance string concatenation algorithm:

Step 1. Read Input Stream (S).
Step 2. Define Transformation Function: T(line) = Prefix + Trim(line) + Suffix.
Step 3. Map over S: Output = S.map(T).

By processing in memory buffers, the tool avoids DOM reflows until the final render.

Reference Data

Use Case	Prefix	Suffix	Input -> Output
SQL Query	`'`	`',`	ID123 -> 'ID123',
Markdown List	`- [ ]`	(None)	Task -> - [ ] Task
HTML List	`<li>`	`</li>`	Item -> <li>Item</li>

Frequently Asked Questions

No. We use efficient JavaScript memory mapping (O(n) complexity) that handles tens of thousands of lines in milliseconds.

No, 'Trim Whitespace' only removes spaces/tabs from the very beginning and very end of each line before attaching your prefix/suffix.