How to Use the Line Prefix, Suffix & Auto-Numbering Tool
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1
Paste your multi-line list or code snippets.
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2
Enter your desired prefix (e.g. "https://", "TODO: ", or bullet points) and/or suffix (e.g. ",", ";").
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3
Optionally enable "Auto-Numbering" with starting number, zero-padding, and separator style (e.g. "1. ", "001) ").
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4
Click "Process Lines" and copy your formatted output.
Practical Example & Use Case
Common Real-World Scenario
Transforming a list of 200 product IDs into formatted SQL strings by adding "'" as prefix and "'," as suffix in half a second.
Technical Notes & Limitations
Browser Engine Architecture
Includes options to trim leading/trailing whitespace and skip empty lines automatically.
Frequently Asked Questions
Can I add Roman numerals or alphabet numbering?
Yes, decimal numbers (1, 2, 3), letters (A, B, C), and Roman numerals (I, II, III) are supported.
Will empty blank lines be numbered?
By default, empty blank lines are skipped, but you can toggle "Include Blank Lines" if desired.