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Duplicate Lines
Duplicate lines in text N times
By Craftisle Team
About Duplicate Lines — Free Online Tool
Duplicate lines in text N times. Supports two modes: concatenate (Original + Copy + Copy) or interleave (Original, Copy, Original, Copy). Option to reverse copies. Useful for creating repeated content, test data, and text patterns.
How to Use Duplicate Lines — Step by Step
- Paste your text
Type or paste text with multiple lines.
- Set number of copies
Enter how many times to duplicate (2 = original + 1 copy).
- Choose mode
Select 'Concatenate' to append copies, or 'Interleave' to alternate.
- Duplicate
Click Duplicate. The duplicated text appears in output.
Use Cases for Duplicate Lines
Test data generation
Create repeated test data for software testing.
Content creation
Create repeated patterns for text art or formatting.
Data expansion
Expand small datasets by duplicating entries.
FAQ — Duplicate Lines Free Online Tool
What is 'Concatenate' mode?
Concatenate mode puts all copies together: Original + Copy + Copy + ...
What is 'Interleave' mode?
Interleave mode alternates: Original, Copy, Original, Copy, ...
Can I reverse the copies?
Yes. Enable 'Reverse copies' to reverse the order of duplicated lines.