Shuffle Lines
Free online line shuffler. Randomly reorder text lines with one click. Perfect for randomizing quiz questions, lists and data rows. All processing is local and private.
How to Use Shuffle Lines
Paste Your Text
Paste lines of text into the input panel. Each line is treated as a separate entry. The tool works with lists, quiz questions, data rows, and any line-based content.
Shuffle the Lines
Click "Shuffle" to randomly reorder all lines. Each click produces a different random order. The shuffling uses the Fisher-Yates algorithm for fair, unbiased randomization.
Copy the Result
The shuffled text appears in the output panel. Copy it to your clipboard or use it directly. You can shuffle multiple times until you get an order you like.
Example
Before (Original Order)
Sakura
Ren
Haruki
Yuki
SoraAfter (Shuffled)
Haruki
Sora
Sakura
Yuki
RenEach shuffle produces a different random order.
Frequently Asked Questions
How does the shuffle work?
The tool uses the Fisher-Yates (Knuth) shuffle algorithm, which produces an unbiased random permutation — every possible ordering is equally likely. The randomness comes from Math.random(), which is suitable for most non-cryptographic use cases. Each shuffle is independent, so clicking again gives a new random order.
Will lines be duplicated or lost?
No. Shuffling only changes the order of lines, not their content. Every line from the input appears exactly once in the output, just in a different position. No lines are added, removed, or modified.
Is the shuffle truly random?
For practical purposes, yes. The Fisher-Yates algorithm with Math.random() provides a fair shuffle. The results are random enough for all common use cases like test question ordering, playlist shuffling, and data randomization. For cryptographic applications, use a dedicated CSPRNG instead.
When would I need to shuffle lines?
Common uses include: randomizing quiz or test question order, shuffling playlist or task lists, creating random group assignments, randomizing data rows for machine learning train/test splits, picking random samples from a list, and generating random word orders for brainstorming.
Practical Uses for Line Shuffling
Randomization is essential in many fields — from education to data science. A simple line shuffler eliminates bias and ensures fair, unpredictable ordering.
Common Scenarios
- Education: Randomize quiz questions to prevent cheating
- Research: Shuffle participant lists for random group assignment
- Data science: Randomize data rows before train/test splitting
- Events: Shuffle speaker or performer order for fair scheduling
- Brainstorming: Randomize word lists to spark new connections