Duplicates preserved
Identical lines appear twice in the output.
Fix: Use Remove Duplicate Lines first if you want unique values.
Line Shuffler
Randomise the order of lines in any multi-line text
Input
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Output
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What is Line Shuffler
Last reviewed:
Line Shuffler uses the Fisher–Yates algorithm to reorder the lines of your text uniformly at random. It preserves each line's content exactly — only the order changes.
It's a frequent ingredient in giveaways, test data generation, icebreaker prompts, and any workflow that needs fair randomisation of records.
Why use it
- Pick random winners from a list of entries.
- Produce randomised test fixtures for QA runs.
- Create flashcard decks with unbiased order.
- Generate random seating or pairing lists.
- Prepare random sampling data for research.
Features
- Unbiased Fisher–Yates shuffle
- Preserves line content exactly
- Client-side Line Shuffler workflow, no servers involved
- Works with Unicode lines
- Instant output for large lists
How to use Line Shuffler
- Paste lines. Drop one line per entry into the input.
- Run. The lines are reordered uniformly at random.
- Copy. Grab the shuffled output for your raffle or fixture.
Example (before/after)
Input
alice bob carol dave
Shuffled (example)
carol alice dave bob
Common errors
Empty lines shuffled too
Blank lines are treated as regular lines.
Fix: Run Remove Empty Lines beforehand.
FAQ
Is the shuffle unbiased?
Yes — the tool uses the Fisher–Yates algorithm with Math.random().
Is it cryptographically secure?
No. For raffles or security-sensitive cases, use a CSPRNG.
Will empty lines move?
Yes — they participate in the shuffle like any other line.
Can I re-shuffle?
Yes — run the tool again to get a different order.
Does it preserve Unicode?
Fully — each line is treated as an atomic string.
Related tools
Combine shuffling with dedup and sort utilities to craft precise random datasets. You can also browse the full String Utilities category for more options.
Word Shuffler
Randomly reorder the words in a sentence while preserving spacing
Remove Duplicate Lines
Remove duplicate lines from text
Sort Lines
Sort lines alphabetically or numerically
Remove Empty Lines
Remove empty lines from text
Random Number Generator
Generate random numbers
Random Date Generator
Generate random dates
Line Counter
Count lines in text
Multi-line to Single Line
Flatten multi-line text into a single line with a configurable separator
Single Line to Multi-line
Split a single-line string on any delimiter to produce one value per line
Sort Text Alphabetically
Sort text lines alphabetically
Binary to Text
Convert binary to readable text
Case Converter
Convert text between different cases (camel, snake, kebab, etc.)