Is the shuffle truly random?

It uses the Fisher-Yates algorithm, which produces an unbiased uniform permutation, seeded fresh on each click so every shuffle differs.

Can I shuffle individual words instead of lines?

Yes. Switch the mode to Words to reorder every whitespace-separated token, or to Characters to scramble individual letters.

Does my text leave the browser?

No — shuffling happens entirely in your browser. Nothing is uploaded or stored.

Why is Fisher-Yates better than sorting by a random key?

Fisher-Yates guarantees every ordering is equally likely in linear time. Sorting by Math.random keys is subtly biased and slower, so this tool uses the proven unbiased method.

What happens to blank lines or extra spaces in word mode?

In word mode the text is split on whitespace and empty tokens are dropped, so the result is a clean single-spaced list of the words in random order.

Will repeated clicks give the same order?

No. Each click reseeds the random generator, so you get a different arrangement every time — useful for re-rolling until you like the order.

Can I use it to pick a random winner from a list?

Yes. Paste names one per line, shuffle by lines, and the entry now at the top is a fair random pick.

Text Shuffler — Gera Tools

Shuffle lines, words or characters

The text shuffler randomly reorders your input so that every arrangement is equally likely. Use it to randomize a list of names, scramble words for a puzzle, reorder quiz questions, or pick a fair random winner. Choose to shuffle by lines, words, or characters.

How it works

The tool splits your text by the chosen unit — by newline for lines, by whitespace for words (dropping empty tokens), or into individual characters. It then applies the Fisher–Yates shuffle: walking from the last item to the first, it swaps each item with a randomly chosen earlier-or-equal position. This produces a uniform, unbiased permutation in linear time — far more reliable than sorting on random keys. A pseudo-random generator is seeded fresh on every click, so each shuffle gives a new order. The shuffled pieces are then re-joined (lines by newline, words by space, characters with nothing).

Example

Input lines:

apple
banana
cherry
date

One shuffle might give:

cherry
apple
date
banana

Click again and the order changes. Everything runs in your browser — nothing is uploaded or stored.