Shuffle Lines randomly reorders all lines in the text using the Fisher-Yates algorithm. Shuffle Characters randomizes the individual characters in each line independently. Useful for generating random quizzes, shuffling datasets, or creating test fixtures. Runs entirely in your browser.
Paste a list (one item per line, or whitespace-separated words), pick line or word mode, and the tool returns the same items in a different random order. Each click of Randomize reseeds — clicking twice gives two genuinely different shuffles, not the same result.
The shuffle is Fisher–Yates, which gives every permutation an equal probability of being chosen. The randomness source is Math.random, suitable for quizzes, picking a winner from a list or randomising test data — but NOT suitable for anything security-sensitive like generating tokens or passwords (use the Password Generator for that).
It uses the Fisher–Yates algorithm, which gives every permutation equal probability — there is no bias toward any particular ordering.
Not in this tool — every run uses a fresh Math.random seed. If you need reproducible shuffles, copy the result the first time.
Math.random is not cryptographically secure. It's fine for casual quizzes and ordering test data, but use crypto.getRandomValues (or our Password Generator) for anything where bias matters.
By default empty lines are dropped before shuffling so you don't get a result peppered with random blank lines. There is a toggle to keep them if you need to.
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