Word Scrambler

Scramble the middle letters of every word while keeping the first and last letters intact (typoglycemia).

Input

Scrambled

Characters: 0Words: false

Word scrambler — typoglycemia demo

This tool demonstrates "typoglycemia" — the phenomenon where our brains can read text even when the interior letters of words are shuffled, as long as the first and last letters stay in place. The scrambling is deterministic (seed-based), so the same input always produces the same output. For random text shuffling, try Shuffle Lines. To reverse text, use Text Reverser.

Built and maintained by Meet Shah · Last updated 5 August 2026

What this tool is used for

Producing a puzzle where words stay readable but scrambled.
Demonstrating the readability effect where only the outer letters matter.
Creating a game or an exercise for a class.
Generating input where every word keeps its length but not its spelling.
Making a quiz prompt that is hard to read but not impossible to work out.

Frequently Asked Questions

How is a word scrambled?: By a Fisher-Yates shuffle of its letters, which gives every arrangement equal probability. The naive alternative — sorting with a random comparator — is biased and is undefined behaviour in some JavaScript engines.
Can a scramble return the original word?: Yes, and that is correct behaviour rather than a fault — one arrangement out of n! is the original. Short words hit it often: a 3-letter word has a 1-in-6 chance. Implementations usually re-roll rather than pretend it cannot happen.
What is the typoglycemia effect?: The claim that text stays readable if the first and last letters are fixed and the middle is scrambled. The widely circulated 'Cambridge study' does not exist, but the effect is partially real — it degrades sharply with longer words and unfamiliar vocabulary.
How many arrangements does a word have?: n! for n distinct letters, divided by the factorial of each repeated letter's count. 'LISTEN' has 720; 'LETTER' has only 120, because the two Ts and two Es are interchangeable.
Is a scrambled word the same as an anagram?: Not quite. An anagram is a rearrangement that forms another real WORD ('listen' to 'silent'); a scramble is any rearrangement, almost always nonsense. Every anagram is a scramble, but very few scrambles are anagrams.
Are first and last letters usually kept?: In the typoglycemia form, yes — only the interior is shuffled, which is what keeps the text readable. Scrambling every letter produces something no one can read, which is a different tool for a different purpose.
Does the readability claim actually hold?: Only partly. The viral version overstated it: short words are barely affected because they have little interior, and long words with rearranged interiors slow readers measurably. Context does most of the work.

Common errors and gotchas

Expecting three-letter words to change, since only the middle can be scrambled.
Assuming the readability claim is well supported, as it is a popular simplification rather than a finding.
Scrambling text that must remain searchable or accessible.
Losing punctuation attached to words, which lands in odd positions.
Scrambling text in a language where word morphology makes it genuinely unreadable.