Randomize Letters in Text
Shuffle the letters within each word to test readability.
Scramble Settings
Statistics
Scramble Modes
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Scramble Letters, Keep Meaning
The Randomize Letters Tool shuffles letters within each word to demonstrate an amazing cognitive phenomenon: as long as the first and last letters stay in place, humans can still read scrambled text! Perfect for readability research, creating word puzzles, and educational demonstrations.
How to Use
- Toggle preserve - ON for readable scrambles, OFF for challenging puzzles
- Enter text - Paste or upload your content
- See statistics - Total words, scrambled words, letters
- Download - Save scrambled text as TXT
Common Use Cases
Cognitive Research
Study how the brain processes scrambled text and demonstrate reading phenomena.
Word Puzzles
Create word scramble games, brain teasers, and educational exercises.
Readability Testing
Test reading comprehension under challenging visual conditions.
Amazing Example
See? You can read it! This works because your brain recognizes word shapes and context, not individual letter order.
Frequently Asked Questions
Why can I still read scrambled text?
Research shows that as long as the first and last letters of words remain in place, the human brain can decode the word based on context and word shape. This demonstrates that we don't read letter-by-letter, but process words as whole units.
What does 'Preserve First/Last Char' do?
When enabled, this keeps the first and last letter of each word in their original positions and only scrambles the middle letters. This maintains readability while demonstrating the cognitive phenomenon. When disabled, all letters are completely scrambled, making text much harder to read.
Is this truly random?
Yes! The tool uses the Fisher-Yates shuffle algorithm, a proven method for generating truly random permutations. Each time you scramble text, you'll get a different randomization, even for the same input.
Are short words scrambled?
No. Words with 2 or fewer letters (like 'I', 'am', 'to', 'at') are left unchanged because scrambling them would either have no effect or make them unrecognizable. Only words with 3+ letters are scrambled.
Can I use this for word puzzles?
Absolutely! This tool is perfect for creating word scramble puzzles, brain teasers, educational exercises, or cognitive games. With preserve mode OFF, you get challenging scrambles. With it ON, you get more solvable puzzles.
How does this help with cognitive research?
This tool demonstrates key findings in cognitive psychology about how we process written language. It's useful for educational demonstrations, psychology experiments, linguistics research, and studying reading comprehension strategies.
Can I upload files to scramble?
Yes! Click the Upload button to load .txt files. Perfect for batch scrambling documents, creating practice materials for reading comprehension tests, or generating word puzzle content at scale.
Does punctuation get scrambled?
No. Punctuation marks, spaces, and formatting are preserved exactly as they appear in the original text. Only the letters within words are shuffled. This maintains sentence structure and readability.
Can I download the scrambled text?
Yes! Click the TXT button to download your scrambled text as a plain text file. The filename includes a timestamp for easy organization of multiple puzzle versions.
Is my text data private?
100% yes. All processing happens locally in your browser using JavaScript. Your text never leaves your device, and nothing is sent to our servers. Completely private and secure.