What Is Random Text Generator?
Random Text Generator creates cryptographically secure random strings from character sets you choose. Unlike Lorem Ipsum (which produces readable Latin), this tool generates truly random characters — ideal for testing, passwords, sample data, and stress-testing text inputs.
It uses your browser's built-in crypto.getRandomValues() API, which provides cryptographically strong random numbers. This tool runs entirely in your browser — no data is sent to any server.
How to Use This Tool
Set Length
Enter a number between 1 and 10,000 to specify how many characters to generate.
Choose Character Sets
Toggle Uppercase (A–Z), Lowercase (a–z), Numbers (0–9), and Spaces on or off using the checkboxes.
Click Generate
Press Generate to create random text. After the first generation, text auto-regenerates when you change any option.
Copy or Download
Use Copy to copy to clipboard, Download to save as a .txt file, or Clear to reset the output.
Features Explained
Cryptographically Secure Randomness
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This tool uses the Web Crypto API (crypto.getRandomValues) instead of Math.random(). This provides high-quality randomness suitable for security-sensitive applications like password generation and token creation.
Four Character Sets
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Mix and match uppercase letters (A–Z), lowercase letters (a–z), digits (0–9), and spaces. If all checkboxes are unchecked, the tool defaults to lowercase letters to ensure output is always produced.
Auto-Regeneration
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After your first click on Generate, any change to the length or character set options automatically regenerates the text. This gives you instant feedback as you adjust settings.
Persistent Settings
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Your length and checkbox preferences are saved to local storage. When you return to this tool, your last-used settings are restored automatically.
Who Is This Tool For?
Developers
Generate test data, seed databases, stress-test input fields, or create random identifiers for development.
Security Professionals
Create strong random passwords, tokens, and nonces using cryptographically secure randomness.
QA Engineers
Test form validation, character limits, edge cases, and internationalization with random input strings.
Designers
Fill UI mockups with random characters to test how layouts handle unpredictable content.
Students
Generate sample data for programming assignments, statistics exercises, or cryptography coursework.
Data Scientists
Create random strings for Monte Carlo simulations, data masking, or anonymization testing.
Quick Reference
| Character Set | Characters | Count |
|---|---|---|
| Uppercase | A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | 26 |
| Lowercase | a b c d e f g h i j k l m n o p q r s t u v w x y z | 26 |
| Numbers | 0 1 2 3 4 5 6 7 8 9 | 10 |
| Spaces | (space character) | 1 |
| All combined | Uppercase + Lowercase + Numbers + Spaces | 63 |
Tips for Random Text Generation
Use all character sets for passwords
Enable Uppercase, Lowercase, Numbers, and disable Spaces for strong password-like strings with maximum entropy.
Disable Spaces for identifiers
Turn off Spaces when generating tokens, IDs, or filenames that cannot contain whitespace.
Test with large lengths
Generate 5,000–10,000 characters to stress-test textarea rendering, scroll performance, and memory usage in your apps.
Auto-regeneration saves clicks
After your first Generate, just change any option and the text updates instantly — no need to click Generate again.
Not a password manager
While this uses crypto-quality randomness, treat generated strings as temporary. Use a dedicated password manager for storing credentials.
Combine with other tools
Generate random text here, then use Word Counter or Character Counter to verify the output length matches your expectations.
Privacy & Security
This tool runs 100% in your browser. All random text is generated locally using the Web Crypto API — nothing is sent to any server. Your settings are saved in local storage for convenience.
Use the “Clear” button to remove generated text at any time. No cookies are used, no analytics track your output, and no third-party services are involved.