Random String Generator
Generate secure random strings with custom length and character types. Perfect for passwords, tokens, and unique IDs.
String Configuration
Character Types
Generated Strings
Why use our Random String Generator?
Custom Character Sets
Toggle uppercase, lowercase, numbers, and special characters independently.
Batch Generation
Create multiple random strings in one click for tokens, IDs, and test data.
Cryptographically Secure
Uses secure random generation — not predictable Math.random() output.
What is a Random String Generator?
A random string generator creates unpredictable sequences of characters for API tokens, session IDs, test fixtures, and unique identifiers. Developers use random string generators daily for authentication tokens, database keys, and placeholder data in applications.
Our free online random string generator lets you set string length, quantity, and character types. Generate secure random strings instantly in your browser — copy or download for use in your projects.
Generation Options
- String length:Set character count from short tokens to long keys.
- Batch quantity:Generate 1 to many strings in a single click.
- Uppercase letters:Include A–Z in the character pool.
- Lowercase letters:Include a–z in the character pool.
- Numbers & symbols:Toggle digits and special characters for complexity.
- Copy & download:Export generated strings to clipboard or a .txt file.
Common Use Cases
API Tokens
Generate random bearer tokens and API keys for development.
Session IDs
Create unique session identifiers for web applications.
Test Fixtures
Produce random strings for unit tests and integration tests.
Database Seeds
Generate placeholder values for database seeding scripts.
Coupon Codes
Create random alphanumeric codes for promotions and vouchers.
Filename Suffixes
Add random suffixes to avoid filename collisions in uploads.
How to Generate Random Strings
Set Length & Quantity
Choose string length and how many strings to generate.
Select Character Types
Toggle uppercase, lowercase, numbers, and special characters.
Click Generate
Create secure random strings instantly.
Copy or Download
Copy strings to your clipboard or download as a text file.
Benefits of Random Strings
Secure by Default
Cryptographically secure generation for tokens and secrets.
Flexible Length
From 8-character codes to 128-character keys.
Custom Charset
Match your application's allowed character requirements.
Batch Output
Generate multiple strings for bulk test data creation.
Private Generation
Strings are created locally — never sent to a server.
Completely Free
Generate unlimited strings with no account required.
Random String Tips
- •32+ chars for tokens: Use at least 32 characters for API tokens and session IDs.
- •Alphanumeric for codes: Disable special chars when generating user-facing coupon codes.
- •One string per use: Never reuse random strings as tokens or secrets.
- •Store securely: Save generated tokens in environment variables or secret managers.
- •Test charset first: Verify your app accepts the character types you enable.
- •Pair with hash generator: Hash generated strings for additional security layers.
Generate Random Strings Now
Whether you need API tokens, test fixtures, or coupon codes, our free random string generator creates secure character sequences instantly in your browser.
Scroll up, set your length and character types, and generate. No registration required, completely free, and your strings stay 100% private on Quick Note.
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Frequently Asked Questions
How do I generate a random string?
Set the length, select character types, and click Generate. Random strings appear instantly in the output area.
Can I include special characters?
Yes. Toggle special characters to add symbols like !@#$%^&* to the character pool.
Are the strings cryptographically secure?
Yes. The generator uses cryptographically secure random values, not predictable Math.random() output.
Can I generate multiple strings at once?
Yes. Set the quantity field to generate multiple random strings in a single batch.
What is the maximum string length?
There is no hard limit, but very long strings with large quantities may slow the browser. Typical token lengths of 16–64 characters work instantly.
Is my data uploaded to a server?
No. All generation happens entirely in your browser.
Can I download the strings?
Yes. Click Download to save the list as a plain .txt file.
Is the random string generator free?
Yes. It is completely free to use with no registration, downloads, or hidden fees.