Are the generated strings truly random?

The strings are pseudo-random—generated using algorithms, not truly random. For most purposes (testing, IDs, tokens), pseudo-random strings are sufficient. For cryptographically secure random strings (passwords, security tokens), use the password generator tool or specialized security tools.

What's the difference between this and the password generator?

The password generator is designed for secure password generation with strength indicators and security features. The random string generator is for general-purpose random strings (IDs, tokens, test data). For passwords, use the password generator. For general random strings, use this tool.

Can I generate strings with only letters or only numbers?

Yes! Enable only the character types you want. For letters only, enable uppercase and/or lowercase. For numbers only, enable numbers. For alphanumeric, enable letters and numbers. Customize character types to match your needs.

How long should random strings be?

String length depends on your use case. For IDs or tokens, 16-32 characters is common. For test data, any length works. For security purposes, use longer strings (32+ characters). Very short strings (under 8 characters) have higher collision probability. Choose length based on your needs.

Can I generate the same random strings again?

No, random string generators produce different strings each time. If you need reproducible sequences, use programming libraries with seed values. This tool generates new random strings each time you click 'Generate'.

Random String Generator - Generate Strings Free

When to Use This Tool

Use this when:

You need random strings for passwords, IDs, tokens, or identifiers
You're testing applications and need random test data or sample strings
You want to generate unique identifiers or codes for systems or databases
You're creating API keys, session tokens, or authentication tokens
You need random strings for data generation, simulations, or testing
You want to create random codes for promotions, coupons, or access codes
You're developing applications and need random string generation

Don't use this if:

You need cryptographically secure random strings for security purposes (use password generator with security features)
You require random strings with specific patterns or formats not supported
You want to generate random strings offline without browser access (use command-line tools)
You need random strings based on specific seeds or reproducible sequences
You require very large quantities of random strings (over 100 at once)

What is a Random String Generator?

A random string generator creates random alphanumeric strings, hex strings, or custom-character strings of configurable length. Our generator uses the browser's Web Crypto API for cryptographic randomness — nothing is transmitted to any server.

Random string generation is a common need in software development and system administration: creating API keys and access tokens, generating unique filenames and session IDs, creating test data with random identifiers, generating temporary passwords, and producing random codes for verification and activation.

This tool is valuable for developers generating API keys and secret tokens, system administrators creating random configuration values, testers generating unique test data identifiers, project managers creating random meeting/access codes, and anyone who needs random strings for technical or organizational purposes.

Compared to using programming language random functions (which often require writing multi-line scripts), online generators that may log generated strings (potential security concern for keys/tokens), or manually creating 'random' strings (which are never truly random), PureXio generates cryptographically random strings instantly.

The tool supports configurable length (1–256+ characters), multiple character sets (alphanumeric, hex, letters only, numbers only, custom characters), bulk generation of multiple strings at once, separator configuration for readability, and one-click copy. All randomness comes from the Web Crypto API, making generated strings suitable for security-sensitive applications.

Best for: generating random strings for API keys, tokens, IDs. Configurable length and character sets. Cryptographic randomness via Web Crypto API. Fully private.

How to Generate Random Strings

Set string length (1-1000 characters). Enable/disable character types: uppercase letters, lowercase letters, numbers, and symbols. At least one character type must be selected

Set count of strings to generate (1-100). Click 'Generate Random Strings' to create strings. Strings appear instantly in the results area

Review generated strings. Copy individual strings or copy all strings at once. Regenerate to create new strings with same settings

Common Use Cases

Generate API keys: Create random strings for API authentication keys or tokens

Create test data: Generate random strings for application testing or database seeding

Generate identifiers: Create unique IDs, codes, or identifiers for systems

Create access codes: Generate random codes for promotions, coupons, or access passes

Session tokens: Generate random strings for session management or authentication

Password generation: Create random strings for passwords (though password generator is more secure)

Data generation: Generate random strings for simulations, testing, or data generation

Features

Generate random strings with customizable length (1-1000 characters)

Customize character types: uppercase letters, lowercase letters, numbers, and symbols

Generate multiple random strings at once (up to 100 strings)

Uniform distribution—each character has equal probability

Real-time generation—strings appear instantly

One-click copy for individual strings or all strings

100% private—all generation happens locally in your browser

Limitations & Constraints

Maximum 100 strings can be generated at once—for more, generate in multiple batches

Uses browser's Math.random()—not cryptographically secure (suitable for general use, not security)

Random strings are pseudo-random—generated algorithmically, not truly random

String length limited to 1-1000 characters—very long strings may be impractical

Character set is fixed—cannot customize with specific character sets or patterns

Troubleshooting

String generation fails or shows error

Solution: Ensure at least one character type is selected (uppercase, lowercase, numbers, or symbols). String length must be between 1 and 1000 characters. Count must be between 1 and 100. Check that all fields contain valid numbers. Prevention: Select at least one character type and use valid length (1-1000) and count (1-100).

Generated strings seem to repeat or not random

Solution: Random string generators use algorithms that may produce patterns over time. For truly random strings, use cryptographically secure generators. For most purposes (testing, IDs), pseudo-random strings are sufficient. If you see obvious patterns, try generating more strings or using different character sets. Prevention: Understand that pseudo-random strings may show patterns.

Need more than 100 strings

Solution: Generate strings in batches—generate 100, copy them, then generate another batch. The limit of 100 is to prevent browser performance issues. For very large quantities, generate multiple batches or use command-line tools. Prevention: Generate strings in batches if you need many at once.

Need cryptographically secure random strings

Solution: This tool uses Math.random() which is not cryptographically secure. For security purposes (passwords, API keys), use the password generator tool or specialized cryptographic random string generators. This tool is suitable for general randomness, testing, and IDs, not security. Prevention: Use cryptographic tools for security-critical random strings.

Want to generate strings with specific patterns

Solution: This tool generates completely random strings—it doesn't support specific patterns or formats. For strings with patterns (e.g., XXX-XXX-XXX format), use programming scripts or specialized pattern generators. The tool is designed for random string generation, not pattern-based generation. Prevention: Use programming tools for pattern-based string generation.