String Generator
Generate secure random alphanumeric strings with customizable options
Tip: Perfect for creating passwords, unique IDs, tokens, and test data. Use the secure generation method for sensitive applications.
Advanced Options
Generated String
Batch Generation
Common Applications
Security Applications
- Strong passwords
- API access tokens
- One-time verification codes
- Secure session identifiers
Development Uses
- Unique ID generation
- Test data creation
- Referral/coupon codes
- URL shorteners
Generation Methods Explained
Cryptographically Secure
Uses the browser's Crypto API to generate strings with the highest entropy. Suitable for security-critical applications like passwords and authentication tokens.
Pseudo-Random
Uses JavaScript's Math.random() function. While not suitable for cryptographic purposes, it's sufficient for non-security-critical applications like demo data or casual use.
Custom Pattern
Create strings that follow a specific format or pattern. Useful for generating structured IDs, reference codes, or data that needs to follow specific rules.
Frequently Asked Questions
How secure are the generated strings?
When using the Cryptographically Secure method, the strings are generated using your browser's built-in CSPRNG (Cryptographically Secure Pseudo-Random Number Generator), making them suitable for passwords and security tokens.
What does "exclude ambiguous characters" mean?
This option removes characters that are visually similar and easily confused when reading or typing, such as '0' (zero) and 'O' (capital o), '1' (one), 'l' (lowercase L), and 'I' (capital i).
How do I use the custom pattern feature?
In the custom pattern field, use these placeholders: 'A' for letters, '9' for numbers, '#' for special characters, and '*' for any character. For example, "AA-99-##" would generate something like "XY-42-$%".
What's the maximum length of string I can generate?
The tool can generate strings up to 100 characters in length for a single string, and up to 100 strings in batch mode.
How can I save the generated strings?
You can copy individual strings using the copy button, or copy the entire batch from the batch results area. For larger batches, consider running multiple generations and saving the results to a text file.