Random String Generator: Create Custom Random Strings Instantly
Generate random strings with configurable length and character sets. Ideal for test data, unique IDs, placeholder text, and development workflows.
February 9, 2026
Generate Random Strings for Any Purpose
Our random string generator creates strings of customizable length using the character sets you choose. Unlike a password generator which focuses on security, a random string generator is a versatile tool designed for a wide range of practical applications including testing, development, and data generation.
How Random Strings Are Generated
The generation process is straightforward. You select a desired length and choose which character types to include. The tool then randomly selects characters from your chosen pool to build a string of the specified length. Each character position is independently randomized, ensuring that the output has no discernible pattern.
Our generator uses the browser's built-in random number functions to ensure high-quality randomness. The entire process runs locally on your device, so no data is sent to external servers.
Available Character Sets
- Uppercase letters (A-Z) — Standard Latin uppercase characters
- Lowercase letters (a-z) — Standard Latin lowercase characters
- Numbers (0-9) — Numeric digits
- Special characters — Symbols like !@#$%^&* for added variety
You can combine these sets freely. For example, selecting only lowercase letters and numbers produces strings like k7m2p9x4, which are commonly used for short identifiers.
Use Cases for Random Strings
Test Data Generation
Software developers frequently need random strings to populate databases, test input fields, and simulate real-world data. Generating realistic-looking random strings helps identify bugs in string handling, validation logic, and display rendering. Our tool makes it easy to produce test strings of any length.
Unique Identifiers
Random strings serve as excellent unique identifiers when you need something shorter or simpler than a full UUID. They can be used for session tokens, file names, temporary access codes, or reference numbers in applications where guaranteed uniqueness is not critical but high probability of uniqueness is sufficient.
Placeholder Text
When designing user interfaces or building prototypes, random strings can serve as placeholder content. While lorem ipsum is traditional for paragraph-level text, random strings work well for simulating usernames, product codes, order numbers, and other short-form data fields.
Development and Debugging
Random strings are invaluable during development. They help test character encoding, measure performance with varying string lengths, verify database column limits, and ensure that applications handle special characters correctly.
Random Strings vs. Random Passwords
While random strings and random passwords may look similar, they serve different purposes:
- Passwords are designed for security. They use cryptographic randomness and should always include a mix of character types to resist brute-force attacks.
- Strings are designed for utility. They may use simpler character sets and are optimized for readability, compatibility, or specific format requirements.
If you need a string for authentication or security purposes, use our dedicated password generator instead. For everything else, the string generator is the right choice.
Configurable Length
Our tool supports string lengths from 4 to 128 characters. Short strings of 6 to 8 characters work well for codes and identifiers, while longer strings of 32 to 64 characters are suitable for tokens and test data. Choose the length that fits your specific needs.
Start generating random strings now with our free, browser-based tool.