Free Random String Generator Online

Choose your length (up to 128 characters), pick which character sets to include (uppercase, lowercase, digits, symbols), and optionally exclude visually similar characters. Generate multiple strings at once and copy any of them individually.

How to Use the Random String Generator

1. Set the desired length using the slider or input field, up to 128 characters.
2. Toggle which character sets to include - uppercase, lowercase, digits, and symbols - depending on what the target system accepts.
3. Optionally exclude visually similar characters (like 0/O or l/1) if the string will ever be typed or read by a person rather than pasted.
4. Choose how many strings to generate at once if you need a batch rather than a single value.
5. Copy an individual string with one click, or copy the full batch to your clipboard.

Developers use this tool to generate placeholder API keys and session tokens while scaffolding an application, before real credentials are issued by a provider. QA engineers use it to produce randomized test data - usernames, passwords, reference IDs - that won't collide with real records. Because generation happens entirely with your browser's cryptographically secure random number generator, nothing you create is ever transmitted to a server, which matters when the output might resemble a real secret.

• Includes unlimited use with a RankWise Tools membership