Free Online Random String Generator
The random string generator produces a cryptographically secure string of the length and character set you choose — for tokens, API keys, test data, and one-off identifiers.
Your data is processed entirely in your browser and never sent to any server.
How to Use This Developer Tool
- Set the length (1–128).
- Toggle which character classes to include.
- Optionally exclude ambiguous characters.
- Click Generate, then Copy.
What Is a Random String Generator?
When you need a string that won't collide and shouldn't be guessable, you want crypto-grade randomness, not `Math.random`. This generator uses the browser's `crypto.getRandomValues` to draw each character uniformly from the chosen set, which is the same primitive used by password managers and TLS libraries.
Toggle uppercase, lowercase, digits, and symbols independently. Exclude visually ambiguous characters (`0`, `O`, `1`, `l`, `I`) for strings humans will type from a screen. Generate 1 to 50 at a time for seeding test fixtures, populating placeholder API keys, or producing batch IDs.
Frequently Asked Questions
What characters can I use?
How random is it?
What length should I use?
Published by the WeGotEveryTool team. We build and test every tool in-house and update pages when the underlying spec, formula, or recommendation changes.
Reviewed: May 2026. Disclaimer: this tool is provided as-is for general informational use. For decisions with material consequences (medical, legal, financial, security) verify results against a qualified professional source.
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