Random String Generator

What is Random String Generator?

The Random String Generator is a free in-browser tool for minting many high-entropy strings at once: API keys, access tokens, invite codes, test fixtures, salts, or any opaque identifier. Developers, QA engineers, and ops teams reach for it when they need to seed environments, fill a database with realistic random values, or hand out tokens without piping anything through a server. You choose the character pool with the Uppercase, Lowercase, Digits, and Symbols checkboxes, pick a Length and a Count, and press Generate — every string is drawn with crypto.getRandomValues using rejection sampling so each character is uniformly likely. Unlike a password generator aimed at a single memorable secret, this one is tuned for producing batches of machine-readable tokens, and the Regenerate button bumps an internal seed to give you an entirely new set on demand while your settings stay put.

How to use Random String Generator

1. Tick the character sets to include with the Uppercase, Lowercase, Digits, and Symbols checkboxes — at least one must be on.
2. Set the Length of each string and how many strings to make with Count.
3. Press Generate (or Regenerate) to draw a fresh batch from crypto.getRandomValues.
4. Read the strings in the output box; it updates on its own when you change the length, count, or character sets.
5. Copy a single string with its copy button, or copy the whole batch at once with the copy action above the list.

Examples

Uppercase + Lowercase + Digits, Length 32, Count 1

k7QmZ2pX9vT4nR8bL1cW6yH3dF5sG0aJ

Lowercase + Digits, Length 8, Count 3

a3f9k2dq
7m1xp4ce
b8t6w0nz

Uppercase + Lowercase + Digits + Symbols, Length 24, Count 1

G$7m@Kp2!xZq9#vR4&nLwT^h

Frequently asked questions

Are the strings sent to a server?

No. Every string is generated locally with the Web Crypto API (crypto.getRandomValues), and nothing is uploaded or stored anywhere. The tool works offline and the values never leave your browser, which makes it safe for real secrets and tokens.

How random are the strings?

Each character is drawn from crypto.getRandomValues, the browser's cryptographically secure random source, using rejection sampling so the character pool is sampled without modulo bias. That makes the output suitable for tokens, salts, and secrets rather than just casual placeholders.

Why does pressing Generate give me a brand-new set?

Generate (Regenerate) bumps an internal seed and pulls fresh random bytes, so you get a completely new batch while your length, count, and character-set choices stay exactly as you left them.

How is this different from a password generator?

A password generator is tuned for a single memorable, strong secret. This tool is built for bulk machine-readable output — API keys, access tokens, test data — so it lets you produce many strings at once and copy the whole batch in one click.

Can I use these as API keys or tokens?

Yes. With a long enough length and a broad character set the strings have plenty of entropy for API keys, access tokens, and similar opaque identifiers. For human passwords a dedicated password generator may be more convenient.