Random String Generator

Generate a random string of letters, digits, and symbols directly in your browser.

Обработка выполняется локально в браузере. Данные не отправляются на сервер.

For this tool, processing runs locally in your browser and data is not sent to the server.

Случайная строка is a free online tool. Сгенерируйте случайную строку из букв, цифр и символов прямо в браузере. Обработка выполняется локально в браузере. Данные не отправляются на сервер.

What it does

Output

Processing

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GRandom Number Generator

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Data passed between tools is kept only in the current browser session.

How to use

Choose the random string length.
Select which characters to use: letters, digits, symbols, or a custom set.
If needed, pick a preset: token, nonce, URL-safe, hex, or readable string.
Click Generate.
Copy a string, a list, JSON, or an .env value.

More about this tool

The Random String Generator creates random strings of a chosen length directly in your browser. It is useful for dev tasks, nonce values, temporary tokens, mock data, test identifiers, URL-safe strings, hex values, and local development. You can set length, number of strings, character sets, exclude similar symbols, use presets, and copy output in several formats. Generation runs locally in your browser, and your data is not sent to the UtiLab server. For production secrets, API keys, JWT secrets, and critical keys, prefer backend generation and secure storage.

Runs in the browser
Data is not sent to the server
Generates strings of a chosen length
Letters, digits, and symbols
URL-safe, hex, and token presets
Can generate multiple strings
Shows approximate entropy
No registration required

Frequently Asked Questions

How do I generate a random string?

Choose the length and character set, then click Generate. Copy the result with one click.

Can I choose the string length?

Yes. You can set any length in the allowed range, for example 8, 16, 32, 64, or 128 characters.

Can I use only letters or only digits?

Yes. You can enable or disable lowercase, uppercase, digits, and symbols in settings.

What is a URL-safe string?

A URL-safe string uses characters that are easy to place in URLs: letters, digits, hyphen, and underscore.

Can I exclude similar characters?

Yes. You can exclude characters such as 0, O, o, I, l, and 1 to make manual entry easier.

Is my data sent to the server?

No. Generation runs locally in your browser and is not sent to the UtiLab server.

Can I use the string as an API key?

For dev, tests, and temporary keys, yes. For production API keys and critical secrets, use backend crypto and a secret manager.

Does it use crypto random?

If the browser supports window.crypto.getRandomValues, the tool uses crypto random. Otherwise it may fall back to Math.random with a warning.

Can I generate several strings at once?

Yes. Set the number of strings and copy them as a column, comma-separated list, or JSON array.

Do I need to register?

No. The tool works immediately without registration.

More about this tool

Runs in the browser
Data is not sent to the server
Generates strings of a chosen length
Letters, digits, and symbols
URL-safe, hex, and token presets
Can generate multiple strings
Shows approximate entropy
No registration required

Frequently Asked Questions

How do I generate a random string?

Choose the length and character set, then click Generate. Copy the result with one click.

Can I choose the string length?

Yes. You can set any length in the allowed range, for example 8, 16, 32, 64, or 128 characters.

Can I use only letters or only digits?

Yes. You can enable or disable lowercase, uppercase, digits, and symbols in settings.

What is a URL-safe string?

A URL-safe string uses characters that are easy to place in URLs: letters, digits, hyphen, and underscore.

Can I exclude similar characters?

Yes. You can exclude characters such as 0, O, o, I, l, and 1 to make manual entry easier.

Is my data sent to the server?

No. Generation runs locally in your browser and is not sent to the UtiLab server.

Can I use the string as an API key?

For dev, tests, and temporary keys, yes. For production API keys and critical secrets, use backend crypto and a secret manager.

Does it use crypto random?

If the browser supports window.crypto.getRandomValues, the tool uses crypto random. Otherwise it may fall back to Math.random with a warning.

Can I generate several strings at once?

Yes. Set the number of strings and copy them as a column, comma-separated list, or JSON array.

Do I need to register?

No. The tool works immediately without registration.