About Pseudo-Random Number Generator
A cryptographically-secure pseudo-random number generator (PRNG). This operation uses the browser's built-in crypto.getRandomValues() method if available. If this cannot be found, it falls back to a Fortuna-based PRNG algorithm.
Input: text. Output: text.
Format reference: Pseudo-Random Number Generator background and specification
Example
Use “Try example” to load this public sample and its settings, then run it.
Settings used in this example
| Parameter | Example value | Input and choices |
|---|---|---|
| Number of bytes | 64 | Minimum: 1 |
| Output as | Hex | Hex, Integer, Byte array, Raw |
Input
The input is empty because this example uses the settings to generate its result.
Result
The example demonstrates the configured operation. Generated values, timestamps or formatting may vary between runs.
Parameters
| Parameter | Default value | Input and choices |
|---|---|---|
| Number of bytes | 32 | Minimum: 1 |
| Output as | Hex | Hex, Integer, Byte array, Raw |
Before interpreting the result
Use the exact key encoding, mode, padding and IV expected by the source system. Historical ciphers are useful for learning and analysis. Encoding alone provides no confidentiality.
How to use this page
- Paste your input or open a local file.
- Adjust tool options if needed, then choose Run tool.
- Copy the result or download the original output bytes.
Inputs and results are not added to the public catalogue or saved in the URL. Processing happens in your browser; HTTP Request and DNS over HTTPS send the requests you explicitly run. Files up to 128 MiB can be opened; decompression and image tools may have smaller processing limits. Large results have a shortened preview. Text and HTML downloads use UTF-8; binary downloads preserve output bytes. Pasted text follows browser newline handling; open a file when exact input bytes matter.