Random String Generator

Choose a character set

Use alphanumeric, lowercase, uppercase, numeric, hexadecimal, URL-safe, readable, or custom characters. A familiar character set does not by itself make a string a valid hash, token, URL, password, or key.

Set length and quantity

Generate strings from 1 to 256 characters and 1 to 100 results per batch. Quantity is the number of separate strings; length applies to each one.

Exclude characters

Exclude duplicates to prevent repeated characters within each string; the character pool must be large enough for the requested length. Exclude look-alike characters to make values easier to read. Both options affect the available choices.

Copy, download, and entropy

Copy one result, copy the batch, or download a TXT file. The displayed pool size and entropy are estimates. In particular, the entropy figure is based on pool size and length and does not account for the reduced combinations when duplicates are excluded.

Use random strings appropriately

Generation happens locally in your browser using its cryptographically secure random source. Values are not sent to our server. This does not make every output suitable for a production secret; follow the consuming system’s length, format, and handling requirements.