Generate random binary, hexadecimal, octal or decimal strings of any length for tests and demos. Random Binary Generator is a free online tool from the ToolsRift Randomizers & Games collection. It runs entirely in your browser — nothing to install, no signup, and your data never leaves your device.
Choose the base (binary, octal, hex or decimal), the length and optional grouping, then press Generate to get a random digit string you can copy.
Test fixtures, teaching binary and hex, generating sample bit patterns, mock identifiers and placeholder data for parsers — anywhere you need digits with no meaning attached.
The digits do come from your browser's secure random generator, but a real key should be produced by your crypto library with the right length and format. Treat these strings as test data rather than production secrets.
It inserts a space every 4 or 8 characters, so a 32-bit binary string reads as four tidy bytes instead of one unbroken run. Grouping is only visual — the copy button can copy either form.