Why this tool is useful
Use Custom-Sided Dice Roller when you need results for a configurable die size without sending the source values or generated result to a server.
Generators & Random · runs locally
Custom-Sided Dice Roller
Generate results for a configurable die size locally with bounded controls and cryptographically secure browser randomness.
Ready. Your working data stays in this browser.
How it works
The browser validates this tool's limits and draws one bounded integer for every requested die. Rejection sampling prevents modulo bias.
Practical example
Run Custom-Sided Dice Roller with the sample controls, inspect the locally generated result, then copy or download only what you intend to keep.
Validation
The calculation is deterministic and explains validation errors instead of silently changing invalid input.
Privacy boundary
Input and output remain in this tab. Copy and download happen through browser APIs without a server upload.
Result passport
Every run reports its tool mode, timestamp and input/output size so transformed data can be audited.