D&D Dice Roller with DM Controls
Spinly has a free online D&D dice roller for d20 checks, advantage, disadvantage, damage formulas, percentile rolls, and optional DM controls. For searches like rigged D&D dice roller or controlled dice roller, this page explains the harmless demo and agreed-table uses clearly.
What the roller can handle
The main dice roller supports common tabletop rolls such as d20 checks, advantage and disadvantage, d100, damage formulas like 3d6+2, and quick dice buttons. Results stay easy to read on desktop and mobile.
DM controls are meant to support table flow, not replace the group agreement about how rolls should work.
Table etiquette
If your table expects open rolls, keep rolls open. If your table uses hidden DM rolls, make that expectation clear before the session. Changing meaningful outcomes without table agreement can damage trust, especially in campaigns where players care about risk and consequences.
For encounter testing, demos, and private prep, DM controls are practical because nobody is treating the result as a public fair roll.
DM controls and rigged dice demo modes are for agreed table play, prep, testing, demos, and entertainment. Do not present controlled dice outcomes as open fair rolls when players are relying on them.
Related pages
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FAQ
Quick answers before you use the tool.
Does Spinly roll a d20?
Yes. The dice roller supports d20 rolls, advantage, disadvantage, and common D&D dice.
Can I roll damage formulas?
Yes. You can roll formulas such as 2d8+4 or 3d6+2.
What are DM controls for?
They are for prep, testing, demos, private DM rolls, and table situations where controlled or hidden rolling has been agreed.
Should I hide controlled rolls from players?
Only if that matches your table agreement. Do not present controlled outcomes as fair open rolls if players expect normal rolling.