Loot table calculator
Set rarity weights and export chances as CSV or JSON.
These tools run in your browser. Uploaded images stay on this device; no account is needed.
Download formats: CSV · JSON
Start with a preset
Preview
Set the controls, then generate a preview.
How to use it
Enter weights for common, uncommon, rare, and legendary rewards. The table converts them to percentages totaling 100%; it does not choose or create items.
- Set the four rarity weights.
- Read the normalized chance for each tier.
- Download CSV or JSON and test many drops in your game.
Use the CSV or JSON chances in your drop logic and map each rarity to real items. Test the resulting distribution.
Questions
- Do the weights have to add up to 100?
- No. The calculator normalizes positive weights into percentages.
- Does this make drops fair?
- It shows probabilities, but player experience depends on the rewards and number of attempts. Test both in your game.