rate limit simulator — free browser tool | fatcousin

visualize token bucket · fixed window · sliding window algorithms with live parameters

algorithm

Tokens refill at a steady rate. Allows bursts up to bucket capacity. Used by AWS, Stripe.

parameters

capacity (max tokens)

refill rate (tokens/sec)

5/s

incoming request rate (req/sec)

8/s

request pattern

visualization

83total requests

59allowed

24rejected

71%pass rate

ready