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🧪 Simulate
LV2 · Toolooo Standard
Explore → See → Understand → ActUnderstand it. Feature Level describes the depth of the tool experience.

Rate Limit Playground

Send a simulated stream of requests through fixed-window, sliding-window, and token-bucket limiters and watch what gets throttled.

EngineeringBackendAPIReliability
15/s
10/s
AllowedThrottledRate limit
Total allowed
143
Total throttled
174
Throttle rate
55%
What happened
A burst right at the boundary between two windows can slip through as nearly 2× the limit — 174 of 317 requests were throttled this run.
Why
Fixed window only counts requests within its own clock-aligned second; it resets to zero at each tick with no memory of what just happened a moment earlier.
Try
Turn off bursty traffic and the throttling drops to near zero — fixed window only struggles at window edges, not with steady load.

Understand Rate Limit Playground

What this tool helps you understand

Pick a rate-limiting algorithm and traffic shape, then watch each request pass or get throttled in real time — so the difference between fixed window, sliding window, and token bucket stops being theoretical.

When to use it

Use Rate Limit Playground when engineering, backend, and api work raises questions about rate limiting, token bucket, and sliding window and you need a concrete view before making the next move.

How to read the result

Compare the shape and direction of different scenarios. The useful signal is how the result changes when an input changes, rather than one isolated number.

Assumptions and limits

This is a simplified explanatory model, not a load test or production forecast. Real systems can include dependencies, distributions, failures, and feedback loops outside the selected inputs.

Toolooo is part of Khizooology, created byKhizar Imtiaz (khizooo).