Clobbr
See your API's real performance at a glance.
Clobbr hits an endpoint in sequence or in parallel and shows what happens to response times under load. It runs on your machine, on macOS, Windows or the CLI. One lifetime licence, no account.
What it is
Load testing without the onboarding call
Clobbr answers one question: how does this endpoint behave when you hit it again and again? Give it a URL, choose how many calls and whether they run in sequence or in parallel, and it shows you what happened to response times.
It shows percentiles, not just an average. An average hides the slow requests. p95 and p99 are where the timeouts live, and Clobbr puts them side by side so the long tail is visible.
Everything runs on your machine. There is no account to create and no results sent anywhere. It comes as a desktop app for macOS and Windows and as a CLI for scripting the same check, on a lifetime licence rather than a subscription.
Why it is built this way
The ideas behind it
- 01
Sequential or parallel
Sequential runs show baseline latency. Parallel runs show what happens under contention. One toggle switches between them.
- 02
Percentiles, not averages
p50, p95 and p99 side by side. The average is where slow requests hide.
- 03
Runs locally
Tests run on your machine against your endpoint. No account, and no data leaves your laptop.
- 04
App and CLI
Explore in the app, then automate the same test from the command line.
Specifics
What you get
- Load test any REST or GraphQL endpoint, in sequence or in parallel
- Read p50, p95 and p99 instead of one misleading average
- Browse result history per endpoint instead of a one-off terminal dump
- Runs locally on macOS and Windows, or headless through the CLI
- No account and nothing uploaded. The tests run on your machine.
- One lifetime licence, not a per-seat subscription
Screens
What it looks like
A closer look at Clobbr.
From clobbr.app
“See your API’s real performance at a glance.”
Clobbr is a fast, local-first API load testing tool for macOS, Windows, and CLI. Lifetime license, no subscription, no account, GraphQL + REST supported.
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