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LoadTester Logo

LoadTester

Web-based HTTP and API load testing tool with latency monitoring

LoadTester - Product Image

What is LoadTester?

LoadTester is a free web-based HTTP and API load testing service built for developers, QA, and DevOps teams. Run distributed tests from your browser or CI/CD pipeline in seconds with no worker provisioning or infrastructure management.

Key capabilities include instant distributed execution across 8 workers, cold start in 3 seconds, live streaming charts for throughput and latency, and smart auto-stop thresholds for p95 latency and error rate. Integrate with CI/CD via API tokens, webhooks, and Slack/email alerts. Export results as PDF, CSV, or JSON.

Use LoadTester for ecommerce spike testing, API endpoint validation, nightly release gates, and continuous regression detection. A free forever plan is available with upgrade options for higher scale and premium features.

How to use LoadTester

  1. 1

    Create a test by specifying method, URL, mode (VUs/RPS), rate, and duration.

  2. 2

    Launch the test instantly from the dashboard; workers are dispatched automatically.

  3. 3

    Watch live charts updating in real time for throughput, latency, and errors.

  4. 4

    Set auto-stop thresholds for p95 latency and error rate to halt on breaches.

  5. 5

    Export the summary as PDF, CSV, or JSON when the test completes.

Key features

Distributed execution from 8 workers with cold start in 3 seconds, no infrastructure to manage.

Live charts for throughput, latency, active users, and errors during test runs.

Auto-stop thresholds for p95 latency, error rate, and regression vs baseline.

CI/CD integration via API tokens, webhooks, and Slack/email alerts.

Export results as PDF, CSV, or JSON for sharing and analysis.

Use cases

  • Ecommerce load testing: simulate a checkout spike on your API endpoint.
  • CI/CD regression testing: run load tests on every deploy or PR to catch performance regressions.
  • API endpoint validation: test search, auth, or other endpoints under load to ensure p95 targets.
  • Scheduled nightly tests: set up recurring load tests as release gates for production readiness.
  • WebSocket load testing: validate WebSocket endpoints with sustained concurrent users.

Best for

DevelopersQA EngineersDevOps teamsStartupsIndie hackersAPI developers

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Frequently asked questions about LoadTester

Common questions to help you decide if LoadTester is right for you.

Yes, LoadTester has a free forever plan with 10 VUs, 50 RPS, and 1 minute max duration. A Premium plan offers higher limits.

Create a test specifying URL, method, duration, and rate; launch it; watch live results; set thresholds. It dispatches distributed workers instantly.

Yes, LoadTester provides API tokens, webhooks, and integrations with Slack and email for CI/CD pipelines.

Auto-stop thresholds for p95 latency, error rate, and regression vs baseline, with notifications via Slack or email.

Developers, QA engineers, DevOps teams, and startups who need simple, free load testing without managing infrastructure.

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