Test Your Website's Performance
Professional HTTP load testing. See how your site handles real traffic with real-time metrics, percentile breakdowns, and connection timing. 100% free — no credit card required.
Three Test Types, One Powerful Engine
Choose the right load pattern for your testing scenario
Clients Per Test
Distribute N clients over the test duration with controlled ramp-up and ramp-down. Perfect for gradual load profiling and finding breaking points.
Clients Per Second
Launch N new connections every second. Total load grows continuously throughout the test. Ideal for stress testing and capacity planning.
Maintain Client Load
Keep N concurrent clients active for the entire test duration. As clients complete, new ones spawn instantly. Best for sustained load simulation.
Real-Time Performance Analytics
Every metric you need to understand your site's performance
Response Time
Average, P50, P95, and P99 latency percentiles. See exactly how your slowest requests perform under load.
Requests Per Second
Live throughput counter updated every second. Watch your server's capacity in real time as load increases.
Error Rates & Status Codes
Track HTTP status code distribution (2xx, 3xx, 4xx, 5xx) and see exactly when errors start appearing.
Connection Timing
Full breakdown: DNS lookup, TCP connect, TLS handshake, and time-to-first-byte. Pinpoint bottlenecks instantly.
Bandwidth
Bytes sent and received tracked per second. Understand your bandwidth consumption under different load levels.
Active Virtual Users
Live count of concurrent connections. Correlate user count with response times to find your optimal capacity.
Three Steps to Load Test
From signup to results in under 5 minutes
Verify Your Domain
Add a small verification file to your web root to prove ownership. Takes under a minute.
Configure Your Test
Choose your test type, set the number of virtual users, pick a duration, and select your target URL.
Watch Results Live
Real-time charts update every second. See response times, throughput, errors, and connection timing as the test runs.
Powered by CyberLoader
Our load testing engine is a custom-built C binary designed for maximum connection throughput. No shared infrastructure, no noisy neighbors — dedicated servers generate clean, consistent load.
Free for Everyone
No limits, no trials, no credit card. Just load testing.
Setup takes under 5 minutes
Start Load Testing Now
Find out how your site performs before your users do.
Free forever • No credit card • Results in minutes
