Free PC benchmark — full system sweep
idle
OBS overlay Share
Export
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Run full sweep
System profile
reading hardware…
Video decode
checking…
The browser's own prediction of whether each codec plays smoothly and on dedicated hardware (power-efficient) at each resolution. Then optionally play a real clip to measure dropped frames.
CPU
—
Run
1 min
5 min
Custom
∞ Until stop
— MOps/s
Single-thread —
Multi-thread —
Scaling —
Peak —
GPU
—
Run
1 min
5 min
Custom
∞ Until stop
— FPS
Avg FPS —
Min (1% low) —
Frames —
Render scale —
Measure compute
— GFLOPS WebGPU · modern compute path
Download
—
Run
— Mbps
Peak —
Avg —
Data moved —
Latency —
Upload
—
Run
— Mbps
Peak —
Avg —
Data sent —
Endpoint cloudflare
Storage · SSD
sequential read / write
Run
File size
1 GB
5 GB
10 GB
25 GB
50 GB
— MB/s write (peak)
— MB/s read (peak)
Sustained write —
Sustained read —
Test file 1 GB
Backend OPFS
Speed tests use Cloudflare's public endpoints (download) and your own server (upload).
The SSD test writes & reads a real file via the browser's sandboxed filesystem (OPFS), using several parallel streams to approximate a native queue depth. Peak is the best window; sustained is the whole-run average. Larger files give steadier, higher numbers — but 25–50 GB writes that much real data to your drive each run (it's deleted afterward), takes longer, and may hit the browser's storage quota. Read speeds are partly served from the OS cache.
CPU & GPU run as sustained stress tests for the duration you pick (or until you hit Stop). On laptops they will spin up fans, get hot, and drain battery — and on a long run a downward drift in the live trace is your hardware thermally throttling. Stop anytime with the Stop button.