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Internet Speed Test

Measure download, upload, idle and loaded latency, and jitter. Choose a data-usage mode and export a completed report with clear network-test limits.

Look beyond a single download-speed number. This test measures payload throughput and responsiveness on the route from your browser to Cloudflare. Compare runs under similar Wi-Fi, VPN and background-traffic conditions instead of treating one result as a promise for every website.

  • 100% free
  • No registration
  • Live network test
  • Modern browser
  1. 1Enter details
  2. 2Adjust options
  3. 3View result

How fast is your internet?

0
Mbps

Ready when you are

Download · Cloudflare network

Show more info
Upload—Mbps
Latency—ms
Jitter—ms

Measured download: — Mbps

Latency during download — msLatency during upload — ms

Tests use four concurrent transfers after warm-up. Standard mode averages the final 10 seconds. Results measure the route to Cloudflare; Fast.com measures Netflix servers, so readings can differ. Run comparisons one at a time on the same connection.

Uses test data with Cloudflare. Up to 300 MB, plus network overhead.

Starting the speed test sends measurement traffic to Cloudflare, which receives your IP address and request metadata. Automatic submission of final results is disabled.

About Internet Speed Test

Look beyond a single download-speed number. This test measures payload throughput and responsiveness on the route from your browser to Cloudflare. Compare runs under similar Wi-Fi, VPN and background-traffic conditions instead of treating one result as a promise for every website.

Sustained throughput

Multiple concurrent streams measure payload transfer rates after a warm-up.

Latency under load

Compare responsiveness while the connection is idle and while transfers are active.

Explicit test traffic

Starting sends measurement traffic to Cloudflare. The endpoint receives your IP address and request metadata.

How to use Internet Speed Test

  1. 1

    Choose a data mode

    Quick uses up to about 50 MB of payload and Standard about 300 MB; either can finish early. Consider any mobile-data allowance.

  2. 2

    Start the test

    Keep the tab open while measurement traffic runs. Stop if you need to end the test; interrupted runs are not final reports.

  3. 3

    Compare and export

    Review download, upload, idle/loaded latency and jitter. Copy or download the completed report and note your network conditions.

Formats and practical limits

Input: your chosen test mode and live network traffic. Output: a completed measurement report with copy/download controls.

  • The test consumes data and contacts an external measurement endpoint.
  • This is a diagnostic sample, not a contractual provider assessment or a prediction for every remote server.

Practical example

Compare a Wi-Fi test with an Ethernet test while keeping the device, VPN state and background downloads the same. Record those conditions alongside the results.

Frequently Asked Questions

3 answers
Does this test my provider's advertised speed exactly?

No. It measures this device's route to the endpoint at that moment. Wi-Fi, VPNs, device load and other traffic can affect it.

Why does loaded latency matter?

A connection may transfer files quickly but respond slowly while busy. Comparing idle and loaded latency helps reveal that difference.

Does stopping give me a final speed report?

No. Incomplete readings are labelled separately and are not exported as a completed report.

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