WebPageTest - Website Performance and Optimization Test

Connection

BW Down	BW Up	Latency	Packet Loss
Kbps	Kbps	ms	%

Desktop Browser Dimensions
Number of Tests to Run
Up to 2
Repeat View First View and Repeat View First View Only
Capture Video
Keep Test Private
Label

Stop Test at Document Complete
Typically, tests run until all activity stops.
Ignore SSL Certificate Errors
e.g. Name mismatch, Self-signed certificates, etc.
Capture network packet trace (tcpdump)
Save response bodies
For text resources (HTML, CSS, etc.)
Preserve original User Agent string
Do not add PTST to the browser UA string
User Agent String
(Custom UA String)
Append to UA String
Disable AVIF image support
Firefox and Chromium-based browsers only
Disable WEBP image support
Firefox and Chromium-based browsers only
Disable JPEG XL image support
Firefox and Chromium-based browsers only
Capture Full Size Video
Enables full size screenshots in the filmstrip
Minimum test duration
Capture data for at least... seconds
Custom headers
Add custom headers to all network requests emitted from the browser
Inject Script
JavaScript to run after the document has started loading

Chrome-specific advanced settings:

Capture Lighthouse Report (Uses a "3G Fast" connection independent of test settings)
Emulate Mobile Browser
Capture Dev Tools Timeline
Enable v8 Sampling Profiler (much larger traces)
Capture V8 Runtime Call Stats
Capture Chrome Trace (about://tracing)
Trace Categories
(when tracing is enabled)
Capture Network Log
Enable Data Reduction
Chrome 34+ on Android
Use Chrome dev tools traffic-shaping (not recommended)
Host Resolver Rules
i.e. MAP * 1.2.3.4
Command-line
Custom options

HTTP Basic Authentication
Username
Password

PLEASE USE A TEST ACCOUNT! as your credentials may be available to anyone viewing the results.

Using this feature will make this test Private. Thus, it will *not* appear in Test History.

Enter Script

Script includes sensitive data
The script will be discarded and the HTTP headers will not be available in the results
Discard all HTTP headers

Check out the documentation for more information on this feature

Block Requests Containing (URL substrings)...
Space-separated list

Block Domains (full host names)...
Space-separated list of domains

Simulate failure of specified domains. This is done by re-routing all requests for the domains to blackhole.webpagetest.org which will silently drop all requests.

Hosts to fail (one host per line)...

Custom Metrics:

See the documentation for details on how to specify custom metrics to be captured.

List of URLs to test (one URL per line)...

or
upload list of URLs (one per line):

Select Test Location

Is the proxy or the server slowing your site down?

Test Optimize Repeat!

Select Test Location

Is the proxy or the server slowing your site down?