WebPagetest

Test a website's performance

Test Location
Browser 0 Pending Tests

Connection

BW Down	BW Up	Latency	Packet Loss
Kbps	Kbps	ms	%

Number of Tests to Run
Up to 9
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.
Disable JavaScript
Clear SSL Certificate Caches
Internet Explorer and Chrome
Ignore SSL Certificate Errors
e.g. Name mismatch, Self-signed certificates, etc.
Disable Compatibility View (IE Only)
Forces all pages to load in standards mode
Capture network packet trace (tcpdump)
Save response bodies
For text resources
Preserve original User Agent string
Do not add PTST to the browser UA string
User Agent String
(Custom UA String)
Minimum test duration
Capture data for at least... seconds
Custom headers
Add custom headers to all network requests emitted from the browser

Chrome-specific advanced settings:

Capture Lighthouse Report (Mobile devices only)
Emulate Mobile Browser
Capture Dev Tools Timeline
Capture Chrome Trace (about://tracing)
Trace Categories
(when tracing is enabled)
Capture Network Log
Enable Data Reduction
Chrome 34+ on Android
Host Resolver Rules
i.e. MAP * 1.2.3.4
Command-line
Custom options

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

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

HTTP Basic Authentication
Username
Password

Check out the documentation for more information on this feature

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

Block Requests Containing...
Space separated list

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)...

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

Custom Metrics:

Run a free website speed test from multiple locations around the globe using real browsers (IE and Chrome) and at real consumer connection speeds. You can run simple tests or perform advanced testing including multi-step transactions, video capture, content blocking and much more. Your results will provide rich diagnostic information including resource loading waterfall charts, Page Speed optimization checks and suggestions for improvements.

If you have any performance/optimization questions you should visit the Forums where industry experts regularly discuss Web Performance Optimization.

Recent Industry Blog Posts	Recent Discussions
Magento profiler not showing simple fix Monitoring the UX with Start Render, Visually Complete, and Speed Index How Content Delivery Networks (CDNs) Can Help Media? Magento 2 site optimization worthless extension APIs 101: What to Test more... The journey to Thumbor, part 1: rationale Magento 2 slow in developer mode - 3 simple fixes How to Integrate Performance Testing in Pre-Production Image Optimization in 3 easy steps CDN market news and announcements in June 2017 Velocity San Jose: Four Takeaways About Evolving as a Digital Business How to optimize CSS delivery on Magento website Win as a Team with Rigor: Refer a future client! Quick stats on html/js/css sizes	Setting up a Webpagetest Relay Server B rating for static content caching but no cache control headers sent? Over 800ms dns connection for California USA - EC2 - Chrome - Cable Long waiting time on "processing result" - whats happening there? Debugging a rogue request more... Image Analysis [Private Instance] Error in logs: The test was not started but the test job could not how to create and connect wpt test agents on centos Long Loads & Erratic TTFB Expiration of result URL Animated pages and visual metrics Private instance create video not working Different results in webpagetest when I'm logged in and not logged in Problem with webpagetest Slow test execution with latest server bits plr in connectivity.ini iOS 10, WPT support and jailbreaking Broken screenshots on Chrome when mobile emulation is on CDN Functionality Inconsistent Test History Running test against Chrome or Firefox don't work Lock down web UI using api key Waiting at the front of the queue.[Private Instance] Time To First Byte Blues... What does this signify Strange inconsistent results

Recent Industry Blog Posts

Recent Discussions

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