Access new and in-depth performance metrics and frame-by-frame visuals of your user experience from the latest browsers, around the world.

locations

USA - East

USA - West

Canada

Brazil

Europe (7)

Asia Pacific (13)

South Africa

Middle East (2)

Browsers

Chrome Stable

Chrome Beta

Chrome Dev

Firefox Stable

Firefox ESR

Firefox Beta

Microsoft Edge

Brave

Metrics

Core Web Vitals

Page-Level Metrics

Request-Level Metrics

Speed Index

Lighthouse

Visual Comparison

Film Strips

Video Replay

Waterfall Correlation

Highlighted metrics

Access new and in-depth performance metrics and frame-by-frame visuals of your user experience from the latest browsers, around the world.

locations

USA - East

USA - West

Canada

Brazil

Europe (7)

Europe - West

United Kingdom

Ireland

France

Netherlands

Germany

Italy

Sweden

South Africa

Bahrain

Mainland China

South Korea

Japan

Taiwan

Indonesia

India

UAE

Thailand

Browsers

Chrome Stable

Chrome Beta

Chrome Dev

Firefox Stable

Firefox ESR

Firefox Beta

Microsoft Edge

Brave

Metrics

Core Web Vitals

Technical Page

Page-Level Metrics

Speed Index

Interactivity

Lighthouse Summary

Optimization Checks/Grades

Request-Level Metrics

Visual Comparison

Film Strips

Video Replay

Side-by-side Video Comparisons

Waterfall Correlation

Highlight Layout Shifts

Highlight LCP

Highlight Visual Complete

Integrate WebPageTest
Anywhere

locations

CI / CD

Bring performance into the development conversation. Test code changes against performance budgets and get detailed performance information right in your existing workflow.

Browsers

Visualization

Bring performance into your developer conversations. Evaluate each new release compared to your perfomance budget. Size of javascript or first contentful paint. If test is over your threshold, you'll errors.

Browsers

investigation

product

FAQ

How do you define a test run? What metrics can I access with the API?

A test run on WebPageTest is defined as a single run within a test set up to measure webpage performance on a specific browser and location. For example, if you run a 5-run test with Repeat View, then that counts as 10 test runs.

You can access all the performance metrics that you would when you run a manual test on WebPageTest listed here. Including the film strip view as well as video capture. WebPageTest API also gives you additional metrics you get in JSON/XML only such as those listed here.

What countries and browsers do you support with the WebPageTest API?

With WebPageTest API, you can test across 30 locations worldwide, including mainland China.

WebPageTest API is always up-to-date on the current version of every browser and you can test on Chrome (stable, beta, canary), Firefox (stable, beta, ESR), Microsoft Edge (dev) and Brave.

WebPageTest API also supports mobile emulation testing. You can test mobile content by emulating an Android browser by passing “mobile=1” as an API option.

Is there a daily/monthly limit to the tests run? How long do I have access to test results?

There is a monthly limit on the total tests you can run with the WebPageTest API, based on the subscription plan you choose. There is currently no daily limit on top of that monthly limit.

Do you provide any integrations that I can use with the API?

We currently support the following:
‍
- WebPageTest API wrapper: NPM package that wraps WebPageTest API for NodeJS as a module and a command-line tool
- Github actions

There are also several existing integrations built by our community members that you can try out to build on top of the WebPageTest API. Check out some of them here.

How will I be charged?

For monthly and annual subscriptions plans, your credit card will be automatically billed when you sign up and purchase the subscription, you’ll be able to access your payment history under Billing History in My Account on For Enterprise plans where you want to run more than 25000 tests per month, please contact us here.

If you are based out of the United States of America, You will be charged in US Dollars, but the exact amount you will see on your credit card statement may vary, depending on foreign exchange rates and any foreign transaction fees your bank may impose.

What payment methods do you support?

We accept payment via Credit Card (VISA, Mastercard, American Express, JCB, Maestro, Discover, Diners Club International, UnionPay). Please ensure the accuracy of your payment method and that it is properly funded to avoid any issues with payment acceptance.

We do not accept and will not ask you to provide payments with cash or a physical check.

For enterprise plans, requiring more than 25K tests per month, we offer invoicing. Contact us.

How secure is my payment?

All payments are securely processed over HTTPS and your card information never touches our servers. All payment processing is done by a level 1 PCI compliant third-party credit card processor. All details are sent over SSL, which is a 2048-bit RSA-encrypted channel. Our payment gateway also adheres to card networks’ requirements and regulations surrounding payment processing.

Can I add more users to the subscription plan?

Currently, we only support one user account to sign in and set up your account to purchase the WebPageTest API. However, you can generate up to 30 keys for multiple use cases and teams, from a single WebPageTest API account. Generate a new key by clicking on “+ API consumer”.

We have plans to support adding multiple users and defining roles in the future.

What is the cancellation policy?

You can choose to cancel anytime during the subscription period. Once you choose to cancel, it stops the WPT API subscription from auto-renewing for the next billing cycle. You’ll continue to have access to run tests for that plan, until the end of your current billing period. When you cancel, you cancel only the subscription. You’ll continue to have access to the WebPageTest account and history of the manual tests you ran with that account. Please note all subscriptions are automatically renewed unless explicitly cancelled.

Explore the API Docs
Head to the forum
Read the blog

Build faster pages.

Programmatic access to WebPageTest lets developers continuously deliver faster web pages with the deepest front-end performance metrics within their workflow.

"I've used WebPageTest to do XYZ and it's been nothing but great."

Andy Davies

PERFORMANCE ANALYST & CONSULTANT

Access new and in-depth performance metrics and frame-by-frame visuals of your user experience from the latest browsers, around the world.

Core Web Vitals is really important to your SEO value. Google is counting performance again your search rankings and using these metrics to measure this.

Core Web Vitals is really important to your SEO value. Google is counting performance again your search rankings and using these metrics to measure this.

Core Web Vitals is really important to your SEO value. Google is counting performance again your search rankings and using these metrics to measure this.

Core Web Vitals is really important to your SEO value. Google is counting performance again your search rankings and using these metrics to measure this.

Core Web Vitals is really important to your SEO value. Google is counting performance again your search rankings and using these metrics to measure this.

Core Web Vitals is really important to your SEO value. Google is counting performance again your search rankings and using these metrics to measure this.

Core Web Vitals is really important to your SEO value. Google is counting performance again your search rankings and using these metrics to measure this.

Core Web Vitals is really important to your SEO value. Google is counting performance again your search rankings and using these metrics to measure this.

Access new and in-depth performance metrics and frame-by-frame visuals of your user experience from the latest browsers, around the world.

Core Web Vitals is really important to your SEO value. Google is counting performance again your search rankings and using these metrics to measure this.

Core Web Vitals is really important to your SEO value. Google is counting performance again your search rankings and using these metrics to measure this.

Core Web Vitals is really important to your SEO value. Google is counting performance again your search rankings and using these metrics to measure this.

Core Web Vitals is really important to your SEO value. Google is counting performance again your search rankings and using these metrics to measure this.

Core Web Vitals is really important to your SEO value. Google is counting performance again your search rankings and using these metrics to measure this.

Core Web Vitals is really important to your SEO value. Google is counting performance again your search rankings and using these metrics to measure this.

Core Web Vitals is really important to your SEO value. Google is counting performance again your search rankings and using these metrics to measure this.

Core Web Vitals is really important to your SEO value. Google is counting performance again your search rankings and using these metrics to measure this.

Core Web Vitals is really important to your SEO value. Google is counting performance again your search rankings and using these metrics to measure this.

Core Web Vitals is really important to your SEO value. Google is counting performance again your search rankings and using these metrics to measure this.

Integrate WebPageTest Anywhere

Integrate WebPageTest Anywhere

Flexible Pricing for companies & developers

Start testing with WPT API at just $9.89/month 1200 tests. Choose from additional pricing plans to match your monthly testing volume.

For more information, check out our WPT documentation.

All plans include:

FAQ

How do you define a test run? What metrics can I access with the API?

What countries and browsers do you support with the WebPageTest API?

Is there a daily/monthly limit to the tests run? How long do I have access to test results?

There is a monthly limit on the total tests you can run with the WebPageTest API, based on the subscription plan you choose. There is currently no daily limit on top of that monthly limit.

Do you provide any integrations that I can use with the API?

How will I be charged?

What payment methods do you support?

How secure is my payment?

Can I add more users to the subscription plan?

What is the cancellation policy?

More Questions?

Explore the API DocsHead to the forumRead the blog

Integrate WebPageTest
Anywhere

Integrate WebPageTest
Anywhere

Explore the API Docs
Head to the forum
Read the blog