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Responsive Web UI Testing That Actually Opens a Browser

Most responsive bugs are not visible in a unit test or a component story — they appear when a real browser lays out a real page at a real width. TestSprite runs your flows against the deployed site in a cloud browser, so a navigation menu that traps focus at a narrow viewport is caught before a user finds it.
Type
Solution
Language
English

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This is responsive web testing — a browser at different viewport widths. We don't drive native iOS or Android UI, emulators, or device farms.

Real Browser, Real Layout

Tests execute against a live browser in the cloud, not a simulated DOM. Overflow, wrapping, sticky headers, and tap targets behave the way they will for a visitor.

Describe the Flow, Not the Selectors

A test is a plain-language plan: open the menu at a narrow width, confirm the primary link is reachable. No brittle CSS selectors to rewrite the next time the layout changes.

Catch Interaction, Not Just Pixels

Screenshot diffing tells you something moved. TestSprite tells you the checkout button became unreachable behind a sticky footer — a functional failure with a root-cause hypothesis attached.

Runs on Every Deployment

Connect the GitHub App and every preview deployment is checked automatically, so a layout regression is caught on the pull request rather than after release.

Priority
Test
Status
HIGH
TC001_Nav_Menu_Opens_At_Narrow_Width
Pass
HIGH
TC002_Checkout_Button_Reachable_Above_Fold
Failed
MEDIUM
TC003_Table_Scrolls_Without_Page_Overflow
Warning
MEDIUM
TC004_Modal_Traps_Focus_Correctly
Pass
LOW
TC005_Footer_Links_Stack_Without_Clipping
Pass

Ship Layout Changes Without Holding Your Breath

A CSS change that looks right on your monitor can break the only path a visitor has to your signup form. Verify the flows at the widths that matter, automatically, on every change.

Built for Teams Shipping Responsive Web

Scheduled Monitoring

Re-run responsive flows on a schedule against staging or production, so a regression introduced by a dependency upgrade surfaces without anyone remembering to look.

Smart Test Group Management

Group flows by journey — auth, onboarding, purchase — and run the critical ones on every deployment while the long tail runs nightly.

Free Community Version

Offers a free community version, making us accessible to everyone.

End-to-End Coverage

Comprehensive testing of your web frontend UI and the backend APIs behind it, so a layout pass and a contract change are covered by the same suite.

Trusted By Businesses Worldwide

"Good job! Pretty cool MCP from TestSprite team! AI coding + AI testing helps you build better software easily!"

"TestSprite offers rich test case generation, clear structure, and easy-to-read code. It also supports simple online debugging with the ability to quickly expand by generating new test cases."

"TestSprite's automation helps us reduce tons of manual work. The developers can easily catch and resolve bugs earlier in the development process."

FAQ

Is this native mobile app testing?

No. This is responsive web testing — a real browser rendering your site at different viewport widths. TestSprite does not drive native iOS or Android UI, emulators, simulators, or device farms.

How is this different from screenshot diffing?

Screenshot tools tell you pixels changed, which is noisy on a site that changes often. TestSprite runs the flow and asserts on behaviour — whether the menu opens, whether the button can be clicked — and returns a root-cause hypothesis when it cannot.

Do I have to write browser automation code?

No. Tests are plain-language plan files with action and assertion steps. testsprite test create --plan-template prints a schema-correct skeleton, or testsprite test plan generate drafts the first set for review.

Can it run automatically on every deployment?

Yes. Connect the GitHub App and TestSprite listens for the deployment event your pipeline already produces, tests the resulting preview URL, and comments the result on the pull request — with no workflow file and no repository changes.

What about accessibility at narrow widths?

Flows can assert on focus order, keyboard reachability, and whether a control is actually operable — the interaction failures that matter most when a layout collapses to a single column.

Is it free to start?

There is a free community version, and the open-source CLI is free to install and Apache-2.0 licensed. Test execution consumes workspace credits — 0.5 per frontend run.

Catch Responsive Regressions Before Your Users Do