CSTesting enables reliable solutions
for modern teams.
Any browser • Any platform • One API
Cross-language
Use the CSTesting API in TypeScript, JavaScript, Java, and Python Coming soon, C# Coming soon.
Cross-browser
CSTesting supports all modern rendering engines including Chromium, Firefox Coming soon, and Edge Coming soon.
Cross-platform
Works on Windows, Linux, and macOS, locally or in the cloud. Run headless or with a visible browser.
Simple API
One consistent API across languages. Write once, run everywhere with the same behavior.
Modern stack
Built for today's web. Supports modern rendering, shadows, and dynamic content out of the box.
Mobile ready Coming soon
Emulate mobile viewports and devices. Test responsive layouts and touch interactions.
Resilient • No flaky results
Auto-wait
Waits for elements to be ready before acting. Fewer arbitrary timeouts and more stable runs.
Smart assertions
Assertions built for the dynamic web. Checks retry until conditions are met or timeout.
Tracing & debugging Coming soon
Capture traces, screenshots, and videos. Inspect failures with full context and replay.
Full isolation • Fast execution
Isolated contexts
Each run gets a fresh context. Full isolation with minimal overhead and quick startup.
Reuse state
Save and reuse authentication or state. Skip repeated setup while keeping tests independent.
Ready to get started?
Jump in with our quick start guide or explore the docs.