> For the complete documentation index, see [llms.txt](https://developer.harness.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.harness.io/feature-management-experimentation/new-to-fme/sdks-and-customer-deployed-components/client-side-sdks/client-side-thin-sdks.md).
# Client-side Thin SDKs
Harness FME provides client-side SDKs that let you evaluate feature flags, run experiments, and deliver personalized experiences directly in your application's frontend.
Thin SDKs delegate flag evaluation to the **Remote Evaluator** in FME cloud rather than computing treatments locally. Rollout rules stay in the cloud, and the SDK sends the target to FME cloud each time it fetches an evaluation. Use a thin SDK when keeping rollout rules off the client is the deciding factor.
If you have not chosen between local and remote evaluation yet, see [Choosing an evaluation mode](/feature-management-experimentation/new-to-fme/sdks-and-customer-deployed-components/client-side-sdks/evaluation-modes.md).
### Get started
Select a platform to start integrating an FME thin SDK into your client application.