How can I test a YARA rule online for free?

Open YARA Playground Online, paste or write your rule in the Rule Editor, add a sample, and click Run — no install, no cost.

Does YARA Playground run completely in my browser?

Yes. The validator compiles libyara-wasm and performs the scan client-side, so your samples never leave your device.

You can upload text or binary samples up to 10 MiB for validation.

The playground runs the official libyara engine compiled to WebAssembly, ensuring rule parity with the CLI.

Yes — the validator is completely free to use and open-source. Support via Buy-me-a-Coffee is optional.