About YARA Playground & Validator
YARA Playground—also reachable at YARAValidator.com—is a free, browser-based tool that lets security researchers, malware analysts, and DevSecOps engineers write, validate, and test YARA rules online instantly. No setup, no downloads, and no privacy worries: every scan runs entirely inside your browser via WebAssembly.
Why an Online YARA Validator?
YARA has become the de-facto standard for identifying files based on
textual or binary patterns. Unfortunately, setting up a local YARA
environment can be tedious—especially on locked-down workstations.
YARA Playground removes that friction. Paste or upload a sample,
write your rule, and hit Run. Behind the scenes, the
high-performance libyara-wasm engine compiles your rule
and scans the sample—all without leaving your machine.
Key Features
- Real-time rule compilation with detailed error reporting
- Fast scans powered by WebAssembly-optimised YARA-X
- Rich JSON results with string offsets, previews, and metadata
- Binary file uploads up to 10 MiB for deep inspection
- LocalStorage persistence so your work survives page reloads
- No server-side processing—your samples stay private
Privacy-First
The playground is served statically from Netlify's global CDN. No samples or rules are ever sent to a back-end server, ensuring your sensitive data remains on-device.
Support My Work
If you find YARA Playground helpful, you can buy me a coffee ☕ to fuel further development. Thank you!