Browser capability check
Only checks whether the browser has API. Displays a capability matrix including files, Canvas, WebCrypto, and WebCodecs. Does not request permissions.
How to Use Browser Capability Checks
Browser capability checks process input only in the current browser; nothing is uploaded, accessed over the network, or stored.
Input content
Open the page to read the fixed capability list; no content upload is required.
Select a processing method
View the supported, unsupported, permission-required but unrequested, and indeterminate statuses.
Check and export
Copy or download the capability matrix for local troubleshooting.
Limitations and Notes
- The presence of API does not mean the feature is available under the current permissions, device, or browser policies.
- The tool does not request camera, microphone, notification, location, or file system permissions.
- The tool only provides locally processed results; important configurations, secrets, documents, and published content must still be reviewed in the target environment.
FAQ
Will the input be uploaded to a server?
No. The page only uses browser memory, the local file API, and local resources already provided with the site.
Why does it show as supported but still fail in practice?
The capability check only reads the existence of API; permissions, devices, policies, and runtime errors still require separate validation by the target tool.
Why do the results still require manual review?
Edge-case syntax, regional standards, third-party readers, and target runtime environments may differ; the tool does not replace final validation.