Your image does not need to be uploaded
Client-side canvas processing can work entirely inside the active browser tab. This reduces exposure for personal photos, identification images, internal screenshots, and unreleased product assets.
Local does not mean risk-free
Use a trusted copy of the website and inspect whether it makes network requests if confidentiality matters. Browser extensions, a compromised device, or modified code can still affect privacy. Avoid public computers for sensitive work.
You control the saved result
The output is downloaded directly to a location you choose. Close the tab when finished and handle the file according to your own storage policy. Local processing is especially useful when a simple format change does not justify sharing the source with another service.