GUIDE深度 · Deep dive
Why Local Image Processing Matters
Online image tools usually upload the original; if it contains an ID, contract or client data, that upload is a privacy risk. Canvas processing needs no network, and closing the page discards the data.
Benefits of local processing
The original never leaves the device, reducing exposure.
No server queue; speed is stable.
Works offline once the page is loaded.
Still watch out
Browser extensions or malicious scripts can still read the page.
You still need to store or delete the output yourself.
FAQ
Does local processing reduce quality?
Resizing and JPEG compression are lossy; PNG is lossless but larger.
Can it handle RAW?
Browsers generally cannot decode RAW directly.