What this is actually doing.
This runs a focused automated pass in the browser so you can inspect the result instead of handing the whole job to a larger app.
Smart / Local Tools
Add film grain to an image.
Take the digitally-clean edge off a photo or artwork with adjustable grain, colour tint, faded blacks and vignette, without opening a full editor.
Colour & finish
Tip: grain that looks elegant on a large image can become muddy after social-media compression. Start lighter than you think, especially for small exports.
Private by design: the image stays in this browser tab.
Useful to know
Four things worth knowing.
Where it stops.
It solves the named job, not every problem around it.
What to inspect.
Automatic results still need a human check around edges, text, faces and small details.
Worth knowing.
Keep the original until the finished result has worked in the place you made it for.