How to run the same edit on a folder of photos

A folder of photos usually needs one choice applied many times: one quality, one format, one crop, one watermark. PicZero keeps the files you added as a list in the current tab, so you do not repeat that choice on every image.

A folder is not an upload

Dropping a folder, or choosing many files, gives the browser permission to read them. Processing happens on this machine. MSH's servers do not receive the file bytes, and there is no queue, account, or usage cap. The same rule covers a single compress or format conversion.

The list lives in this tab. Until you download, a result is not a file on disk. Close the page and undownloaded results are gone. The originals already in the folder are untouched.

One image, then the rest

Set the options on the first image and check two things: whether the size meets the receiver's limit, and whether edges and text still hold. The compress page shows the size before and after. A quality of 70% that suits a landscape can blur a screenshot of an interface. A portrait crop placed on a wide photo cuts the sides off. If the first image is wrong, change the setting. Do not run two hundred files first.

After that check, the same settings apply to the rest of the list. Rename rules are shared too, so you do not download a hundred files with one name.

What can be batched, and what cannot

Parameters can be shared: compress quality and target kilobytes, convert format, quality, and flatten color, plus crop, rotate, and watermark. What you draw cannot. Cutout keep and erase strokes stay on the current photo. See cut out locally. The same is true of doodles and mosaic. Settings fan out. Strokes have to be judged one image at a time.

The original is still there when you download

Save one new file, or a zip of many. Compress names its archive compressed-images.zip. Convert names its archive converted-images.zip. Put the new files beside the originals and replace your own archive only when you mean to. PicZero does not write back to the path you dragged in.

In the same tab, a result can move to the next tool without another pick from disk. If the folder only has a size problem, stop at compress. If the receiver also requires JPG or WebP, continue with format conversion.