[domedefelice]

Gaining the confidence of the user is not easy:

1) I think you should state explicitly that the compression is lossless (if it is);

2) You should provide some kind of demos/examples to look at.

Good job anyway!

[mwarkentin]

Image compression is lossless.. I really should call that out on the home page. Demo / examples are definitely on my list.. here's an example PR for you: https://github.com/shrinkrayio/demo-images/pull/6

[sauere]

Also, do you preserve metadata (EXIF etc.)?

[mwarkentin]

I believe metadata gets stripped out, which is how I get some lossless size reduction for jpgs. In my experience, this is not something that we've been interested in preserving on our images (use case - websites).

Would you be looking at using this to compress some photos for personal use, or for a photography website? What would be your use case?

[sauere]

JPGs can be optimized without losing metadata. Google "jpegtran". It does some optimizing of the data representation while staying loseless.