This free online image analysis tool gives you a lot of information found in the given image (JPEG, PNG, WebP and GIF).
- Extracts Exif, IPTC, XMP, Photoshop's own data
- Extract embedded ICC profile (downloadable)
- JPEG: Quantization tables (luminance and chroma)
- JPEG: Embedded thumbnail preview
- JPEG: Estimated quality level based on quantization tables
- JPEG: Linked OSM and Google Maps location based on embedded GPS data
- PNG: Compression view
- PNG: Separated alpha channel for "dirty transparency" check
- … much more
The big image compression tool comparison
There are a lot of articles about online image compression tools in the net, most of them are very superficial.
Usually they end with a simple: "It generates smaller pictures, so it's got to be better."
Learn why such statements are most of the time meaningless, understand the technical background, and find out which tool you should use as of today.