Guides
Short, factual notes on the settings that actually matter — and the ones that quietly do nothing.
These guides back up the choices the tools make. They explain what a setting does to your file, where a format simply cannot do what you asked, and how to get a predictable result across a mixed batch of images. They are not padding for search engines: every claim here is something the tools in this site do, and can be checked.
How to compress images without uploading them
What actually happens when a browser compresses an image, how to pick a quality level, and why a PNG will never shrink from a quality slider.
Resizing images for the web
How to choose real pixel dimensions, why the DPI field in your editor does not matter online, and the order in which to crop and resize.
JPEG, PNG, WebP and AVIF explained
When each format is the right answer, what transparency costs you, and how EXIF orientation quietly affects every rotated photo.
Related tools
Each guide links to the tool it describes, so you can test the advice on your own images immediately — locally, with nothing uploaded.