SajinbaroImage guides
How to work with image dimensions, file size and formats, with worked examples. Only guides checked against their sources are published.
- Pixel dimensions vs file size
Halving an image's width and height leaves a quarter of the pixels. How pixel dimensions, megapixels and file size relate, and the order that shrinks files most.
- JPEG vs PNG vs WebP: which format to use
JPEG for photos, PNG for transparency, text and screenshots, WebP for smaller files where it is accepted. The differences and what to check before you choose.
- How to compress an image without uploading it
Browsers can resize and re-save images on your own device. How local processing works, how to check that a tool really keeps files local, and its limits.