Preview any site in a phone, tablet or laptop frame and see the breakpoints it actually hits.
Mask, wildcard, network and broadcast addresses, first and last usable host, and how many hosts a prefix really gives you.
Write a correct robots.txt with your sitemap attached, and optionally block AI training crawlers by name.
How long a transfer really takes, and what upload speed a video call actually needs.
Brightness, contrast, saturation, temperature, highlights and shadows applied to the real pixels.
Eight real per-pixel filters - blur, sharpen, pixelate, grayscale, sepia, invert, posterize, tint.
Real per-channel histograms with mean, standard deviation, median and quartiles from the decoded pixels.
Dimensions, alpha coverage, bits per pixel and the format sniffed from the actual file bytes.
