Blog
News from Dogu Sangja, and articles that explain concepts and how things work.
JPG, PNG or WebP: which to use and how to reduce file size
How JPG, PNG and WebP differ in compression and transparency, which suit photos and logos, why converting may not shrink a file, and how to hit a target size.
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Why character count and byte count differ
How characters, code points, UTF-16 code units and bytes differ, with examples of UTF-8 sizes, emoji, legacy encodings and how to tell what a limit counts.
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How online tools work without uploading anything
How server-side and in-browser tools differ, and two quick ways to check for yourself that your input isn't sent anywhere, using DevTools and offline mode.
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Percent vs percentage points, and common percent mistakes
Three basic percent calculations and percent vs percentage points, in numbers. Also checks common slips: up then down, stacked discounts, reverse percentages.
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How much protein do you need if you train?
Where the protein calculator's 'If you train' range of 1.2–2.0 g per kg comes from, how it differs from the recommended intake, and how it is worked out.
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What BMI does not tell you
BMI uses only height and weight. Why it cannot see muscle, where fat sits, age or sex, and why waist size is checked too.
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