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Images are usually the heaviest part of a web page. These practical steps cut their size dramatically while keeping them sharp.
MD5 is fast and everywhere, but is it safe? This guide compares MD5, SHA-1 and SHA-256 and explains what to use for checksums, signatures and passwords.
JSON is everywhere, but a single misplaced comma can break an entire API call. Here is how to read, format and validate JSON quickly.