Guides

Background reading for the tools: what the settings mean and how to get good results.

• How Image Compression Works: JPEG vs WebP Quality ExplainedWhat the quality slider actually changes, why JPEG and WebP behave differently, and how to pick settings that keep photos sharp but small.
• How to Make a QR Code That Scans ReliablyPractical rules for size, contrast, quiet zone, error correction and content length so your QR code works on the first try.
• Choosing a Strong Password: Length, Randomness and EntropyWhy length beats clever substitutions, what entropy in bits means, and how to combine generated passwords with a password manager.