Guides & Tutorials

In-depth explanations of the tools and formats you work with every day — with worked examples, practical recommendations, and links to free tools.

PDF Guides

Compress, convert, and archive PDFs — how compression works, PDF/A explained, and conversion trade-offs.

WebP vs AVIF vs JPEG, resizing without blurring, background removal — everything about web image optimisation.

Compound interest by hand, fixed vs variable home loans, EMI calculations — financial maths with worked examples.

JSON vs YAML vs TOML, Base64 encoding explained, JSON formatting — formats and encoding for everyday development.