Tested resources

Practical guides for everyday digital tasks

Clear methods, limitations and examples written to help you get a reliable result, not merely use a button.

WebP vs JPG vs PNG: a practical format guide

Choose between WebP, JPG and PNG using transparency, compatibility and image type rather than guesswork.

A repeatable way to lower image file size while protecting detail, text and color gradients.

Understand aspect ratio, target dimensions and when cropping is better than forcing width and height.

Prepare adaptable square, portrait and landscape images without relying on a brittle list of platform pixel sizes.

Choose a QR error-correction level and test a code before printing signs, labels or packaging.

Use the correct text metric for writing limits, form validation, storage and API payloads.

Understand why emoji and multilingual text can use more bytes than their visible length suggests.

Convert titles into consistent slugs while preserving meaning and avoiding accidental collisions.

Use cryptographic randomness, unique credentials, a password manager and multi-factor authentication together.

Calculate and communicate percent changes correctly with clear formulas and examples.

Diagnose unsupported links, unavailable media and browser download problems without exposing private content.

Learn what local browser processing protects, what it does not protect and how to verify a tool's behavior.