Guides

Practical how-tos that go with our tools, from compressing images to understanding UK tax.

Shrink JPG, PNG and WEBP files for faster websites while keeping them sharp. Practical settings that work.

Add or remove 20 percent VAT, understand the reduced and zero rates, and avoid common mistakes.

Combine several PDFs into one document without uploading them anywhere.

How income tax and National Insurance reduce your gross salary, with the main thresholds.

Fix JSON syntax errors fast and learn the rules that trip people up.

How Stamp Duty Land Tax bands work, first-time buyer relief and the surcharge on additional homes.

What makes a password hard to crack and how to manage dozens of them safely.

Create a QR code for a link or text, choose the right size and make sure it scans.