Guides

These notes explain the tools that are already on GadgetZone. They are not a substitute for the tool pages, which are where the work happens.

Compress images in the browser

What the quality slider changes, and when a resize helps more than a lower quality setting.

How local PDF merging works and what to check before you share the file.

The pieces of an equated monthly instalment and what the calculator does not know.

Length, passphrases, and why the generator stays on your device.

How to spot invalid JSON and why you should not paste live secrets into a shared computer.