Guides

What Your Photos Reveal: EXIF Data, Location and How to Share Pictures Safely

Photos can carry the date, the phone model and even GPS coordinates. Learn what EXIF data is, how to check it and how to share pictures without giving away where you live.

robots.txt and AI Crawlers: Which Bots to Allow and Which to Block

A practical guide to deciding which AI crawlers may visit your site, how training, search and user bots differ, and how to write and test the rules.

Tokens, Context Windows and Prices: A Plain Guide to AI Costs

What tokens are, how context windows limit your prompts, and how to estimate what an AI feature will cost before you build it, with worked examples.

How to Merge, Split and Shrink PDFs Without Uploading Them

A practical guide to everyday PDF jobs: combining, splitting, reordering, shrinking and signing PDFs in your browser, and what each step does to your file.

HEIC, WebP and AVIF Explained: Why Your Photos Will Not Open and How to Fix It

Why modern image formats like HEIC, WebP and AVIF cause trouble, where they come from, and how to convert them to JPG or PNG without losing what matters.

How to Resize and Compress Photos for Online Forms, from 20KB to 200KB

A practical guide to meeting photo and signature size limits on application forms: crop first, resize, then compress, with fixes for the usual rejections.