Guides

The background knowledge behind the tools — what each format is actually for, why a file is the size it is, and which numbers matter when you print.

• JPG vs PNG vs WebP vs AVIF: which should you use? A plain comparison of the four formats that matter, what each is actually good at, and the three rules that cover almost every decision. Updated 19 September 2026
• How to reduce image file size without wrecking it Why images are large, the order of operations that actually works, and how to hit a specific file size like 100 KB without the picture falling apart. Updated 19 September 2026
• Image sizes for every social platform Current pixel dimensions, file size limits and formats for Instagram, YouTube, LinkedIn, X, Facebook, TikTok, Pinterest and the major marketplaces. Updated 19 September 2026
• What your photos reveal, and how to remove it EXIF records where and when a photo was taken, and on what. What is actually in there, who can see it, and how to strip it without degrading the image. Updated 19 September 2026
• DPI, PPI and print size, explained properly Why changing the DPI number does nothing to your image, what actually determines print quality, and how to work out whether a photo is big enough to print. Updated 19 September 2026