Image guides
Short, practical answers to the questions that come up while resizing, cropping, filtering and converting images.
Social media image sizes — a cheat sheet that actually saves you time
The pixel sizes that matter for Instagram, YouTube, X, LinkedIn, Facebook and Pinterest, plus the three rules that let you stop looking sizes up altogether.
Aspect ratios, explained: 1:1, 4:5, 16:9 and when each one is right
What an aspect ratio actually is, which one every common destination expects, and how to crop to a ratio without cutting the subject in half.
How to get an image under an upload limit — without it looking bad
A repeatable order of operations for shrinking image files: dimensions first, then format, then quality. With realistic numbers for a 2 MB form, a 25 MB email and a web page.
HEIC to JPG: why iPhone photos will not open, and how to fix it
What HEIC is, why Windows and half the web still refuse it, the three ways to stop your phone producing it, and how to convert a folder of them without uploading anything.
WebP vs AVIF vs JPEG vs PNG — which format, and when
A practical comparison of the four image formats that matter in 2026: compression, browser and app support, transparency, and a decision list you can follow in ten seconds.
How to resize hundreds of photos at once, without uploading them
A working method for batch resizing: which sizing mode survives mixed orientations, what order to apply operations in, how to name the output, and where large batches actually fail.
How to resize an image without losing quality
What actually degrades an image when you resize it, why downscaling in steps looks better, why upscaling cannot work, and what DPI has to do with any of it.