Best Icon Format for ATblogs

If you are like me, a perfectionist or just cannot settle for less, you probably often spend time testing which image formats are supported by each platform. Here are the results for each Standard.site-compliant blog platforms in the ATmosphere network.

(in alphabetical order)

• GreenGale 🍃: use a high resolution .png, it will be resized and compressed; other image formats are converted to image/png
• Leaflet 🍀: .webp works perfectly; .png is a secondary option
• Offprint 📖: .png is the best; .webp is not yet supported
• Pckt 👝: you can't go wrong with .webp, of course .png is supported

If you need a tool for optimizing images while keeping the quality high, I recommend Squoosh. It is pretty simple and self-explanatory.

While it is web-based, everything happens client-side or in your browser. Once you have an optimized blog icon, upload it to your Standard.site-compliant blog!

Enjoy!

Cover image: 〈icons〉 by Rcondo is marked CC0 1.0 Universal.

This article was first published on Offprint platform on 2026-03-28 @850.00 (04:24:00 UTC+8).

〈Best Icon Format for ATblogs〉 © 2026 Yohan Yukiya Sese Cuneta (ISNI | ORCID iD).
License: Creative Commons Attribution-ShareAlike 4.0 International (CC-BY-SA-4.0), except where noted.