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Guides

Plain-English explainers on image formats and when to convert — so you pick the right format instead of guessing.

What is QOI, the Quite OK Image format?

QOI is a tiny, fast, lossless image format from 2021. Here's what it is, who uses it, how it compares to PNG, and how to open or create .qoi files.

AVIF vs WebP vs JXL: which image format to use

A practical, honest comparison of AVIF, WebP, and JPEG XL vs PNG/JPEG — compression, browser support, transparency, and which to actually ship in 2026.

What is HEIC, and how do you open it?

HEIC is the format your iPhone saves photos in. Here's what it is, why Windows and other apps won't open it, and how to convert HEIC to JPG or PNG for free.

What is Base64, and when should you use it for images?

Base64 turns binary files into text so you can embed images directly in HTML, CSS, or JSON. What it is, when to use data URIs, and how to encode or decode them.

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