Learn

Plain-language guides to image formats, compression, and photo technology, written by the people who build browser-based tools for them.

Image formats

Why Apple Uses HEIC Instead of JPG

Why iPhones abandoned JPEG for half the file size, 10-bit HDR color, depth maps, and hardware encoding, and why the web never followed.

Why AVIF Beats JPEG and WebP

The royalty-free format that brought video-codec compression to the open web, and what it does better than the formats that came before it.

WebP vs PNG: Which Should You Use?

WebP is usually smaller, but PNG still wins in specific, predictable situations. A practical decision guide with the edge cases spelled out.

HEIC and AVIF Under the Hood

A technical deep dive into video-codec image formats: intra prediction, transforms, entropy coding, containers, and the licensing economics.

Under the hood: how our tools work

How the Background Remover Works

AI segmentation in the browser with ONNX Runtime.

How AI Upscaling Works

Swin2SR super-resolution running locally in WebAssembly.

How Lanczos Resizing Works

Why sinc-based resampling beats the browser's default scaling.

HEIC Conversion and Compression

Native decoding with a WebAssembly fallback.

EXIF Metadata and Privacy

What your photos reveal and how stripping works.

Social Media Image Sizes

The preset dimensions behind the social crop tool.

Aspect Ratio Cropping

How ratio-locked cropping keeps your framing exact.

The tools All 23 tools free, browser-based, nothing uploaded