QOI vs PNG: Next-Gen Fast Lossless Image Format vs Universal Web Standard
Compare Dominic Szablewski's Quite OK Image (.qoi) format with standard Portable Network Graphics (.png). Explore compression speeds, decode performance, and lossless image workflows.
Quite OK Image (.qoi) is a modern, ultra-fast lossless image compression format designed by Dominic Szablewski in 2021 as a simpler, faster alternative to PNG. PNG is the undisputed universal raster graphics standard for the web, digital graphics, and application user interfaces.
| FEATURE | QOI | PNG |
|---|---|---|
| Compression Type | Lossless (Index, Diff, Luma, Run) | Lossless (Deflate / Zlib + Filtering) |
| Decode Speed | Ultra-fast (single-pass linear byte stream) | Moderate (Deflate decompression overhead) |
| Browser Support | Requires custom JavaScript / WebAssembly decoder | Universal native browser support |
| Alpha Transparency | Full 8-bit alpha channel | Full 8-bit alpha channel |
| Specification Complexity | Minimal (single C file / ~300 lines) | Complex (multi-stage filtering & RFC 1951 Deflate) |
- Encodes and decodes 20x to 50x faster than standard PNG libraries
- Lossless compression ratios comparable to PNG across typical game textures and photos
- Extremely simple 1-page specification with zero third-party library dependencies
- Ideal for game development, runtime asset streaming, and embedded systems
- 100% native rendering support across all web browsers, operating systems, and image viewers
- Standard RFC 2083 container with Deflate compression and extensive chunk metadata
- Supports full 32-bit RGBA color with 8-bit alpha transparency and color management profiles
- Ubiquitous tooling across Photoshop, Figma, GIMP, Blender, and digital photography apps
QOI is an engineering breakthrough for game developers, embedded graphics, and rendering pipelines needing instant lossless compression and decompression. Convert QOI images into standard 32-bit RGBA PNG for universal web sharing, social media display, and compatibility with desktop graphic suites.
Converting files between QOI and PNG frequently? The convrtr Chrome Extension lets you right-click any image on any webpage or open the Side Panel to convert assets instantly using local WebAssembly with zero server uploads.