---
title: "Pixel Peeper · compression eye exam"
description: "A vision test for image compression. Pick the best-looking of three encodes, over and over, and it profiles what your eye is quietly tuned to. Real encodes (zenc, jpegli, mozjpeg, sips; 4:2:2 vs 4:2:0) scored by ssimulacra2 and butteraugli, so the twist is which rival metric your eye actually agrees with."
path: "/pixel-peeper"
section: "pixel-peeper"
kind: "utility"
updated: "2026-07-21"
source: "https://aadhar.sh/pixel-peeper"
---

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Source: https://aadhar.sh/pixel-peeper