---
title: "Building a World Map with only 500 bytes — Stuff That Spins"
description: "Building a World Map with only 500 bytes Iwo Kadziela (assisted by Codex) figured out a way to generate a credible ASCII world map using 445 bytes of data: The key trick is to use deflate compression, which is then wired together using this neat snippet of JavaScript. I didn't know you could use fe…"
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date: "2026-07-04T23:09:02+00:00"
modified: "2026-07-04T23:30:51.787605+00:00"
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# Building a World Map with only 500 bytes

**Source:** Unknown  
**Published:** July 4, 2026  
**Original:** https://simonwillison.net/2026/Jul/4/building-a-world-map-with-only-500-bytes/#atom-everything  

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*HTML version: https://stuffthatspins.com/spin/building-a-world-map-with-only-500-bytes*