How it compares
| HTML + CSS · 2000s | HTML5 · average today | HTML67 | |
|---|---|---|---|
| Typical build | hand-written HTML, one CSS file | framework + bundler + utility CSS + component libs | native elements, no build |
| Total page weight | ~50–200 KB | ~2–5 MB | ~150–400 KB |
| Loading time | ~1–3 s (slow line) | 3–10 s | < 1 s |
| External servers / origins | 0–1 (just your own) | 8–20+ (CDNs, fonts, analytics, embeds, ads) | 1 (your own) |
| CDNs / third parties | none, or one for jQuery later | 5–150 | none |
| HTTP requests | 5–15 | 70–150+ | 1–10 |
| Legal (DSGVO · DMA · accessibility) | no | no | yes — built in |
| Renders without server / network | yes | rarely (CDN-dependent) | yes |
| AI- & SEO-ready (machine-readable meaning) | no | no | yes |
| Universal standard (web · print · apps) | no | no | yes |
Performance
Data centres are racing toward 950 TWh a year — near 3% of the world's electricity by 2030, growing more than four times faster than demand overall (IEA, Energy & AI 2025). And most of what they move isn't meaning. Around 70% of all web traffic now flows through CDNs — by some counts over 80%. Much of that is video, but for the pages, apps and documents people actually read, a large share of every transfer isn't content at all. It's scaffolding: framework code, duplicate libraries, dependencies, trackers — markup written to be rendered, not understood. HTML67 ships the meaning and drops the scaffolding. Here's what that saves.
A modern page ships ~3 MB to deliver ~20 KB of real meaning — the HTML is barely 1% of the download; the rest is frameworks, fonts and images. HTML67: ~200–400 KB.
Source: HTTP Archive / Web Almanac 2025 — median desktop page ~2.6 MB, ~180× heavier than the 90s; JS ~25% of weight.
A typical page fires 70–150+ requests across 10–20 origins — CDNs, fonts, trackers, embeds. HTML67: 1–10, from one server, zero CDNs in front.
Source: HTTP Archive / Web Almanac 2025 — median page ~70+ requests; 92% of sites load third-party scripts.
Servers are ~60% of data-centre electricity; every framework re-render, duplicate dependency and third-party call adds load. Fewer bytes and no third parties means less to process.
Source: IEA Energy & AI 2025 — servers ~60% of data-centre power; data centres ~1.5% of global electricity, doubling to ~950 TWh by 2030.
A semantic <price> or <norm> says in one tag what
class-soup takes twenty to imply — so a crawler indexes less and a model reads fewer tokens for the same meaning.
Source: IEA Energy & AI 2025/26 — a simple AI query draws ~10× a web search; per-page token savings measured vs. a typical framework + utility-CSS build.
Dig deeper via the sidebar: HTML6, HTML7, GlyphMarkdown, Design-DNA.