www.hetzner.com

The numbers

First visit

0.565 g CO₂e

Return visit

<0.001 g CO₂e

Hosting

verified green

LCP

456 ms

CLS

0.026

TTFB

7 ms

At 10,000 views a month this page emits about 50.8 kg CO₂e a year, roughly 208 km in an average petrol car. The estimate assumes 75% new and 25% returning visitors, a measured cache reload ratio of 0%, and world-average grid intensity. How we calculate this

1. Convert and compress imagessave ~0.104 g/visit (1.15 MB)High impact · quick fix

   6 images (1.66 MB) ship in legacy formats (JPEG/PNG/GIF); 1 image exceeds 300 kB apiece.

   Serve AVIF (or WebP) with responsive srcset sizes, and re-compress oversized files. AVIF typically halves JPEG weight at the same visual quality.

   • Bayerns-Best-50-2026-Hetzner-2.jpg1.49 MB
   • Hetzner-Experiments_big.webp952 kB
   • domain-search.18ad33aac6c34ab49211.jpg98 kB
   • SPS2026-Award.png23 kB
   • SPS2024-Award-platin.png20 kB

   WSG 2.9: Optimize media to reduce resource use
2. Lazy-load below-the-fold mediasave ~0.071 g/visit (787 kB)High impact · quick fix

   17 below-the-fold images/iframes (1.57 MB) download immediately for every visitor.

   Add loading="lazy" to below-fold img and iframe elements (and keep it off the LCP image). Browsers then fetch them only when scrolling approaches.

   • Bayerns-Best-50-2026-Hetzner-2.jpg1.49 MB
   • SPS2026-Award.png23 kB
   • SPS2024-Award-platin.png20 kB
   • eco-award-2011.webp18 kB
   • SPS2025-Award.png14 kB

   WSG 2.9: Optimize media to reduce resource use
3. Serve images at the size they displaysave ~0.057 g/visit (625 kB)High impact · quick fix

   2 images are encoded at more than twice the pixels the layout shows, even accounting for this viewport's pixel density.

   Generate multiple sizes and let the browser pick with srcset/sizes; a 4000px original behind a 400px slot spends bandwidth no screen displays.

   • Bayerns-Best-50-2026-Hetzner-2.jpg1.49 MB
   • Hetzner-Experiments_big.webp952 kB

   WSG 2.9: Optimize media to reduce resource use
4. Reduce JavaScript payloadsave ~0.027 g/visit (299 kB)High impact · moderate effort

   13 scripts total 1.20 MB on the wire (3.70 MB decoded). Bundles this size usually carry a lot of unused code.

   Split bundles per route, tree-shake dependencies, and audit with a bundle analyzer or coverage profile. A 25% cut is a conservative target for bundles this size.

   • vendors.js685 kB
   • chatbot-widget-prod.bundle.js253 kB
   • vendors.js192 kB
   • heck.js46 kB
   • app.js7.2 kB

   WSG 3.2: Minify and remove unused codeWSG 3.3: Modularize bandwidth-heavy components
5. Optimize web fontssave ~0.020 g/visit (217 kB)Medium impact · quick fix

   7 font files total 621 kB.

   Subset fonts to used glyphs, prefer one variable font over multiple weights, serve WOFF2 only, and consider system fonts for UI text.

   • fa-solid-900.woff2159 kB
   • fa-brands-400.woff2119 kB
   • Inter-Medium.woff2106 kB
   • Inter-SemiBold.woff2106 kB
   • Inter-Regular.woff299 kB

   WSG 2.11: Use optimized web typography
6. Upgrade compression beyond gzipsave ~0.015 g/visit (168 kB)Advisory · quick fix

   1.12 MB of text ships gzip-compressed; Brotli or Zstandard would cut roughly another 15-20%, and browsers without them fall back to gzip automatically.

   Serve precompressed Brotli for static text assets (highest level, compressed at build time) and enable Brotli or zstd for dynamic responses; keep gzip only as the fallback.

   • vendors.js685 kB
   • vendors.js192 kB
   • app.css57 kB
   • vendors.css54 kB
   • heck.js46 kB

   WSG 4.3: Reduce data transfer with compression
7. Set a page-weight budgetAdvisory · moderate effort

   At 4.66 MB per view this page rates F. The findings above list where the weight is.

   Agree a transfer budget (e.g. under 975 kB reaches a B), enforce it in CI, and re-scan after each change to hold the line.

   WSG 3.1: Set goals based on performance and energy impact
8. Remove the entry redirectAdvisory · quick fix

   The address that was scanned goes through 1 redirect before the document is served, ending at https://www.hetzner.com/. Every hop is a full round trip on a connection that has not warmed up yet.

   Point links, sitemaps and canonical tags at the final address, and make the host redirect in one hop rather than chaining http to https to www.

   • https://hetzner.com/redirects to https://www.hetzner.com/

   WSG 4.4: Setup necessary error pages and redirection links

Where the bytes are

• Images2.67 MB · 49 req
• JavaScript1.20 MB · 13 req
• Fonts621 kB · 7 req
• CSS151 kB · 6 req
• HTML16 kB · 1 req
• Data (fetch)9.7 kB · 6 req
• Other102 B · 3 req