Html to image design delivery

HTML-to-Image Design Delivery

Use this skill when the user asks for a visual design deliverable (magazine cover, poster, social graphic, flyer, quote card, announcement visual) and image generation tools (FAL, Higgsfield, etc.) are unavailable, unconfigured, or inappropriate for the task.

The technique: build the design as a self-contained HTML page, then screenshot it with Playwright to deliver a PNG image to the user.

When To Use

• User sends a photo (selfie, portrait, product shot) and asks "make this a magazine cover" / "turn this into a poster" / "make it look like [Forbes/Time/Vogue/etc.]"
• Any fixed-size editorial layout with text overlays on a photo
• Branded quote cards, announcements, social media graphics
• Fixed-size banners where HTML precision is easier than prompt-only image gen
• Image gen is not configured (FAL_KEY missing, no Higgsfield account, etc.)

When NOT To Use

• The user wants a generic text-to-image (no specific brand layout) — let them know image gen is unconfigured first
• The deliverable needs to be interactive or animated (use plain HTML delivery instead)
• A video or reel is needed (use branded-reel-pipeline or short-form-video-production)

The Workflow

1. Build the HTML artifact

Create a self-contained HTML file with:

• User photo embedded as base64 data URI — encode the image first:

  import base64
  with open('photo.jpg', 'rb') as f:
      b64 = base64.b64encode(f.read()).decode()
  

  Then in HTML: <img src="data:image/jpeg;base64,{b64}">

• CSS overlays and gradients — use position: absolute overlay divs with background gradients (e.g., linear-gradient(180deg, rgba(0,0,0,0.55) 0%, ... rgba(0,0,0,0.4) 100%)) so text stays readable over the photo.

• Typographic treatment — use Google Fonts for brand-relevant typography (Playfair Display for editorial/Forbes-style serif, Inter for modern sans). Import via @import url(...) in CSS.

• Fixed dimensions — wrap everything in a container div with exact pixel dimensions matching the intended output (e.g., width: 720px; height: 1280px for portrait magazine covers).

• All visual elements as CSS — mastheads, accent bars, cover lines, barcodes, diamonds, price tags, taglines. No images needed except the user photo.

2. Serve locally (required for base64 images)

Browser security blocks file:// protocol from loading base64 images in some environments. Always serve via HTTP:

python3 -m http.server <port> --bind 127.0.0.1

Run this in the directory containing your HTML file.

3. Screenshot with Playwright

Install Playwright in a temp directory:

mkdir -p /tmp/screenshot && cd /tmp/screenshot
npm init -y && npm install playwright

Create a screenshot script:

const { chromium } = require('playwright');
(async () => {
  const b = await chromium.launch();
  const p = await b.newPage({ viewport: { width: 720, height: 1280 } });
  await p.goto('http://127.0.0.1:<port>/<file>.html', {
    waitUntil: 'networkidle',
    timeout: 15000
  });
  await p.screenshot({ path: '/output/path.png', fullPage: true });
  await b.close();
  console.log('DONE');
})();

Run it: node screenshot.js

4. Deliver the image

Send the resulting PNG to the user via MEDIA:/absolute/path/to/output.png.

5. Clean up

• Kill the HTTP server
• Remove temp npm install directory

Magazine Cover Templates

Forbes-style layout

• Masthead: Playfair Display, 900 weight, ~72px, letter-spacing 14px, white with text-shadow
• Subhead: "The Creator Economy Issue" or similar, Inter 300, 11px, letter-spacing 6px
• Red accent bar: 80px wide, 2px height, #e60000
• Diamond shape: 14x14px rotated 45deg with 2px white border
• Top cover line: "EXCLUSIVE · [MONTH YEAR]" in small caps
• Main headline: Inter 900, 58px, white, -1px letter-spacing — punchy, aspirational
• Subheadline: Inter 300, 22px, semi-transparent white
• Cover lines: 3-4 bullet-style lines on bottom-left, white, ~16px
• Barcode area: repeating-linear-gradient barcode, "$7.99 US/CAN" price tag
• Tagline bottom-left: "forbes.com · @handle"

General layout rules

• 720x1280px portrait (standard phone-screen portrait ratio)
• Gradient overlay: dark at top (for logo visibility) → semi-transparent middle → dark at bottom (for text readability)
• Center author photo as main cover image
• Light text on the dark overlay
• Use box-shadow on the cover itself for a physical magazine feel

Pitfalls

• Always serve via HTTP — file:// with base64 images causes blank renders in headless browsers.
• Match viewport to output — set { viewport: { width, height } } to the exact pixel dimensions of the intended output.
• Use waitUntil: 'networkidle' — ensures Google Fonts and images fully load before the screenshot fires.
• Check the Playwright install path — Playwright chromium needs to be downloaded first (npx playwright install chromium). If that's already done in a system cache, npm install playwright picks it up automatically.
• Clean up after yourself — HTTP server and temp npm installs consume disk space.
• Let the user know image gen wasn't available and you used HTML→screenshot instead, so they understand why it's not a "real" magazine cover.
• Don't use too many Google Fonts — each import adds load time. Stick to 1-2 families max.