Nudge Blocks · email render service
Small JSON or query-string configs turn into hosted GIF / PNG / JPG that Nudge's AI marketer drops straight into emails as plain <img>. Every block exists because Gmail and Outlook strip CSS animation — pixels are the only thing that works everywhere.
Available blocks
Each block is one route. Click into a card for the full integration brief — params, samples, embed snippet, email-client gotchas.
A right-to-left scrolling offer bar — "FREE SHIPPING · USE CODE SAVE20 · ENDS SUNDAY". Deterministic, so identical configs reuse the same hosted GIF across a campaign.
A ticking days / hours / minutes / seconds GIF to a target moment. Time-relative — every email open re-hits the endpoint for the current value, so the URL is the image.
app/blocks/html_image/docs/blocks/html-to-image.md
Headless-Chromium renderer (Playwright) for layouts CSS can't express in email — anything from a styled receipt to a chart. Caller HTML is untrusted, so the sandbox / egress story is the first thing the build will lock down. Heavier deps than the Pillow blocks, so it builds from its own Dockerfile.
Shared architecture
Email clients are the whole reason this service exists. Gmail, Outlook desktop, and most major clients strip <style> blocks, ignore @keyframes, don't honor <marquee>, and drop most modern CSS. The two things that work almost everywhere are an animated GIF and a static raster image.
Every block has the same shape: a small JSON or query-string config in, hosted image URL out. The email gets a plain <img>.
Deterministic blocks (announcement bar, html-image) hash the config and reuse the same GIF across a blast. The countdown is per-open and never cached.
Recipients don't have our fonts, so we render with bundled .ttfs. There is no "use the system font" — only glyphs present in the chosen font render.