Render Dynamic Image API

Open-Time Rendering Platform

Dynamic images for email, generated at open-time

Personalised creative rendered in real-time with signed URLs. Email-safe delivery with no JavaScript, covering vouchers, countdown GIFs, weather cards, calendar actions, and custom image compositions.

Rendered creative panel example

How It Works

One flow for marketers and developers

1. Choose a template

Start from Voucher, Countdown, Weather, Calendar, or Image Composer.

2. Pass campaign data

Use URL params or JSON blocks to inject text, dates, styles, and context.

3. Serve in email or web

Deliver via signed URLs for controlled access and open-time personalisation.

Data source Render API Dynamic image output

Product Pillars

Packaged for campaign outcomes

Personalised Creative

Voucher + composer modules for personalised offer and branded content generation.

  • Unique voucher displays
  • Loyalty and CRM message panels
  • Regionalised creative variants
View examples

Urgency & Timers

Countdown rendering built for launch windows, flash campaigns, and final-call messaging.

  • Sale deadline countdown GIFs
  • Event launch reminders
  • Always-current campaign timers
View examples

Context Cards

Weather-aware cards that adapt by location and date for relevant messaging.

  • City-specific weather creative
  • Travel and retail context prompts
  • Open-time forecast updates
View examples

Calendar Actions

Single endpoint for Google, Outlook, and ICS actions from one campaign CTA.

  • Cross-client event links
  • Campaign reminders
  • Registration follow-up sends
View examples

Live Examples

Preview what campaigns can render

Voucher preview

Voucher Creative

Unique offer card rendering with dynamic text placement.

Try in Playground
Weather preview

Weather Card

Forecast-led creative for travel and location-specific sends.

Try in Playground
Composer preview

Image Composer

Custom multi-block layouts built directly from campaign data.

Try in Playground

Integrations

Fits into modern marketing stacks

ESP Friendly

Designed for SFMC, Braze, Iterable, Adobe Campaign, and similar email platforms.

Email-Safe Delivery

No JavaScript in-message. Standard image delivery patterns only.

Signed Control Layer

Client signatures and timestamps keep rendering access constrained by design.

Security & Control

Trust surfaced clearly

Signed URL model

Client ID + timestamp + signature guard endpoints against unauthorised use.

Operational controls

Designed for allowlists, rate limiting, and focused usage logging.

View Security Details

Outcomes

Built to move campaigns faster

Reduce manual versioning

Generate dynamic variants at render time instead of exporting static creative sets.

Increase open-time relevance

Keep creative aligned to timing, location, and current campaign state.

Launch faster

Move from idea to live creative with URL-based configuration and predictable templates.

Lower campaign ops overhead

Reuse modules across teams while retaining control through signed delivery.

Credibility

Product-grade, not a one-off script

Built for email teams

Focused on real campaign workflows and practical deployment constraints.

Transparent roadmap

Feature, use-case, pricing, and security pages are publicly documented.

Support-ready

Access requests route directly to onboarding and account provisioning workflows.

Start Now

Generate your first signed image URL in 5 minutes