Dynamic post templates
for social media
Design professional templates with image layers, blocks and text. Generate images automatically via a unique URL with parameters.
How it works
From design to dynamic image in three steps
Design your template
Use the visual editor to compose layers: images, text, shapes, labels, and live data modules like weather or JSON feeds.
Mark dynamic fields
Toggle any layer as dynamic and give it a placeholder name. These become URL parameters you can fill at render time.
Use the render URL
Every template gets a unique URL. Pass parameters to swap images, text, and data — get a fresh PNG back instantly.
https://rendro.io/r/my-template?title=Hello+World&img_bg=https://...Returns a dynamically generated PNG image
Everything you need for dynamic images
A complete toolkit for automated, on-brand visual content
Layer-based editor
Stack images, text, shapes, and labels with full control over position, size, rotation, opacity, and z-order.
Instant rendering
Every template gets a unique URL. Pass parameters via query string and receive a server-rendered PNG in milliseconds.
Social media presets
YouTube thumbnails, Instagram, LinkedIn, Twitter/X, Pinterest, Stories — all standard sizes built in.
Live data modules
Add weather, RSS feeds, or JSON data sources that update automatically at render time. No code needed.
API-first approach
Every feature is accessible via URL parameters. Perfect for automation with Zapier, n8n, cURL, or your own scripts.
Image library
Upload and manage your assets. Use images from your library directly in templates — no external hosting needed.
Built for creators, developers, and teams
Content creators
- Auto-generate YouTube thumbnails with episode titles
- Create Instagram posts with dynamic product info
- Consistent social cards with live weather or stats
Developers & DevOps
- Generate OG images for blog posts via API
- Dashboard status images for monitoring
- Webhook-triggered visual notifications
Marketing teams
- On-brand templates anyone can fill via URL
- Batch generate campaign visuals from spreadsheets
- A/B test image variants without a designer
Easy to integrate in your workflows
Use Rendro with any tool, language, or automation platform. Just a URL — works everywhere.