# RenderStack

> RenderStack is an AI-powered image and document generation platform. Design with AI, render with an API, and scale without limits. Create templates from natural language descriptions, uploaded images, or a visual editor — then generate personalized images and PDFs at scale via REST API or embeddable GET URLs.

## About

RenderStack combines AI-powered template creation with a production-grade rendering engine. Describe what you want in plain English and AI builds it. Upload an existing design and AI recreates it as an editable template. Or design pixel-perfect templates in a visual drag-and-drop editor. Mark elements as dynamic and render unique variations via API — without headless browsers, manual design work, or CSS debugging.

## Documentation

- [About RenderStack](/content/about.md): Platform overview, target audience, and key differentiators
- [Features](/content/features.md): Complete feature list with descriptions
- [FAQ](/content/faq.md): Frequently asked questions covering use cases, integrations, and comparisons
- [Pricing](/content/pricing.md): Plans, usage limits, and billing details
- [Pricing Page](/pricing): Rendered pricing page with plans and billing details
- [API Reference](/content/api-reference.md): REST API endpoints for rendering images and PDFs
- [Public Help Docs](/docs): Public documentation and help articles available at /docs/:slug
- [Welcome to RenderStack](/docs/welcome): Platform overview, first steps, and key concepts
- [Getting Started with Your Organization](/docs/getting-started-org): Organization setup, member roles, template elements, and onboarding
- [Quick Start: Your First Render](/docs/quick-start-render): Step-by-step guide to creating a template and calling the render API
- [Template Editor Guide](/docs/template-editor): Editor layout, element types, pinning, element conversion, and keyboard shortcuts
- [Using Dynamic Layers](/docs/dynamic-layers): API names, visibility modes, auto-hide, and layer management
- [Render API Reference](/docs/render-api): POST /api/v1/renders/sync, /api/v1/renders/json, GET /api/v1/render — full parameter reference
- [Output Formats & Quality](/docs/output-formats): PNG, JPEG, PDF — format selection, quality settings, and transparency
- [Rich Text & Inline Styling](/docs/rich-text-styling): textRuns, richText shorthand, bold, italic, color, superscript, subscript, font mixing
- [Repeater Elements](/docs/repeater-elements): Variable-length lists, grids, and tables via API arrays
- [Smart Cover: AI Image Positioning](/docs/smart-cover): AI-based focal crop, subject detection, and anchor points
- [Template Export & Import](/docs/template-export-import): JSON-based template portability across organizations
- [API Keys Overview](/docs/api-keys-overview): Master, project, read-only, and GET key types with permission scopes
- [URL Builder Tool](/docs/url-builder): Interactive tool to build and test dynamic image GET URLs
- [Rate Limits](/docs/rate-limits): Per-plan rate limits, 429 handling, and retry best practices
- [Webhook Notifications](/docs/webhooks): HMAC-signed event payloads, available events, retry policy
- [Image Caching & Performance](/docs/image-caching-performance): Cache TTL, CDN headers, cache purge API
- [Template Integration Guide (for Developers)](/docs/template-integration-guide): Complete layer schema reference, element types, render API, repeater data, auto-visibility, pinning — for AI agents and developer integrations
- [Use Cases](/use-cases): Real-world use cases for API-first image and PDF generation
- [Solutions](/solutions): Solutions for eliminating manual image creation and shipping image features faster
- [Compare](/compare): Side-by-side comparisons with Bannerbear, Placid, Puppeteer, and other tools
- [Integrations](/integrations): Step-by-step recipes for Zapier, Webflow, Stripe, AWS S3, and more
- [Live Demos](/demo): Interactive demos for social cards, event badges, product cards, and report covers — no signup required
- [Free Tools](/tools): Free developer tools — OG image preview, API request builder, image size guide
- [Examples Gallery](/examples): Real-world pipeline examples for OG cards, e-commerce, certificates, invoices, and more
- [Resource Hub: Developers](/resources/developers): Curated developer guides, API docs, and recipes
- [Resource Hub: Marketers](/resources/marketers): Curated marketer workflows, no-code tools, and integrations
- [Resource Hub: Platform Teams](/resources/platform-teams): Multi-tenant guides, security docs, and infrastructure resources
- [AI Features](/features/ai): AI-powered template creation — natural language, vision import, Smart Cover, AI assistant
- [Rich Text Features](/features/rich-text): Rich text and inline styling capabilities — bold, italic, color, superscript, subscript, font mixing
- [Repeater Elements](/docs/repeater-elements): Variable-length lists, grids, and tables via API arrays
- [AI Info Page](/ai-info): Structured information for AI models and web crawlers
- [Privacy Policy](/privacy): Privacy policy
- [Terms & Conditions](/terms): Terms and conditions
- [Copyright](/copyright): Copyright notice

## Key Capabilities

### AI-Powered Creation
- Natural language template creation: Describe what you want in plain English and AI builds an editable template
- AI Vision Import: Upload a PNG, JPG, WebP, or PDF and AI analyzes the layout, detects elements, and recreates it as an editable template
- Smart Cover: AI-powered focal crop that detects faces/subjects and positions them at designer-specified anchor points
- Built-in AI assistant for natural-language platform queries with source citations

### Template Design & Rendering
- Visual template editor with drag-and-drop canvas (text, images, shapes, SVGs, QR codes) and element type conversion
- Responsive percentage reference dimension: percentage-based positioning and sizing can resolve against artboard width or height (W/H toggle per property), enabling uniform spacing across different aspect ratios — width-based reference is the default
- REST API rendering (sync and async) with PNG, JPEG, and multi-page PDF output
- Embeddable GET URLs for no-code image generation via HTML img tags
- Auto-layout containers with automatic reflow on element visibility changes
- Fallback chains for missing data (API data → initials → default → hide)
- Repeater elements for variable-count content (1 to N items per template) — available on Business and Enterprise plans
- Conditional visibility rules and group logic
- Auto-hide visibility mode: layers set to "Auto" are completely hidden (no placeholder) when their content is empty — ideal for optional elements like secondary speakers or conditional badges
- Custom font support (TTF, OTF, WOFF, WOFF2) in editor and server-side rendering with automatic format conversion

### Rich Text & Inline Styling
- Rich text styling (textRuns) for inline bold, italic, underline, strikethrough, color, highlight, superscript, subscript, and font mixing within a single text frame
- Three input methods: plain text, richText Markdown shorthand, and structured textRuns arrays
- Key use cases: pharmaceutical labels, legal disclosures, scientific notation, marketing materials

### Performance & Caching
- Built-in server-side image caching for GET render endpoint with automatic cache invalidation on template edits
- Configurable cache TTL per plan with Enterprise self-service cache controls
- CDN-compatible cache headers (Cache-Control, s-maxage, stale-while-revalidate) for Cloudflare and CloudFront
- Cache purge API: individual entry, per-template, or full organization purge
- Cache usage analytics and hit rate metrics on the Billing page

### Platform & Infrastructure
- Multi-tenancy with role-based access control (owner, admin, user, viewer)
- API key management with four permission levels (master, project, read-only, GET)
- AWS S3 auto-upload for rendered outputs
- Template export/import (JSON-based) for cross-organization template portability with automatic asset URL resolution
- Automatic thumbnail generation on template create, save, import, and duplicate — with manual regeneration option
- Showcase system for curating templates displayed on the public landing page
- Outbound webhooks with HMAC-SHA256 signed payloads and automatic retries
- Email notifications with per-user preferences and one-click unsubscribe
- Native Slack integration for platform admin notifications via Incoming Webhooks with per-event toggles and Block Kit formatting

## Use Cases

- Dynamic Open Graph and social media card generation
- Personalized certificates and award images at scale
- E-commerce product image generation from catalog data
- Invoice and multi-page PDF document generation
- Event badges and speaker cards with variable attendee counts
- Email marketing images with personalized content
- Real estate listing images from property data
- Dynamic banner ads with A/B testing variations
- Pharmaceutical product labels and drug information images with superscript dosage notations
- Legal and compliance disclosure images with footnote markers and mixed formatting
- Nutraceutical supplement cards with trademark symbols and regulatory formatting

## Affiliate Program

RenderStack offers an affiliate program at ref.renderstack.io/register. Users can earn commissions by referring customers who subscribe to paid plans. Tracking is handled automatically via unique referral links. The affiliate dashboard provides real-time referral tracking, earnings overviews, and marketing resources.

## Target Audience

- Backend and full-stack developers building automated image pipelines
- No-code builders using Webflow, WordPress, or similar platforms
- Vibe coders using AI-assisted tools (Cursor, Bolt, Lovable, Replit)
- Marketing teams needing programmatic image generation
- SaaS platforms embedding image generation as a feature

## Usage Guidelines

- Attribution: "Powered by RenderStack" or "RenderStack (renderstack.io)"
- Educational and commercial use encouraged
- API documentation available after sign-up