Design with AI.
Render with an API.
Scale without limits.

RenderStack lets you design image templates in a visual drag-and-drop editor, mark any element as dynamic, then call a REST API with your custom data to generate unique images on demand. Send a POST request with JSON overrides for text, images, colors, and visibility — and get back a pixel-perfect PNG, JPEG, or PDF. No browser or canvas runtime needed on your end. See our Getting Started guide and cURL & API guide for detailed instructions.

Yes. Design your OG image template once in the visual editor, then generate unique social cards per page by calling the API or embedding a GET URL directly in your meta tags. RenderStack supports dynamic text, images, QR codes, and conditional visibility — so every page gets a unique, on-brand social preview without manual design work. Learn how with our Dynamic Image URLs guide.

RenderStack is built API-first for developers who need more than basic image stamping. Unlike alternatives, it includes auto-layout containers that reflow content automatically, fallback chains for missing data, repeater elements for variable-count items, and conditional visibility rules — all handled server-side. You design visually but render programmatically with full deterministic control. See Template Editor and Rendering docs for details.

Design your certificate or invoice layout in the RenderStack visual editor, mark fields like name, date, amount, and QR code as dynamic layers, then call the render API with each recipient's data. RenderStack outputs PNG, JPEG, or multi-page PDF. Repeater elements handle line items, and auto-layout containers reflow content when item counts change. See our Rendering guide for output format details.

Absolutely. RenderStack provides embeddable GET URLs that you can paste directly into any HTML img tag — no server-side code required. Use the built-in URL Builder to construct the URL visually, set your overrides via query parameters (dot-notation supported), and embed the image URL in Webflow, WordPress, email templates, or any platform that supports HTML. GET API keys are scoped for safe client-side use.

RenderStack's GET endpoint lets you render images via a URL with query parameters. Add your template slug, a GET-scoped API key, and layer overrides using dot-notation (e.g., title.text=Hello&title.fill=%23ff0000) directly in an img src attribute. Built-in caching, rate limiting, and allowed-host restrictions keep it secure. The URL Builder tool lets you construct and preview these URLs without writing any code. See also the cURL & API guide for error handling.

Yes. RenderStack's REST API works with any language, framework, or AI-assisted coding tool. Whether you're building with Cursor, Bolt, Lovable, or Replit, you just make an HTTP POST with JSON data and get back an image or PDF. The API is straightforward enough that AI coding assistants can generate the integration code for you from the documentation alone. Check our cURL & API guide for examples.

RenderStack has built-in fallback chains. For each dynamic layer, you define an ordered strategy: try API-provided data first, fall back to initials, then a default value, or hide the element entirely. Auto-layout containers automatically reflow remaining elements when something hides. This means zero client-side logic for handling edge cases — the template handles it all. Learn more in the Layers guide.

Yes — repeater elements let you render 1 to N items from a single template. Define a repeater container in the editor, design one item layout, and send an array of data via the API. RenderStack clones the item for each entry, positions them according to your layout rules, and handles overflow automatically. One template covers any count. See the Template Editor guide for details.

Yes. Upload TTF or OTF font files through the asset manager, and they become available in both the visual editor and the server-side rendering engine. Your generated images and PDFs will use your exact brand typography with full control over weight, size, spacing, and alignment. See the Custom Fonts guide for setup instructions.

Add a QR code element in the template editor and mark it as dynamic. When you call the API, pass the URL or data string as an override, and RenderStack generates and embeds the QR code at render time. You can customize the size, position, and error correction level. If the QR data is invalid, the render continues with a warning instead of failing. Refer to the Template Editor guide for QR code configuration.

Yes. Design a product card template with placeholders for product name, price, image, badge, and description. Mark each as dynamic, then call the API with product data from your catalog to generate consistent, on-brand product images at scale. Auto-layout containers handle variable text lengths, and fallback chains gracefully handle missing product photos.

Puppeteer and headless Chrome require you to maintain browser infrastructure, handle memory leaks, manage timeouts, and debug CSS rendering inconsistencies. RenderStack eliminates all of that — you design visually in a dedicated editor, and the server-side rendering engine produces deterministic output every time without a browser. It's faster, more reliable, and requires zero DevOps overhead.

Yes. RenderStack's AI Template Creation feature lets you upload a PNG, JPG, WebP, or PDF file. AI vision analyzes the layout, detects text blocks, image regions, shapes, and spatial relationships, then generates an editable template with properly positioned elements. You refine it in the visual editor and it's immediately ready for API rendering.

RenderStack renders to PNG (best for graphics with transparency), JPEG (best for photos, configurable quality 1-100), and PDF (including multi-page documents with up to 50 pages per render). You can set default output preferences globally or override the format per render request. See our Rendering guide for format details.

RenderStack supports multi-tenancy with role-based access control. Create an organization, invite team members as owners, admins, users, or viewers — each role has specific permissions for templates, API keys, assets, and settings. All data is isolated per organization, and the activity log tracks every action by every member for full auditability. See the Organization guide for details.

Yes. Configure your AWS S3 credentials once in settings (encrypted with AES-256-GCM at rest), and toggle S3 upload per render request. Rendered images are automatically uploaded to your bucket after generation. The upload is non-blocking — if S3 fails, the render still succeeds and you still get your image. Learn more in the AWS S3 Integration guide.

RenderStack provides four API key types — master, project, read-only, and GET — each with scoped permissions so you grant only the access needed. Keys can be rotated at any time, and GET keys support allowed-host restrictions to limit which domains, wildcard subdomains, IP addresses, and CIDR ranges can use them. Unauthorized origins are rejected before any rendering occurs. See the API Keys guide for details.

Yes. All data in transit is protected by TLS/SSL encryption. Stored credentials such as AWS S3 keys are encrypted at rest using AES-256-GCM. Database connections are encrypted, and session handling follows secure best practices. Your templates, assets, and rendered images are stored in isolated, secure cloud storage.

RenderStack supports four role levels — owner, admin, user, and viewer — each with granular permissions governing access to templates, API keys, assets, settings, and billing. All data is isolated at the organization level, so there is no cross-tenant access. RBAC is enforced on both the API and UI layers. See the Organization guide for role details.

Templates, assets, and rendered images are stored in secure cloud storage with organization-level isolation. No data is shared across tenants. For full data sovereignty, you can configure automatic upload of rendered images to your own AWS S3 bucket — giving you complete control over where your outputs reside. See the AWS S3 Integration guide for setup.

Yes. The Allowed Hosts feature for GET API keys lets you specify exactly which domains, wildcard subdomains (e.g., *.example.com), IP addresses, and CIDR ranges are permitted to use each key. Requests from unauthorized origins are rejected with a clear error, preventing unauthorized usage of your rendering quota. See the Allowed Hosts guide for configuration.

Yes. Comprehensive activity logs track every action across the platform — including renders, API key creation and usage, member changes, template edits, and settings updates. Logs are filterable by user, category, level, and date range, and can be exported for compliance and auditing purposes.

RenderStack handles errors gracefully. Fallback chains provide ordered strategies for missing data, and non-blocking rendering ensures a broken image URL or invalid QR code won't crash the entire render. You always receive output along with structured warnings in response headers (X-Render-Warnings) describing exactly what was skipped or substituted. See the cURL & API guide for error response details.

Yes. RenderStack offers a free trial so you can design templates, test the API, and generate renders without a credit card. When you're ready to scale, choose from flexible paid plans with usage-based pricing and optional overage allowances. Visit the Pricing page to see current plan details.