Signed image URLs

Generate dynamic images from one signed URL

Turn your content and render settings into a signed image URL. Use it in Open Graph metadata, HTML, email, or your application, and HCTI renders the image when it is requested.

Start free Read the docs
  • No separate POST request
  • Renders on demand
  • Dynamic OG images
A create-and-render query signed on the server and placed in markup as a public image URL.

Create-and-render URL

Signed GET

Query

HTML + CSS

Size

1200 × 630

Format

PNG

Signed image URL

https://hcti.io/v1/image/create-and-render/…

Use it in Open Graph metadata, HTML, email, or no-code tools—no separate create request required.

og:image
<img src>
Email HTML
CMS field

Signed URL rendering

Turn render settings into a dynamic image URL

Generate a signed URL from your content and image options. HCTI renders it on demand, so your application does not need to create the image first, handle a response, or store an image ID.

  1. Choose the content

    Start with HTML, a webpage, or an image template, then set the size, format, and render options.

  2. Generate the signed URL

    Pass those options to an official client and receive one URL that renders the image when requested.

  3. Use it as the image source

    Set the URL as og:image, an HTML image source, an email image, or a field in your CMS or automation.

Use cases

Dynamic images for places that expect a URL

Read the create-and-render docs

Open Graph images

Set a signed URL as og:image to generate a unique social preview for each article, product, or landing page.

Email and embeds

Use the signed URL as a standard image source in HTML email, CMS content, and embedded widgets.

Server-rendered pages

Build the image URL while rendering the page instead of waiting for a create request and returned image ID.

Low-code and no-code tools

Use one URL in CMS fields and automation tools that cannot make a separate image API request.

Start with one URL

Generate dynamic images without a separate create request

Create a signed URL from your image options and use it directly in Open Graph metadata, HTML, email, and server-rendered pages.

Start free Read the docs

Related features

More ways to use HTML/CSS to Image

Learn about related options for image and PDF generation, storage, security, and team access.

Open Graph Images

Fresh preview images from page metadata.

Learn more

Batch Images

Multiple images in one request.

Learn more

URL Screenshots

Screenshot any website with one API call.

Learn more

Official API clients

Generate signed image URLs with official clients

Generate signed URLs for Open Graph metadata, HTML, email, or your application in TypeScript, C#/.NET, Python, Ruby, PHP, or Go.

Choose your language for setup instructions and examples. Keep API credentials in your server-side code.

TypeScript

Client docs npm package

C# / .NET

Client docs NuGet package

Python

Client docs PyPI package

Ruby

Client docs Gem

PHP

Client docs Composer package

Go

Client docs Go module

We take pride in creating native clients and integrations—not relying on code generation. All our clients are open source, and contributions are welcome.