> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://support.pdfgeneratorapi.com/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Release Notes 2.219.0 (17.09.2025)

#### Streamline Document Review with the 'Viewer' Output
You can now use `viewer` as an `output` option when generating documents. This option returns a URL to our interactive document viewer, where your users can view the PDF, add a simple signature, and download the final document. This is a powerful addition that streamlines simple approval and signing workflows directly through the API, without requiring you to build your own front-end viewer.

Learn how to implement it in the [Document Generation API documentation](https://docs.pdfgeneratorapi.com/v4#tag/Documents/operation/generateDocument).

![PDF Viewer with signature option](https://storage.crisp.chat/users/helpdesk/website/-/1/1/e/0/11e0e518fc48ce00/pdf-viewer_1aeiotj.png)


#### Understand Template Structure with JSON Schema

We've launched a new endpoint that returns the complete JSON schema for our templates. This feature gives you a clear, programmatic blueprint of the template structure, **simplifying the process of building and validating dynamic integrations** with the PDF Generator API.

Ready to build more robust integrations? Check out [Template Schema API documentation](https://docs.pdfgeneratorapi.com/v4#tag/Templates/operation/getTemplateSchema).

### Internal updates
Release 2.219.0 introduces internal updates, refactoring, and code improvements that are not directly visible to end-users.