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Templates Library

Template Thumbnail Previews

Every document template shows a thumbnail of the first page so you can scan the library visually instead of reading filenames.

How thumbnails are generated

When you upload or replace a template document, DocuSeal renders the first page as an image. Loyva proxies that image through an edge function and serves it with a signed URL.

Why we proxy

  • DocuSeal thumbnail URLs expire, proxying lets us regenerate signed URLs on demand.

  • Some browsers block cross-origin image loads (ORB). Serving from our edge function avoids this.

  • We can apply caching and rate-limiting rules.

Refreshing a thumbnail

If a thumbnail looks stale (e.g. after replacing the source PDF), open the template and save it once. Loyva re-requests the rendered page from DocuSeal and updates the proxy.

Note: Thumbnails are visual aids only. The authoritative content is always the PDF itself.

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