WPIntell

Source evidence

Dynamic watermark?

PDF.js Viewer · support · 2026-03-26T06:58:00+00:00

PDF.js Viewer plugin evidence original source source API
complaintsentiment
mediumseverity
0.75relevance
1replies
Evidence linked to opportunitycommercial context

Proof Health

Open evidence

Commercial opportunities need traceable source links before they are treated as build-worthy.

4 / 33 rows with source links

12.1% of this page's analysis has direct source links.

0 build-decision rows missing links

0 rows here require auditable proof before promotion.

29 rows with no attached evidence

0 rows have source counts but still need direct links.

Conversation

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lockyleung unresolved
Is it possible to add dynamic watermark on each page of PDF files? Or, can it be done with other plugins supporting this feature? If not, would you like to add this feature in a coming version? Thank you! This plugin utilizes Mozilla’s PDF.js and Mozilla’s PDF.js does not have a native, “out-of-the-box” feature for dynamic watermarking. There are workarounds that can inject a watermark on all pages, but it’s purely an overlay and does not actually change the PDF. If someone were to download the PDF, there would be no watermark. If you want to add a watermark, you should add it to the PDF itself with a PDF editor application.

Comments

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Thomas McMahon 2026-04-17T02:23:00+00:00

This plugin utilizes Mozilla’s PDF.js and Mozilla’s PDF.js does not have a native, “out-of-the-box” feature for dynamic watermarking. There are workarounds that can inject a watermark on all pages, but it’s purely an overlay and does not actually change the PDF. If someone were to download the PDF, there would be no watermark. If you want to add a watermark, you should add it to the PDF itself with a PDF editor application.