DO Digital Opus

PDF Workspace

Local document processing suite

Your documents stay in this browser and are not uploaded. Internet access is required to load the PDF and Markdown libraries.
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Numbers refer to the current position of cards in the grid below (after any reordering).

Drag and drop your PDF files here

Combine multiple files, drag pages into a new order, rotate sheets, or extract a page range.

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Open a PDF to edit & annotate

Add text boxes, highlight content, draw shapes, place stamps or stamp a signature onto pages.

Document Settings

Configure layout for the generated PDF

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Drag & drop images here (PNG, JPG, WEBP)

Watermark Config

Stamp a custom overlay onto every page

50px
30%
45°
#ef4444
centred

Drag the watermark on the preview to move it. Works with mouse, pen and touch.

Upload a PDF to watermark

Page 1 is shown as a live preview; the watermark is applied to every page on export.

Template Forge

Generate printable pattern sheets

20px
30%

Markdown Writing Studio

Author in Markdown, export a real vector PDF

0 words0 min read
Document preview

PDF export uses built-in PDF fonts; characters outside their supported repertoire are replaced with ?. The browser preview can still display them.