⬛ Draw Shapes on PDF
Add transparent rectangles, ellipses, lines, arrows, triangles, and stars to any PDF. See-through by default with full control over transparency, color, and stroke.
Select or drop your PDF file here
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How to Draw Transparent Shapes on a PDF
Upload PDF
Drop your PDF into the box above or click to browse.
Draw & Adjust Transparency
Pick a shape, drag on the page, then use the Transparency slider to make it see-through.
Apply & Download
Click "Apply & Download" and your PDF with transparent shapes saves instantly.
Frequently Asked Questions
Transparent shapes let you see the PDF content underneath — perfect for annotating, highlighting areas, and marking up documents. The default is 50% transparency, which is a good balance between visibility and see-through-ness. Drag the slider to 0% for solid shapes, or up to 100% for fully transparent (only the stroke shows).
Yes. Click the shape to select it, then drag the Transparency slider — the shape updates in real time. You can see the change on the preview instantly.
0% transparency = solid shape (fully opaque). 50% transparency = you can see through it halfway. 100% transparency = completely see-through, only the outline/stroke is visible. For most annotation, 30–60% works best.
Yes — the transparency slider applies to the entire shape (both the fill color and the stroke). If you want a solid outline with a transparent fill, set transparency to ~50% and choose a fill color that looks good at that level.
Yes. The transparency is embedded using PDF's native graphics state parameters, which are supported by every modern PDF reader — Adobe Acrobat, Foxit, macOS Preview, Chrome's built-in viewer, and mobile apps.
No. Everything — preview rendering and shape embedding — happens in your browser using pdf.js and pdf-lib. Your file never leaves your device.