Question 1

Is PDF Markup Tool free?

Accepted Answer

Yes. The core tool is completely free with no page limits, no daily task caps, and no account required.

Question 2

Do I need to install anything?

Accepted Answer

No. PDF Markup Tool runs entirely in your browser on Windows, Mac, iPad, and Android without any install or extension.

Question 3

Are my PDFs uploaded to your servers?

Accepted Answer

Not for the free local mode. Your files are processed in your browser and never leave your device. A Pro account adds optional cloud storage if you want persistent access across devices.

Question 4

What can I do with the PDF markup tool?

Accepted Answer

You can highlight, comment, draw freehand, add text, measure lengths and areas, add shapes (lines, polygons, rectangles), and export a flattened PDF with all markups embedded.

Question 5

Does it work on mobile and tablet?

Accepted Answer

Yes. PDF Markup Tool works on iPad and Android tablets in Safari, Chrome, and Firefox. Touch input is supported for drawing and zooming.

Question 6

What is the difference between PDF markup and PDF annotation?

Accepted Answer

The terms are often used interchangeably. In AEC and construction contexts, 'markup' typically refers to redlining drawings -- adding comments, measurements, and revision marks for review. 'Annotation' is broader and includes comments in any document type. PDF Markup Tool covers both.

PDF markup software for AEC