Kanzonas

Free PDF markup, measuring and editing

For people who mark up and measure drawings and plans: estimators, engineers, architects and reviewers. Open source, no account, no telemetry, no watermarks.

Download for Windows

Newest version from GitHub releases

Linux (AppImage) · Portable for Windows (zip) · All releases · Source code on GitHub

What it does

Measure

Calibrated length, area, perimeter, volume, count, angle and radius. Scales read from title blocks.

Mark up and review

Highlights, comments, callouts, shapes, revision clouds, stamps with your name and the date, and a tool chest.

Compare revisions

Word by word, or laid over each other, with the changes clouded for you.

Edit the PDF itself

Change the page's own text (paragraphs rewrap), pictures and shapes. Add links to anything.

Forms, signatures, redaction

Fillable forms, digital signatures, true redaction and OCR for scanned pages.

Export

To Word, Excel, PowerPoint and AutoCAD DXF.

Good to know

  • Free and open source (AGPL-3.0)
  • Windows, and Linux on 64-bit x86 PCs
  • Runs offline; nothing is uploaded
  • Portable: runs from a USB stick
  • Tells you when an update is out
  • No macOS version