Free Watt toolA browser PDF tool built for real markup.
Open, mark up, measure, edit and reorganize PDFs in the browser. PDFWatt includes construction-friendly tools such as highlights, arrows, revision clouds, callouts, stamps, signatures, length and area measurement, and page operations.
What it does
PDFWatt in one screen.
- Professional markup tools: highlights, arrows, clouds, callouts.
- Length and area measurement with scale calibration.
- Text editing and white-out tools.
- Insert, extract, delete and reorder pages.
- Stamps, signatures, tables, pictures and charts.
Where your file lives
PDFWatt is built to work on the file in your browser on this device. If you need a written guarantee that covers every feature you plan to use — including OCR or any AI-assisted step — ask us and we will confirm the current behavior feature by feature rather than publish a blanket claim.
A real screen from the tool, with a sample file
Free · no account
Open PDFWatt and get on with it.
It is free because it should be. If you want the connected platform behind it — estimating, bidding, jobs, field and time on one project — start with the platform overview.