anywhere
Drop it. Mark it. Done.
Open a PDF.
Mark it up right there.
No installation required. Drop in a PDF and start marking up, measuring, commenting, and sharing in seconds.
More than markup.
Keep every review moving.
Keep comments tied to the drawing, track what is resolved, and confirm approvals in one review.
Share one link.
Keep one review.
No more sending PDFs back and forth. Comments and updates from every reviewer return to the same workspace.
Every review detail.
One shareable PDF.
Bring comments, revision notes, approvals, and other review details together, then export everything as a PDF ready to share.
Professional reviews.
One connected workflow.
Keep reviews moving with Auto Sync, organized comments, due dates, statuses, and PDF / XLSX comment exports. Even complex reviews stay in one browser-based workflow.
Auto Sync
Keep shared review updates synchronized automatically.
Organize
Keep comments, due dates, and response statuses together.
Export
Export comments as PDF and XLSX lists.
Keep reviews
moving.
No installation or complicated setup. Open a PDF, mark what matters, and share it as-is. Comet keeps every review moving.
Open instantly
Open a PDF in your browser without installation or complicated setup.
Communicate clearly
Add intuitive marks and comments directly where they matter.
Share as you go
Send one link and keep the review moving without changing tools.
Ready to review
faster?
Built for drawing review
Comet is a browser-based PDF drawing review tool for architecture, engineering, construction, and design workflows. Mark up drawings, measure distances and areas, compare revisions, count pins, and share feedback directly in your browser.