One price. No subscription.
Buy Cella PDF once and it's yours, with every feature and every 1.x update included.
- For Mac, Windows and Linux
- Every 1.x update included
- Every feature, nothing held back
- 14-day free trial first, no sign-up
Try it free
Download Cella PDF and open it. Use every feature free for 14 days.
Buy in the app
In Cella PDF, choose Buy Cella PDF and check out. Your license key arrives by email.
Then choose Enter License Key and paste it.
$149 once
No subscription. Updates included.
14-day free trial
No sign-up, no card.
Mac, Windows, Linux
The same app everywhere.
Your files stay yours
No account, no cloud.
Add live review when you need it
Cella PDF Server shares everyone's markups as they're made. Run it yourself free, or have us host it from $49 a month.
Questions
How does the free trial work?
The 14-day trial starts the first time you open Cella PDF. Everything works. No sign-up, no card.
What happens when the trial ends?
Cella PDF becomes a free viewer: open, search and print drawings and read every markup. Marking up and measuring need a license key.
Who needs a license?
Anyone who marks up or measures. Everyone else on the project can open, search and print drawings and read every markup free.
How do I move my license to a new computer?
On the old computer, open Cella PDF License and choose Deactivate This Device. Then enter your key on the new one.
Does it need an internet connection?
Only to activate your key and re-check it now and then. Cella PDF keeps working offline for up to 30 days.
Are my drawings uploaded anywhere?
No. There's no account and no cloud. Your drawings stay on your computer and your network.
Does Cella PDF work with AI assistants?
Yes. Turn it on in Settings, under AI Assistants, and an assistant app such as Claude Desktop, Claude Code, VS Code or Cursor can read your open drawings, markups, quantities and sheet text. It's off until you turn it on, and it's included with Cella PDF.
Can an AI assistant change my drawings?
Only if you choose Read and propose changes, and only by asking. Each change shows up with Allow and Deny, nothing happens until you click Allow, and an allowed change is one step of Undo.