Tools for people who live on paid media

Build UTM links, check campaign URLs and do the ROAS and margin math. No sign-up, nothing is uploaded, and the code is open.

Your data never leaves your browser

All tools (14)

Project

Free, no sign-up

Open it, use it, close it. We do not ask for an email or create an account.

Private by design

The math runs in your browser. The page is not even allowed to talk to third-party servers.

Open source (MIT)

Read the formula, fix a bug or build a new tool on GitHub.