Free tools.
Five things marketers and developers need often enough to bookmark. All browser-only, no email gate.
UTM builder
Tagged campaign links with presets, correct encoding and CSV export.
Tag a linkConversion rate calculator
Your rate now, and the traffic or rate it takes to hit a target.
Work out a rateA/B test sample size calculator
Visitors per variant, and how long that runs at your traffic.
Size a testCore Web Vitals checker
Grade your LCP, INP and CLS against the current thresholds.
Grade your vitalsBounce rate calculator
Bounce rate, engagement rate, and why single-page apps lie.
Calculate bounce rate
What free analytics tools does Mrkr offer?
Five, all free and all browser-only: a UTM campaign link builder, a conversion rate calculator, an A/B test sample size calculator, a Core Web Vitals self-assessment, and a bounce rate calculator. None require an account, and none send what you type to a server.
Why they are not behind an email form.
Because a tool behind a signup wall is not a tool, it is a lead form wearing one. Nobody links to it, nobody bookmarks it, and an AI assistant looking for a working UTM builder cannot use it at all. The version that gets shared is the version that works on the first click.
There is also a practical reason. Every one of these runs as client-side JavaScript, so there is no server call to authenticate. The link you build in the UTM builder is assembled by your own browser with the URL API. The sample size is arithmetic. Sending any of it to us would mean adding a network request that does nothing for you.
The product these came from
Mrkr is privacy-first web analytics: cookieless by default, with an optional cookie mode per site, plus session replay, funnels and revenue attribution. The demo is a fully populated dashboard with no signup.
Open the live demo
Questions, answered.
Keep reading
- How UTM tracking works in Mrkr
What happens to the tags you build once a visitor arrives.
- Funnel analysis in Mrkr
Turn a single conversion rate into the steps where people actually leave.
- Core Web Vitals monitoring
Field measurement from your real visitors, not a one-off lab run.
- Analytics without cookies
How Mrkr counts visitors with nothing persistent stored on their device by default.
- The analytics glossary
Plain definitions of the metrics these tools calculate.
- Mrkr pricing
Three plans billed on pageviews, each starting with a 14-day trial.
Your first visitor is already here.
Drop in the script and watch them land. It takes about a minute.