Free tools

Tools for growth & product teams.

Small, genuinely useful tools — built by Pug, the open-source product analytics platform. No signup, and everything runs in your browser.

14 tools No signup Runs in your browser Open source

Campaigns & experiments

Plan campaigns, size experiments.

Campaigns

UTM Builder

Build trackable campaign URLs with consistent, lowercased UTM parameters.

Open tool Experiments

A/B Test Calculator

Size a test before you run it, then check statistical significance.

Open tool

Conversion & funnels

Measure conversion, find the drop-off.

Conversion

Conversion Rate Calculator

Turn visitors and conversions into a rate, and plan the traffic for a target.

Open tool Funnels

Funnel Conversion Calculator

See step conversion, drop-off, and overall rate — and find the bottleneck.

Open tool

Retention

Track retention and churn.

Retention

Retention & Churn Calculator

Retention rate, churn, and the customer lifetime it implies.

Open tool Retention

Cohort Retention Visualizer

Paste cohort counts and render the retention curve as a heatmap.

Open tool

Cost & growth

The cost, value, and growth math.

Pricing

Analytics Cost Calculator

Estimate Mixpanel/Amplitude/Segment cost vs. $0 self-hosted Pug.

Open tool Growth

CLV Calculator

Estimate customer lifetime value from ARPU, margin, and churn.

Open tool Growth

CAC Calculator

Acquisition cost, LTV:CAC ratio, and payback period.

Open tool Growth

NPS Calculator

Net Promoter Score from promoter, passive, and detractor counts.

Open tool

Data quality & privacy

Clean events, no surprises.

Analytics

Event Tracking Plan Generator

Generate a tracking plan with real event names, typed properties, and PII flags.

Open tool Data quality

Event Naming Linter

Check event names against a consistent snake_case object_action convention.

Open tool Privacy

PII & GDPR Event Auditor

Flag event properties that likely carry personally identifiable information.

Open tool

Sharing & SEO

Get the share preview right.

Social

Open Graph Preview

Paste any URL and see its X, Facebook, LinkedIn, Discord, Slack, and Reddit share cards.

Open tool

Built by Pug.

Open-source product analytics with unified profiles. Self-host under AGPL-3.0, or use the free cloud beta.

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