Engineering as Marketing

Growth Resources

Free tools, calculators, and guides to help you master attribution, A/B testing, and revenue optimization.

Free Tools
UTM Link Builder
Create error-free GA4 and TikTok tracking links with real-time validation and campaign presets.
Popular
CRO ROI Calculator
Calculate exactly how much revenue you are losing by not A/B testing your landing pages.
Financial
Pixel Generator
Generate conversion snippets for GA4, Meta, and TikTok.
Dev Tool
Significance Calculator
Check if your A/B test results are statistically valid (Frequentist).
Sample Size Calculator
Calculate how much traffic you need before starting a test.
Funnel Analyzer
Visualize drop-off points and calculate lost revenue per stage.
Guides & Definitions
Swipe File
50+ A/B Testing Ideas (The 2025 List)
Browse Ideas
Interactive Audit
The Ultimate CRO Audit Checklist
Start Audit
Data
2025 Conversion Rate Benchmarks by Industry
View Data
Glossary
What is ROAS? The Definitive Guide
Read Definition