Free Tools
Free tools.
No signup, no email gate.
Small, sharp tools we built for ourselves and opened up. Each one runs in your browser and does its whole job without asking who you are.
Campaign tracking
UTM Builder
Generate campaign URLs with correct UTM parameters. Presets for newsletters, social, and AI sources; values lowercased automatically.
Open tool →Campaign tracking
UTM Checker
Paste a campaign URL and catch the mistakes that corrupt analytics: missing utm_source, uppercase values, duplicates, typos, tags lost after #.
Open tool →AI search
AI Readiness Checker
Check whether your site lets AI crawlers in. Scans your robots.txt for GPTBot, ClaudeBot, PerplexityBot, and the rest — and tells you what to fix.
Open tool →Budgeting
Marketing ROI Calculator
Enter spend and revenue per channel; see ROI, ROAS, and profit instantly. Useful for deciding where next month's budget goes.
Open tool →The tool behind the tools
Attrifast ties every channel — search, social, email, and AI engines — to real Stripe revenue. $9.99/mo flat, 2-minute setup.
- One script tag and a Stripe key — live in minutes
- Cookieless, so no consent banner for analytics
- Every AI referral matched to the payment it produced
7-day free trial · $0 due today · then $9.99/mo · cancel anytime
