tools / free, no signup
Free tools.
Small tools for tagging links, judging a channel and checking AI crawlers. They run in your browser; nothing you type is sent anywhere.
UTM builderBuild a tagged link for a newsletter, post or ad, so visits land in the right channel.Revenue per visitor and ROI calculatorRevenue per visitor, return on spend and the break-even point for one channel.AI crawler robots.txt checkerPaste a robots.txt and see which AI crawlers it allows or blocks.
See which channels actually pay
These tools estimate. Virling measures: it links every visit to the payment it led to, so revenue per visitor and return come from your real numbers. 14 days free.