Free Marketing & SEO Tools
Every number a marketer argues about in a meeting, worked out in seconds — paid media economics, SEO diagnostics, and the generators that save an afternoon of fiddling.
120 free tools · no signupWhat is in this set
The paid-media calculators answer the questions a dashboard will not: what your break-even ROAS actually is at your margin, what a click is worth before you bid on it, and whether a lift you measured is real or noise. The SEO tools go the other way — they take a page or a profile you already have and tell you what is wrong with it, from keyword cannibalisation to anchor-text distribution to crawl budget waste.
Why the numbers here differ from your ad platform
Ad platforms report ROAS from raw revenue and raw spend because they cannot see your cost of goods. A 4x return looks excellent until you subtract a 75% product cost, at which point it is exactly break-even. Several of these tools ask for margin precisely so the answer reflects your business rather than the platform's view of it.
Where the modelled numbers are flagged
Google publishes no formula for Quality Score, no composite for Core Web Vitals, and no target anchor-text ratio. Where a tool here scores something Google does not publish, the weighting is an Arb Digital model, it is stated on the page, and the inputs are editable so you can substitute your own assumptions.