Free Marketing and SEO Tools
9 free tools
For people who have to justify a budget. Built to give the number that survives scrutiny, not the flattering one.
Two of these look at a website and the rest look at money. SEO Checker runs twenty on-page checks against a single URL and answers in seconds, which is what you want when the question is whether one page is set up properly. SEO Audit crawls up to twenty-five pages, adds Core Web Vitals from Google, and finds the problems that only exist across a site: duplicate titles, thin pages, broken internal links. Start with the checker and reach for the audit when the question is about the site rather than the page.
On the money side, what matters is what you are dividing by. ROAS measures revenue against ad spend and flatters you, because it ignores what the product cost to deliver. Google Ads ROI and Marketing ROI subtract cost of goods and fees, which is why their numbers are smaller and why they are the ones to take into a budget conversation. Margin settles the markup argument: pricing at a 50% markup does not give you a 50% margin, and the gap is where money quietly goes.
Conversion Rate and A/B Test Sample Size are a pair. The first tells you your rate and whether a difference in front of you is statistically real. The second tells you how much traffic a test needs before it could say anything at all. Running the second one first saves you a fortnight spent proving nothing.
- SEO CheckerTwenty on-page checks for any URL, with a plain-English fix for each one.
- SEO AuditA crawl-based audit with Core Web Vitals, broken links and prioritised fixes.
- ROAS CalculatorYour ROAS, and the break-even ROAS your margin actually demands.
- Google Ads ROI CalculatorTrue ad ROI once COGS and management fees are counted, not just spend against revenue.
- Conversion Rate CalculatorConversion rate, required traffic, lift — and whether your A/B result is real.
- Marketing ROI CalculatorSpend to profit across the whole funnel — CPL, CAC, LTV, ROMI and payback.
- Margin CalculatorMargin, markup and break-even — and why pricing by markup quietly costs you money.
- A/B Test Sample SizeHow much traffic a test needs before its result means anything — power included.
- UTM BuilderBuild UTM links that will not break your GA4 reporting — with validation, not just concatenation.
Frequently asked questions
What is the difference between the SEO checker and the SEO audit?
Scope. The checker looks at one URL, returns twenty on-page checks immediately, and asks for nothing. The audit crawls up to twenty-five pages, pulls Core Web Vitals from Google, and reports site-wide problems a single page cannot reveal. It takes about a minute and emails the report to you.
Why is my ROAS good but my ROI bad?
Because ROAS only counts ad spend. If a product costs sixty rupees to deliver and sells for a hundred, a 3x ROAS can still lose money once cost of goods and management fees are counted. That gap is the reason the ROI calculators exist, and the reason their answers are less pleasant.
Is the A/B significance test the real thing?
Yes. It is a two-proportion test rather than a rule of thumb, and it reports the p-value instead of a verdict. The sample size tool includes statistical power, which most free calculators skip, and that is the half that stops you calling a test early on a difference that is noise.
Do the SEO tools store the URLs I check?
The audit does, briefly. A crawl is cached for twenty-four hours so a repeated request does not re-crawl somebody's site, and a report you were emailed a link to is kept for ninety days. The checker stores nothing. Both are set out on the privacy page, with the periods rendered from the same constants the deletion job runs on.