It was a Tuesday afternoon. I had a blog post I wanted to check before publishing — I just needed to know the keyword density, whether the meta description was the right length, and if the readability score was acceptable. Standard pre-publish checks.
Semrush wanted $129.95 a month. Ahrefs wanted $99. Every "free" alternative had a sign-up wall, a daily limit, or served me an ad before telling me the answer.
I'm a developer. These are arithmetic problems. Keyword density is word count divided by total words. Meta tag length is a character count. Flesch-Kincaid is a formula from 1975. I opened a code editor and built a keyword density checker in about 45 minutes.
That was the first Tabutility tool. I didn't plan what came after.
The keyword density checker worked well. So well that I kept finding new reasons to open it. Then I noticed the next friction point: I had no good way to check readability. Another weekend, another tool.
Within a month I had seven SEO tools:
Together they do everything I was being asked to pay $130/month for. Combined, they now get more organic traffic than any other section of the site — which I take as strong evidence that other people are also tired of paying agency prices for things that are just arithmetic.
Once the SEO tools were running, I started noticing other recurring friction points.
A salary negotiation. I needed to know my actual take-home pay under the new contract. Every UK salary calculator I found either had ads plastered over the answer or required me to create an account to save my result. So I built the UK salary calculator — no ads, no account, just the number.
A mortgage decision. I wanted to stress-test different scenarios: what happens if rates go up 1%? What if I overpay £200/month? The mortgage calculators I found gave me one number and called it a day. I built one that lets you model the whole thing.
Each friction point became a tool. Each tool attracted people with the same friction point. I looked up one day and there were 151 tools across salary, tax, mortgage, developer utilities, health calculators, and more.
The current collection spans:
Every tool runs entirely in your browser. Nothing is sent to a server. No account. No sign-up. The answer appears, you close the tab.
Alongside the tools, I wrote a step-by-step DIY SEO guide that documents exactly what I do to rank pages without paying an agency. Nine steps, seven tools, $0, approximately four hours of work per post.
It covers keyword research, on-page optimisation, readability scoring, meta tag optimisation, internal linking, and how to measure whether it's actually working. The guide uses only free tools — mostly Tabutility's own, plus Google Search Console and Google Analytics, which are free.
For comparison, a typical SEO agency charges £500–£2,000/month for the same work on a small site. The guide covers what they do. You can decide what's worth paying for.
The honest answer: I built these tools for myself, and charging for them would have required a payment system, account management, customer support, and a whole support operation I had no interest in running.
The secondary answer: free tools with no sign-up wall get used. And used tools get shared. The salary calculators get linked to from Reddit, personal finance blogs, and job offer discussions. The SEO tools get linked to from content marketing guides. That organic sharing is worth more than the subscription revenue I'd have earned from the fraction of users willing to pay.
The site is supported by Google AdSense — ads that appear on tool pages after the answer is already visible. I deliberately placed them below the result rather than between you and the answer.
More salary pages — I'm building detailed take-home pay guides for every major city and income level in each country Tabutility supports. More tax tools as 2027 rates are confirmed. Possibly a mobile app if the demand is there.
If you have a tool you wish existed — something you've been paying for, or couldn't find for free — the comments on the Product Hunt launch page are the right place to say so. I read every comment.
There's no catch. Every tool is free with no sign-up, no account, and no daily limit. The site is supported by AdSense advertising — ads appear on pages but always after the answer is visible, not between you and the result.
For content-side SEO — keyword density, readability, meta tags, heading structure, word count — yes, the free tools do everything you'd use Semrush's on-page checker for. What they don't do is backlink analysis, competitor research, or rank tracking, which require crawling the web and can't be done in a browser tab.
The calculators use the current official tax rates and thresholds for each country. UK figures use HMRC's published rates; US figures use IRS tables; Australian figures use ATO rates. They're updated when official rates change. For complex situations (multiple income sources, unusual deductions), consult an accountant — these tools are for quick estimates, not professional advice.
Yes — leave a comment on the Product Hunt page or use the feedback link on any tool page. The most-requested tools get built first. The SEO suite and several of the salary calculators were built because people asked for them.