Our story
About DevBizTools
Free calculators and business tools for freelancers and web developers — no login, no paywall.
DevBizTools helps solo professionals make better business decisions with calculators that run in your browser, guides that explain the math, and zero signup friction.
5+
Calculator tools
100%
Runs in browser
$0
Cost to use
Private by design
Every calculator runs entirely in your browser. Your inputs never leave your device — no accounts, no tracking of your numbers.
What we are
DevBizTools is a growing collection of small, genuinely useful calculators built for people who run their own business — freelancers, indie developers, and solo consultants. Each tool solves one clear problem: figure out your rate, compare hosting costs, and more over time.
Every tool is paired with blog content that explains the math behind it, so you understand your numbers — not just see them.
Built by a freelancer
This site was created by Delawar Shah, a front-end developer based in the UAE, who's been through the freelance transition — negotiating rates, comparing hosting bills, figuring out taxes, and learning what "billable hours" actually means in practice.
The tools here are the calculators I wished existed when I was making those decisions.
How we make money
DevBizTools is supported through affiliate links to services we genuinely recommend (hosting, payment platforms, workspace gear). We only link to things we'd suggest to a friend.
Calculator results are never influenced by affiliate relationships — all tool math is independent and client-side. See our privacy policy for details.
Get in touch
Have a tool idea, found a bug, or want to say hi? We read every message and use feedback to decide what to build next.
Send us a message — or explore our free tools and blog guides.
Try a free calculator
Start with the Freelance Rate Calculator — see your minimum hourly rate in under two minutes.
Open rate calculator