The right tool,
in one search.
Calculators, converters, SEO and PDF utilities that run right in your browser. Fast, private and free.
- Instant resultsRuns in your browser
- PrivateInputs stay on your device
- No accountOpen a tool and go
- Works on mobilePhone, tablet, desktop
Popular tools
What people open most often on Toolfix.
Money & business calculators
Detailed calculators for the decisions that cost real money.
Loan & EMI Calculator
Monthly payment, total interest and a full repayment schedule.
Open toolE-Commerce Profit Calculator
See true margins after Amazon FBA, Shopify and payment fees.
Open toolAuto Loan Refinance
Compare your new monthly payment and lifetime interest saved.
Open toolBusiness Valuation
Estimate what your online business is worth using SDE multiples.
Open toolBrowse by category
SEO, PDF, images, text, developers, health, business and more.
Learn the numbers behind the tools
Plain-English guides with the formulas and benchmarks our calculators use.
Unit Economics: CAC, LTV & Payback
How to measure what a customer costs and what they are worth.
Read guide → E-commerceDropshipping Profit Margin Blueprint
Markup formulas, ad CPA limits and avoiding fee leakage.
Read guide → CreatorsYouTube Sponsorship Pricing & CPM
CPM benchmarks by niche and how to price a sponsored video.
Read guide → AI & TechUltimate Guide to AI Prompt Engineering
Stop writing bad prompts. Learn the RTF & CARE formulas.
Read guide →Built to be quick, honest and free.
No paywalls, no trial limits and no account. Open a tool, get your answer, move on.
- Fast by design
Most tools calculate as you type, with no page reloads.
- Privacy first
Browser-based tools process your data locally. We don’t store your inputs.
- Free forever
Every tool is fully free. Ads keep the lights on.
- Plain-English guides
Tools come with a short guide on how they work and where their limits are.
Common questions
Are the tools really free?
Yes. Every calculator, converter and generator on Toolfix is free to use with no hidden paywalls, trial limits or subscriptions.
Do I need to create an account?
No. You can open and use any tool instantly without registering, giving an email address or installing anything.
Is my data safe?
Browser-based tools such as calculators, word counters and QR generators run locally on your device, so your inputs are not sent to or stored on our servers. A few tools that need to fetch online data (for example a website analyzer) send only the URL you enter.
How accurate are the financial calculators?
Our calculators use standard published formulas and we review fee and rate assumptions regularly. Results are estimates for planning, not financial, legal or tax advice.
Can I use Toolfix on my phone?
Yes. Every tool is built with a responsive layout that works on iOS and Android phones and tablets.
Can’t find what you need?
Browse the full directory or tell us which tool to build next.
See all tools →Suggest a tool