Our Story
ToolCentrix was built by SMD Sartaz, a performance marketing and digital growth specialist based in India, operating under the brand FireFlies Digital.
The idea came from a simple frustration — every time we needed a quick calculation or conversion, we landed on sites cluttered with ads, pop-ups, and paywalls. Simple tools that should take seconds were buried under layers of junk.
So we built ToolCentrix: a clean, fast collection of utility tools that just work. No distractions, no friction — just the tool you need, instantly.
What We Build
ToolCentrix covers 9 categories of everyday utility tools:
- Finance — EMI, GST, SIP, compound interest, PPF calculators
- Health — BMI, TDEE, body fat, pregnancy tools with metric and imperial
- Developer Tools — JSON formatter, base64, UUID, regex, cron generator
- Text Tools — word counter, case converter, diff checker, slug generator
- Converters — temperature, length, weight, currency, time zone
- Calculators — age, percentage, tip, aspect ratio, countdown
- Generators — password, QR code, lorem ipsum, random names
- Marketing & SEO — UTM builder, SERP preview, hashtag generator
- Checkers — IP lookup, DNS, SSL, website status, redirect tracer
Our Principles
Every tool is pure HTML and JavaScript — no frameworks, no heavy libraries. Pages load in under a second on any connection.
All tools support both metric and imperial units. Finance tools support INR, USD, GBP, EUR and more. Built for users worldwide.
Everything runs in your browser. We don't store your inputs, we don't track your calculations, and we don't sell your data.
ToolCentrix will always be free. No freemium model, no "upgrade to unlock", no premium tier. Every tool, always free.
Built By
SMD Sartaz
Performance marketing specialist & digital growth strategist · FireFlies Digital · Based in India
Worked with clients across India and Saudi Arabia in Google Ads, Meta Ads, SEO, landing page development and lead analytics.
Contact & Feedback
Have a tool request, found a bug, or want to give feedback? We'd love to hear from you.