About Us
Free, Private, Browser-Based Web Tools
Open Online Tools is a collection of 2,900+ free web utilities — calculators, converters, developer tools, and text processors. Every tool runs entirely in your browser. Your data never leaves your device.
Who Runs This Site?
Open Online Tools is operated by Pixqro, based in Dhaka, Bangladesh. The project was started to provide fast, reliable, and privacy-first web tools to anyone who needs them — no sign-up, no downloads, no cost.
Contact: [email protected]
How Are Results Verified?
All calculator and converter formulas are tested against standard reference values. Financial calculators use widely-accepted formulas (compound interest, EMI amortization, ROAS). Health tools follow published guidelines from recognized organizations.
Important: These tools provide estimates only and are not a substitute for professional financial, medical, or legal advice. See our Disclaimer.
Why Open Online Tools?
We believe web tools should be free, fast, and private. Every tool on this site works instantly in your browser — no server uploads, no accounts, no tracking of your inputs.
100% Client-Side
Your data never leaves your device. All calculations happen in your browser.
Instant Results
No sign-up, no loading screens. Just open, use, and go.
Verified Formulas
Tested against standard references. Edge cases and precision are documented.
Stop Wasting Ad Spend.
Most businesses spend thousands on ads but fail to track the results correctly. If your tracking is broken, you're flying blind.
I specialize in fixing the "Gap" between traffic and profit. By combining Advanced Analytics with Conversion Rate Optimization, I ensure every click has the best chance to become a customer.
$10M+
Revenue Tracked
500+
Audits Done
3.5x
Avg. ROI Lift
Certified Expert
GA4 | Meta | HubSpotMy 3-Step Growth Mechanism
1. Deep Data Audit
I audit your entire funnel using GA4 & Heatmaps to find exactly where you're losing money.
2. Fix & Optimize
I implement server-side tracking and fix conversion leaks immediately to improve ROAS.
3. Scale Revenue
Once the foundation is solid, we scale your winning campaigns with confidence using accurate data.
Proven Technical Expertise in CRO & Analytics
5+Years Experience
With half a decade of specialized experience in technical tracking and data-driven marketing, we provide the level of precision needed for modern brands to compete in an iOS14+ world.
WEB ANALYTICS (GA4)
98%CONVERSION OPTIMIZATION
95%GOOGLE ADS / SEM
92%DATA VISUALIZATION
90%Industry Certifications
Web Analytics Mastery
Google Ads Mastery
Inbound Marketing
Meet Our Experienced
& Skilled Team
Mahfuz Mamun
CRO & Analytics Expert
HAPPY CUSTOMERS
SKILLED EXPERTS
PROJECT COMPLETED
HONOR AWARDS