Free Tools
for Business Professionals
12 interactive tools for restaurateurs, retailers, marketers and logistics managers. Calculate, generate, print — no account needed.
Hospitality & Food Service
3 toolsWiFi Poster Generator
Create a print-ready professional WiFi poster for your venue in seconds.
Menu Cost Calculator
Calculate your food costs, cost ratios and ideal selling prices for each dish.
Table Turnover Calculator
Estimate your maximum revenue per service based on your turnover rate and average spend.
Marketing & Retail
4 toolsGoogle Review Link Generator
Generate a direct link to your Google Business reviews page to embed in a QR code.
Sale Label Creator
Create professional price tags with discount and crossed-out price, ready to print.
UTM QR Builder
Build tracked UTM URLs to precisely measure your QR code campaigns.
Marketing ROI Calculator
Calculate return on investment, ROAS and acquisition cost for your campaigns.
Events & Professional
3 toolsEvent Badge Generator
Create print-ready professional badges for attendees, speakers and staff.
vCard Generator
Generate and download your digital contact card (.vcf) to share via QR code.
Payment QR Code
Create your payment link for PayPal, Lydia, Stripe and generate the corresponding QR code.
In-depth sector guides
Go further with our strategic guides featuring benchmarks, practical cases and real-world examples.
Hospitality & Food Service Guide
Table turnover, average spend, Google reviews, digital menu — the KPIs that matter.
🛍️Retail & Commerce Guide
Labels, SKU, inventory turnover, loyalty — run your business with the right figures.
📦Industry & Logistics Guide
Traceability, DataMatrix, Industry 4.0, stock management — the complete guide.
🎯Events & Tourism Guide
Badges, lead collection, live programme — organise seamless events.
Why use these free tools?
Tools built for professionals
Unlike generic calculators, these 12 tools were designed with the real-world constraints of restaurateurs, retailers, logistics managers and marketers in mind. Benchmarks are sector-specific, formulas are validated, and exports are suited to professional use.
No sign-up, no catch
All tools run directly in your browser — no account required. Calculations are performed client-side, meaning your data never passes through our servers. Free means free, not "free in exchange for your data".
From calculation to QR code in a few clicks
Each tool is designed to lead to a concrete action. Calculated your ROI? Create a UTM QR code to track it precisely. Generated a WiFi poster? Embed a branded K-QRCODE QR code. The logic follows a funnel: tool → result → action.
Frequently asked questions
Are these tools really free? Yes — unlimited use, no sign-up and no intrusive advertising.
Can I print the results? Yes, the WiFi poster, labels and badges tools support direct printing from your browser.
Can I export to CSV? Yes, the SKU and vCard generators allow export to CSV and VCF files.
Next step
Turn your results into dynamic QR codes
These tools show you the potential. K-QRCODE gives you the dynamic QR codes, analytics and smart rules to actually unlock it.