A QR code (Quick Response code) is a two-dimensional barcode that stores data — URLs, text, WiFi credentials, contact info (vCard), payment details (UPI), and more. When scanned with a smartphone camera or QR reader app, it instantly opens the encoded information. QREndlessPro supports 1,421+ QR code types across 38 categories.

Is QREndlessPro free?

Yes, QREndlessPro is 100% free forever. There are no sign-ups, no subscriptions, no watermarks, and no hidden fees. All 7 tools (Generator, Bulk Generator, Customizer, Scanner, Enhancer, Decoder, and Expiry Checker) work entirely in your browser — your data never leaves your device.

What formats does QREndlessPro support?

QREndlessPro supports 7 export formats: PNG, SVG, PDF, EPS, JPEG, WebP, and Base64. QR codes can be generated in any size from 100px to 4096px, with custom colors, logos, and error correction levels (L, M, Q, H). Bulk QR codes can be exported as print-ready Grid PDFs or ZIP archives.

How do I create a QR code for WiFi?

Select 'WiFi' as the QR type in QREndlessPro, enter your network name (SSID), password, and encryption type (WPA/WEP). Click Generate — your WiFi QR code is ready instantly. Guests can scan it to connect without typing the password. You can also bulk-generate WiFi QR codes for hotels, offices, or events.

Can I add my logo to a QR code?

Yes! QREndlessPro's Customizer tool lets you embed a logo in the center of your QR code. It automatically upgrades error correction to Level H so the QR code remains scannable even with 30% of the code covered. You can also add custom colors, gradients, dot styles, and branded frames.

How do I scan a QR code from an image?

Use QREndlessPro's Scanner tool — either drag & drop an image file or use your device camera. It reads QR codes and 13+ barcode formats (EAN-13, Code 128, UPC-A, Data Matrix, Aztec, PDF417, etc.). Bulk scanning is supported — upload multiple images and export results as CSV.

Is my data safe? Does QREndlessPro collect my information?

QREndlessPro is 100% browser-based — all QR code generation, scanning, and decoding happens on your device. Your data is never uploaded to any server. There are no accounts, no tracking, no data collection. The tool even works offline after the first load as a PWA (Progressive Web App).

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ROI Calculator

Calculate return on investment (ROI), net profit, and annualized ROI (CAGR). Enter initial investment, final value, and investment duration in years. See if your investment gained or lost value. 100% browser-based, no signup.

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InstantReal-time output

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Any DeviceMac · Win · Mobile

Initial Investment ($)

Final Value ($)

Investment Duration (years)

Total ROI

Gain

+85.00%

$10,000.00 → $18,500.00 over 5 years · 1.85× your money

Net Profit

+$8,500.00

Annualized ROI (CAGR)

+13.09%

per year compounded

Multiplication Factor

1.85×

final / initial

Profitable investment — you gained money.

Your investment grew by $8,500.00 over 5 years — a total ROI of +85.00% (+13.09% per year compounded).

Formulas used

ROI % = ((final − initial) / initial) × 100

Net Profit = final − initial

Annualized ROI = ((final / initial)^(1/years) − 1) × 100

Factor = final / initial

ROI %

Total return on investment as a percentage: ((final − initial) / initial) × 100. Quickly see whether an investment gained or lost money.

Net Profit

The absolute dollar gain or loss: finalValue − initialInvestment. Positive = green gain, negative = red loss, displayed in plain currency.

Annualized ROI (CAGR)

Compound annual growth rate: ((final / initial)^(1/years) − 1) × 100. Lets you compare investments held for different lengths of time on equal footing.

Result Interpretation

Color-coded verdict — green "Gain" for positive ROI, red "Loss" for negative ROI — plus the total multiplication factor (e.g. 1.85× your money).

What is ROI?

Return on Investment (ROI) measures the profitability of an investment as a percentage of its cost. Formula: ROI = ((finalValue − initialInvestment) / initialInvestment) × 100. A positive ROI means a gain; a negative ROI means a loss.

What is annualized ROI (CAGR)?

Compound Annual Growth Rate (CAGR) is the annualized ROI — the constant annual rate that would grow your initial investment to the final value over the holding period. Formula: CAGR = ((finalValue / initialInvestment)^(1/years) − 1) × 100. It lets you compare a 3-year investment to a 10-year investment on equal footing.

How is the multiplication factor calculated?

It is simply finalValue / initialInvestment. A factor of 2.0 means you doubled your money (a 100% ROI). A factor of 0.5 means you lost half (a -50% ROI). The factor and the ROI percentage tell the same story in different units.

Why use annualized ROI instead of just ROI?

Total ROI does not account for time. A 50% ROI in 1 year is excellent, but a 50% ROI over 20 years is poor (~2% per year). Annualized ROI normalizes for time so you can compare investments held for different durations on an apples-to-apples basis.

Is my financial information private?

Yes. All calculations run entirely in your browser using JavaScript. Your investment amounts never leave your device — no signup, no server, no tracking.

Ready to use the ROI Calculator?

Free, no signup, no watermark. 100% browser-based. Your data never leaves your device.

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