QR Generator Online
Yardım ve SSS Rehberi

QR Kod Oluşturma ve Tarama Hakkında Sıkça Sorulan Sorular

QR kodu son kullanma tarihi, baskı çözünürlüğü, hata düzeltme ve logo özelleştirme ile ilgili güvenilir cevaplar bulun.

Create QR Code Now View Features

Frequently Asked Questions & Technical Advice

Do static QR codes expire? No, static QR codes created on QR Generator Online contain raw data and will never expire as long as your destination link remains active.

What is the best format for print? Vector SVG is the recommended format for commercial printing as it scales to any physical dimension without pixelation or quality loss.

Teknik Mimari ve Protokol

The Master Technical & Practical FAQ for Optical 2D Barcodes

This is the QR Generator Online knowledge base — the place to settle a technical, design, prepress, or security question about the 2D matrix barcodes defined by ISO/IEC 18004.

The answers here cover the whole span: the maths behind Reed-Solomon error correction, how a phone camera turns a photo into data, the distance-to-size ratio you print by ($S = D / 10$), and where GDPR and CCPA touch a QR workflow. Developers, marketing leads, prepress technicians, and business owners all end up needing different pieces of it.

The categories below are sorted so you can jump straight to creating, styling, printing, or deploying a code.

Technical Summary of QR Code Symbology Standards

Technical ParameterStandard SpecificationEngineering Recommendation
Governing Standard ISO/IEC 18004:2015 (Information Technology) Strict adherence for universal optical decoding
Error Correction Levels Level L (7%), Level M (15%), Level Q (25%), Level H (30%) Level H for logo embeds; Level M for clean URLs
Quiet Zone Margin Minimum 4 module widths on all 4 sides Mandatory for scanner boundary edge-detection
Optical Sizing Formula S = D / 10 (Width = Scan Distance / 10) Minimum 25 mm x 25 mm for handheld print media
WCAG Contrast Ratio Minimum 4.5:1 luminance contrast (7:1 for outdoors) Dark foreground modules on light background canvas
Maximum Data Capacity 4,296 alphanumeric / 7,089 numeric / 2,953 bytes Keep under 150 characters for rapid camera decoding

Hızlıca Nasıl Cevap Alınır

1

Select Data Payload Schema

Start from what you are encoding — URL, vCard 3.0, WiFi, WhatsApp, SMS, email, phone, location, event, crypto, plain text, or a Google Form.

2

Configure Styling & Error Correction

Set brand colours that stay above 4.5:1 contrast, choose a dot style, and if a logo is going in the middle, generate at Level H.

3

Export Vector SVG & Test Physical Proofs

Download the vector SVG or 4K PNG, then scan it on a few different phones under different lighting before it goes anywhere.

Bu Yardım Merkezinin Kapsadığı Konular

Comprehensive Technical Coverage

The error-correction maths, the URI protocols, and how camera binarization actually works — explained rather than glossed over.

Practical Prepress & Printing Guidance

Real sizing formulas, which substrate to pick, and how to compensate for ink dot gain on press.

Security & Quishing Defense Strategies

What to do so a tampered or spoofed code cannot turn your campaign into a phishing vector.

100% Free & Open-Access Knowledge Base

Open documentation that stays put — no login, no paywall, whether you are a developer or a marketer.

QR Code Resolution & Print Sizing Guide

Quick reference guide for determining physical print dimensions based on user viewing distance.

Placement / ApplicationExpected Scan DistanceMinimum Width (S)Recommended Error Correction
Business Cards & Name Tags 15 cm - 30 cm (6" - 12") 25 mm x 25 mm (1.0" x 1.0") Level Q (25%) or Level H (30%)
Table Tents & Coasters 30 cm - 50 cm (12" - 20") 35 mm x 35 mm (1.4" x 1.4") Level M (15%) or Level H (30%)
Product Packaging & Labels 20 cm - 40 cm (8" - 16") 30 mm x 30 mm (1.2" x 1.2") Level H (30%) with center logo
Flyers, Posters & Magazines 50 cm - 150 cm (20" - 60") 60 mm - 150 mm (2.4" - 6.0") Level M (15%)
Vehicle Fleet Graphics 3.0 m - 6.0 m (10 ft - 20 ft) 300 mm x 300 mm (12" x 12") Level H (30%) on cast vinyl
Highway Billboards 15.0 m - 30.0 m (50 ft - 100 ft) 1500 mm - 3000 mm (5 ft - 10 ft) Level L (7%) or Level M (15%)

Sıkça Sorulan Yaygın Durumlar

  • 1

    Enterprise IT & Security Compliance

    Check that a corporate QR rollout lines up with GDPR, CCPA, and ISO data-sovereignty rules before it ships.

  • 2

    Packaging Design & Flexographic Prepress

    Confirm a barcode die-line clears ISO/IEC 18004 contrast and quiet-zone limits before the plates get made.

  • 3

    Hospitality & Restaurant Chains

    Roll out contactless menus and guest WiFi cards that need no staff to explain them.

  • 4

    Event Organizers & Conference Coordinators

    Speed up check-in, hand out speaker slide downloads, and drop sessions into attendees' calendars.

  • 5

    Real Estate Brokerages & Marketing Teams

    Turn a yard sign into a round-the-clock lead source that opens a 3D virtual tour.

Top 5 Most Common QR Code Failures & How to Fix Them

  • Weak contrast. Pale modules on a pale background give the camera nothing to lock onto. Stay at 4.5:1 or higher.
  • A clipped quiet zone. Trim the margin too close and the scanner can no longer find where the code begins. Keep the full 4-module border.
  • A 72 DPI screenshot. Low-res web graphics blur at the module edges in print. Supply vector SVG or a 300+ DPI raster instead.
  • Too much data. A long URL packs the matrix with tiny dots that smear when printed small. Shorten the link before you generate.
  • Glossy lamination. A high-gloss coat throws spotlights back into the lens. Ask for matte or satin.

Sıkça Sorulan Sorular

Geliştiricilerin, pazarlamacıların ve işletme sahiplerinin bilmesi gereken her şey.

What is the difference between a static and a dynamic QR Code?
A static code carries the actual data — the URL, vCard, WiFi string, whatever it is — inside the matrix. Nothing to expire, no server to depend on. A dynamic code carries a redirect that points at someone else's server, which lets you edit the destination later but ties you to a subscription to keep the redirect alive.
Do QR codes created on QR Generator Online ever expire?
They stay valid for life. Unlimited scans, no recurring fee, no timer counting down — the code is self-contained.
What is the minimum physical size a QR code can be printed?
For a short URL read from 15-20 cm away, 20 mm x 20 mm (0.8" x 0.8") is the floor. On packaging and business cards, treat 25 mm x 25 mm (1.0" x 1.0") as the safe industry minimum.
How does Error Correction Level H protect my QR code with a logo?
Level H duplicates roughly 30% of the payload through Reed-Solomon redundancy. That spare copy is what lets a logo sit over the centre modules — the scanner reconstructs the covered data from the redundant bits.
Can I customize QR code colors to match my brand identity?
You can recolour the modules, the background, the corner frames, and the corner dots independently. One rule governs all of it: dark against light needs to clear 4.5:1 contrast, or scanners start to struggle.
Why is SVG format recommended over PNG for commercial printing?
SVG describes the code as geometry, not pixels. Enlarge it from a business card to a billboard and the edges stay razor-sharp, because there is no pixel grid to run out of.
Are QR codes safe from malware and phishing ("quishing")?
The code itself only holds text or a URL — it cannot carry malware. The risk is a spoofed code pointing somewhere it should not. Guard against it by showing your verified logo in the centre and printing the real destination domain in plain text beside the code.
Is my personal data stored or tracked on QR Generator Online servers?
It is not. Everything runs client-side in browser memory. Your links, passwords, contact cards, and uploaded logos are never sent to a server or kept anywhere.

Sorun Giderme Kontrol Listesi

Hold contrast above 4.5:1, protect the 4-module quiet zone, and export vector SVG for print. Then scan a physical proof before the volume run — that final check is what separates a clean launch from a reprint.

22 QR Kod Oluşturucunun Tümü

Web sitelerini, WiFi'yi, vCard'ları, belgeleri, sosyal medyayı, ödeme bağlantılarını ve konumları taranabilir kodlara dönüştürmek için 22 özel QR Kod oluşturucunun tümünü keşfedin.

URL

Mevcut bir web bağlantısına yönlendir

PDF Belgesi

PDF menü, broşür veya katalog bağla ya da yükle

Düz Metin

Düz metni bir QR koduna kodla

Kişi

İletişim bilgilerini anında paylaş

WiFi

WiFi kimlik bilgilerini QR kod ile paylaş

E-posta

Önceden doldurulmuş e-posta QR kodu oluştur

SMS

Önceden doldurulmuş SMS QR kodu oluştur

Telefon

Tek taramayla telefon araması yap

WhatsApp

WhatsApp sohbeti başlat

Sosyal

Sosyal medya profilinize bağlanın

Konum

Bir harita konumu paylaş

Etkinlik

Takvim etkinliği QR kodu oluştur

Kripto

Kripto para ödeme adresi paylaş

Google Form

Bir Google Form anketine bağlan

Instagram

Instagram profilinizi paylaşın

YouTube

YouTube kanalınıza veya videonuza bağlanın

LinkedIn

LinkedIn profilinizi paylaşın

Twitter / X

Twitter/X profilinizi paylaşın

TikTok

TikTok profilinizi paylaşın

Telegram

Telegram profilinizi veya grubunuzu paylaşın

PayPal

QR ile PayPal ödemeleri kabul et

UPI

UPI ödemelerini kabul et (Hindistan)

Gizlilik Öncelikli Platform: Statik QR kodları tarayıcınızda %100 yerel olarak oluşturulur. Dinamik kampanyalar şifreli yönlendirmeyle güvenle yönetilir.

Güvenli · Küresel · Hızlı  —  Güvenenler: binlerce kullanıcı. Hesap gerekmez.

Yardım ve SSS Rehberi Oluşturmaya Hazır mısınız?

Saniyeler içinde profesyonel, özelleştirilebilir QR Kodları oluşturmaya başlayın. Hesap gerekmez, ücret yok — asla.

Yardım ve SSS Rehberi Oluştur — Ücretsiz

Kayıt gerekmez • Sınırsız QR Kodu • PNG, SVG, WebP olarak indirin

Explore Related Free QR Code Generators & Guides

Enhance your workflow with complementary tools from QR Generator Online. Create high-resolution vector assets with zero scan caps:

URL QR Generator WiFi QR Generator vCard Business Cards Logo QR Generator Vector SVG Export Colored QR Codes Print Sizing Guide Free Pricing Guarantee

Cite or Link to this Free Resource

Webmasters, educators, and designers can cite or link to this tool using the HTML snippet below: