QR Code Generator

Generate high-quality QR codes offline instantly. Customize sizes, colors, and error tolerances.

QR Code Parameters

Input Text or URL

Styling Configurations

Foreground Block Color

Background Fill Color

Dimensions Size (px)

256px

Error Correction Level

Visual QR Code Display

0 characters encoded Offline Render

What is a QR Code?

A **QR Code (Quick Response Code)** is a type of two-dimensional matrix barcode first designed in 1994 for the automotive industry in Japan. Unlike standard linear barcodes that store data in one dimension (horizontally), QR codes store information in both horizontal and vertical directions, allowing them to hold up to **3KB** of data in a tiny grid.

QR codes are incredibly useful for sharing URLs, contact cards (vCards), Wi-Fi logins, and payment keys. Standard smartphones can scan QR codes using native camera apps, making them an excellent bridge between offline print materials and digital web pages.

Frequently Asked Questions (FAQ)

What do the Error Correction Levels mean?

Error correction (Reed-Solomon algorithm) allows a QR code to be scanned successfully even if parts of it are dirty, torn, or covered: - **L**: Up to 7% damage recovery. Best for simple URLs to keep grid patterns sparse and easy to scan. - **M**: Up to 15% damage recovery. Standard default for general use. - **Q**: Up to 25% damage recovery. - **H**: Up to 30% damage recovery. Recommended if you intend to insert a custom logo in the center of the QR code.

What color choices are safe for scanning?

Always maintain **high contrast** between the foreground blocks and background fill. Standard scanner sensors emit red lights or rely on contrast thresholds; scanning will fail if you use low-contrast pairs (like yellow on white) or invert colors (light code blocks on a dark background) on older reader hardware.

Is it safe to type private keys or Wi-Fi passwords here?

Absolutely. This generator runs entirely client-side. The compiled `qrcode.min.js` library is embedded directly inside the HTML markup, and the browser draws the grid modules onto a local `