QR Code

About this API

The QR Code API provides a complete and easy-to-integrate QR code solution for your applications. It not only quickly converts any text string or URL into a high-quality QR code image but also supports style customization to match your brand's visual identity. Additionally, this API has a reverse decoding function that can identify and parse the QR code information contained in an uploaded image file. Whether you need to embed dynamic links in marketing materials or implement a scanning function within your app, this API provides stable and efficient service.

Key Features

• Text and URL Encoding: Supports encoding any text content or web link into a standard QR code.
• Image Generation: Can generate QR code images in multiple formats (e.g., PNG, SVG), ensuring excellent clarity on both digital screens and printed materials.
• Style Customization: Allows developers to customize the QR code's color (foreground, background), size, margin, and even embed a brand logo in the center to create a unique, branded QR code.
• High Error Correction Options: Supports setting different error correction levels (L, M, Q, H), ensuring the QR code can still be successfully scanned even if a part of it is obscured or damaged, guaranteeing reliability in complex environments.
• QR Code Decoding: Provides a decoding function that can accept an image file and return the QR code data it contains, which is core to implementing an in-app "scan" feature.

Use Cases

Scenario 1: Generate Dynamic, Trackable Admission Tickets for Offline Events

Situation: An event organizer needs to generate unique electronic tickets for attendees and quickly verify them at the entrance. Implementation: After a user successfully purchases a ticket online, the system generates a unique ID for that user's order. The backend calls the QR Code API to encode a specific URL containing this ID (e.g., https://juheapi.com/checkin?ticket=UNIQUE_ID) into a QR code. This QR code is sent to the user via email or app. At the event, staff use a device with a scanning app to scan the user's QR code. The app decodes the URL and verifies the ticket's validity with the server, completing the check-in. This API makes it easy to create personalized tickets for thousands of attendees.

Scenario 2: Implement Contactless Ordering and Payment in a Restaurant

Situation: A restaurant wants to guide customers to its online menu to complete ordering and payment by placing QR codes on the tables. Implementation: The restaurant generates a unique QR code for each table (e.g., Table A01, A02). Each QR code contains a URL pointing to the restaurant's online ordering page with the table number as a parameter (e.g., https://juheapi.com/?table=A01). The backend batch-calls the QR Code API to encode these URLs into QR codes, which can be customized with colors to match the restaurant's decor. These QR codes are then printed and placed on the corresponding tables. When customers scan the code, the system automatically identifies the table number, greatly simplifying the ordering process.

Scenario 3: Provide Detailed Information and After-Sales Support on Product Packaging

Situation: A consumer electronics company wants to make it easy for customers who purchase its products to access manuals, warranty information, and technical support. Implementation: For every product that leaves the factory, the company prints a QR code on its packaging. This QR code is generated by the QR Code API and contains a URL pointing to the product's support page. After scanning it with their phone, users can instantly access online manuals, watch instructional videos, register for warranty, or contact customer service. Compared to printing thick manuals, this method is not only cost-effective and environmentally friendly but also allows for the online content to be updated at any time, providing users with more timely and richer information.

How it Works: Endpoints & Response

This API provides two core functions: generation and decoding.

Generation Endpoint: Receives parameters such as text (content to encode), color, logo, etc., and directly returns a QR code image file (e.g., PNG). Decoding Endpoint: Receives an image file as input and returns a JSON object containing the decoded text content.

This design makes integration very intuitive. For the generation function, developers can directly embed the API call URL in the src attribute of an <img> tag in HTML to dynamically display QR codes on web pages or in emails, without needing to store any image files on the server. For the decoding function, a simple file upload request completes the operation, making it easy to implement in various programming languages.