QR (Quick Response) codes use a 2D matrix of black and white modules to encode data. Data is first converted to a numeric, alphanumeric, or binary byte stream, then encoded using Reed-Solomon error correction, and finally arranged in a specific matrix pattern. Three finder patterns (the square "eyes" in three corners) allow scanners to detect the code's orientation and perspective. The data capacity depends on the QR version (1–40) and error correction level.
Free QR Code Generator — Online
Generate QR Codes for URLs, Text, Email & Phone
Create high-resolution, scannable QR codes for any URL, plain text, email address, or phone number. Download as PNG, SVG, or WebP instantly.
URLs, text, email & phone
High-resolution PNG & SVG
Custom size & error correction
Supports URLs, plain text, vCard, Wi-Fi credentials, etc.
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Files deleted in 2h
Fast processing
No signup needed
Simple & Fast
How to Use QR Code Generator
Convert your files in three simple steps — no software, no signup.
01
Enter Your Content
Type or paste a URL, plain text, email address (mailto:), or phone number (tel:) into the input field.
02
Choose Size & Level
Select output size (128px–2048px) and error correction level (L/M/Q/H). Higher error correction is more resilient to damage.
03
Download QR Code
Your QR code renders as a high-quality PNG or vector SVG ready for print, signage, or digital use.
Features
Why Use QR Code Generator?
Any Content Type
URLs, plain text, email addresses, phone numbers, Wi-Fi credentials, and vCard contact data all encode perfectly.
High-Res Output
Generate QR codes up to 2048×2048 pixels — sharp enough for large-format posters, banners, and packaging.
Vector SVG Export
Download as SVG for infinite scalability — embed in Illustrator, Figma, PowerPoint, or any print workflow.
Error Correction Levels
Choose L (7%), M (15%), Q (25%), or H (30%) error correction. H-level QR codes remain scannable even if 30% is obscured.
Instant Preview
The QR code preview updates in real time as you type — no need to click convert to see your QR code.
No Account Required
Generate unlimited QR codes with no login, no watermarks, and no hidden limits. Completely free.
Compatibility
Supported Formats
All the formats you need, all in one place.
| Format | Description | Extension | Best Used For |
|---|---|---|---|
| URL | Web URL (https:// or http://) | — |
Website links, landing pages, app stores |
| TEXT | Plain text up to 2953 characters | — |
Short messages, coupons, instructions |
| mailto: links with optional subject | — |
Contact cards, feedback forms | |
| PHONE | tel: number for one-tap dialling | — |
Business cards, restaurant menus |
| PNG OUTPUT | Raster PNG at chosen pixel size | .png |
Digital use, web, social media |
| SVG OUTPUT | Vector SVG for infinite scaling | .svg |
Print, packaging, large-format signs |
| WEBP OUTPUT | WebP raster for web embedding | .webp |
Website inline QR codes |
FAQ
Frequently Asked Questions
Any UTF-8 text up to ~2900 characters, including URLs, plain text, email addresses (mailto:), phone numbers (tel:), SMS messages (smsto:), and Wi-Fi credentials (WIFI:).
L (Low, 7%) produces the smallest QR code. H (High, 30%) is larger but remains scannable even if nearly a third of the code is damaged — ideal for stickers, outdoor signs, or logos overlaid in the centre.
For business cards use 1024px minimum. For posters or large signs use 2048px SVG output for crisp infinite-scale printing. The QR code module size should be at least 1cm square in print.
Yes — download the SVG or high-res PNG and overlay your logo in Figma, Illustrator, or Photoshop. Use H-level error correction (30%) to ensure scanning works even with a logo covering part of the code.
No. The QR code we generate encodes the content directly — there is no redirect URL and nothing to expire. The code is valid forever as long as the destination (URL, phone number) remains active.
None. No watermarks, no scan limits, no expiry dates, no account required. You can generate as many QR codes as you need completely free.
Real-World Uses
Who Uses QR Code Generator?
From everyday users to professionals — see how people rely on this tool every day.
Small Business Owner
QR Codes for Business Cards
Add a QR code linking to your LinkedIn profile, website, or vCard so contacts can save your details with a single phone scan.
Restaurant Manager
Contactless Digital Menus
Generate a QR code linking to your online menu URL and print it on table cards, replacing physical menus with a hygenic digital alternative.
Event Organiser
Event Check-In & Ticketing
Encode ticket IDs or registration URLs into unique per-attendee QR codes for fast event check-in scanning at the door.
Marketer
Offline-to-Online Campaign Links
Add QR codes to print ads, packaging, and posters that link to landing pages, letting you track offline-to-online conversion rates via UTM parameters.
Office Manager
Wi-Fi Credential Sharing
Encode Wi-Fi credentials (WIFI: format) into a QR code for the office or reception area so guests connect instantly without asking for the password.
Warehouse Manager
Inventory & Asset Labelling
Generate unique QR codes encoding asset IDs or product SKUs for scannable inventory labels on shelves, equipment, and shipping boxes.
Why TransmuteBox?
TransmuteBox vs. Alternatives
See how we compare to desktop software and other online converters.
| Feature |
Our Tool TransmuteBox |
QR Code Monkey | Google Chart QR |
|---|---|---|---|
| URL / text / email / phone | URL/text | ||
| SVG vector export | |||
| Up to 2048px PNG | Limited | ||
| Error correction L/M/Q/H | Partial | ||
| No account required | Reg. required | ||
| No watermarks | |||
| Free to use | Limited | ||
| API access | Pro | Paid |
Under the Hood
Technical Specifications
Built on industry-standard open-source tools for maximum quality and reliability.
Limits & Restrictions
- Max data: ~2,953 alphanumeric chars (QR version 40)
- Max PNG output: 2048 × 2048 px
- Min recommended module size: 2 px per module
python-qrcode
QR code
SVG
PNG
ISO/IEC 18004
error correction
Conversion Engine
python-qrcode 7.x + Pillow 10.x for PNG; manual SVG path generation
Output Quality
Lossless PNG at any pixel size; vector SVG with infinite scalability
Average Speed
QR code generation in under 500 ms regardless of content or size
Data Security
HTTPS transfer · generated server-side · output auto-purged in 2 h
Standard
ISO/IEC 18004:2015
Error correction
L (7%), M (15%), Q (25%), H (30%)
Vector export
Infinite-scale SVG
Complete Guide
QR Codes: How They Work, Error Correction, and Best Practices
QR codes have become one of the most ubiquitous information-transfer technologies in the world. Understanding how they work, how to choose the right settings, and how to use them effectively helps you deploy them with confidence.
How QR Codes Store and Encode Data
Error Correction Levels Explained
QR codes use Reed-Solomon error correction to remain scannable even when partially damaged or obscured. Level L (7% recovery) produces the smallest code and is fine for clean digital display. Level M (15%) is the standard for most uses. Level Q (25%) is good for industrial labels where minor damage is likely. Level H (30%) is required when you plan to overlay a logo or icon in the centre of the code — the high redundancy compensates for the covered modules.
PNG vs SVG: Choosing the Right Output Format
Use PNG for digital display at a fixed size (website, email, app screens). Use SVG for anything that will be printed or scaled — business cards, banners, packaging, signage. SVG is a vector format that renders perfectly at any size without pixelation. When printing, always use SVG or a PNG at minimum 1000×1000 px to ensure each module is sharp at the printed size.
Adding a Logo to the Centre of a QR Code
A logo overlay covering up to 30% of the QR code is safe if you use H-level error correction, because H-level can recover from 30% data loss. Download the high-res PNG or SVG, open it in Figma or Photoshop, and place your logo centred on the code, scaled to cover no more than 25–30% of the total area. Always scan-test the result before printing — some scanner apps are stricter than others.
QR Code Best Practices for Print and Signage
Minimum module size for reliable scanning is 1cm for the smallest module at typical scan distances (20–30cm). For outdoor signage scanned from 1–2m away, scale up proportionally — at 2m scanning distance, each module should be at least 4mm. Always maintain a quiet zone (white border) of at least 4 modules on all sides — QR codes printed without adequate margin fail to scan reliably. Use high-contrast black on white; avoid coloured modules unless scan-tested thoroughly.