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Generador de Códigos QR — Herramienta online gratis

Crea códigos QR para URLs, texto, WiFi o lo que sea

Genera códigos QR para URLs, texto, WiFi, email, SMS. Descarga como PNG. Gratis, instantáneo, sin marcas de agua.

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Free QR code generator — no watermark, no signup, unlimited

Herramientaolis QR Code Generator produces high-quality QR codes for URLs, WiFi, email, and SMS, entirely in your browser. Download as PNG in 256, 512, or 1024 pixels. No watermark, no signup, no usage limits, no tracking of what you encode.

Supported QR types

  • Text / URL — Any link or plain text (≤ 2,900 chars)
  • WiFi — Automatic connection for guests and customers
  • Email — Pre-filled recipient, subject, and body
  • SMS — Pre-filled phone number and message

How to use this tool

  1. 1

    Pick a content type

    Choose Text / URL, WiFi, Email, or SMS. Each type generates a QR code that behaves differently when scanned by a phone camera.

  2. 2

    Fill in the fields

    Type the URL, WiFi credentials, email subject, or phone number. All fields stay local — nothing is sent anywhere.

  3. 3

    Adjust size & error correction (optional)

    Bigger sizes print cleaner. Higher error correction lets the QR code work even if partially covered or dirty.

  4. 4

    Click Generate

    The QR code renders instantly on canvas. Preview appears below the form.

  5. 5

    Download or copy

    Download the QR code as a high-resolution PNG, or copy the image directly to your clipboard.

Error correction explained

Error correction is the percentage of the QR code that can be damaged or obscured while still being scannable. Higher levels produce busier-looking codes but work in worse conditions.

  • L (~7%) — Screens, PDFs, anywhere pristine
  • M (~15%) — Printed flyers, business cards (default)
  • Q (~25%) — Stickers, labels that may scuff
  • H (~30%) — Outdoor signs, logos embedded in the center

Where QR codes work best

  • Restaurants — Menus, WiFi password for guests
  • Marketing — Print ads, posters, product packaging
  • Events — Ticket check-in, venue WiFi, digital business cards
  • Payments — UPI, PayPal.Me, Revolut links
  • Small business — Google review link, Instagram follow, contact email

Frequently Asked Questions

How does the QR Code Generator work?
It uses the open-source qrcode JavaScript library to encode your input as a QR matrix, then renders it on an HTML canvas. Everything happens in your browser — no server-side generation.
Are WiFi passwords safe in a QR code?
Your WiFi password is encoded directly into the QR image in your browser. The image is never transmitted anywhere. However, anyone who can scan the printed QR can connect — so treat the generated image like you'd treat your written password.
What's the maximum text length?
Roughly 2,900 characters for alphanumeric input at error-correction level L. Very long text produces dense QR codes that may be hard for phone cameras to scan. For URLs, shorter is better.
Which error correction level should I choose?
Low (~7%) for digital displays. Medium (~15%) for printed marketing materials — our default. Quartile (~25%) for stickers or labels that might get dirty. High (~30%) for outdoor signs or codes with logos embedded.
What QR formats does this support?
Plain text, URLs, WiFi (WPA/WEP/none), email (with pre-filled subject and body), and SMS (with pre-filled message). Scanners auto-detect the type from the encoded prefix.
Can I add a logo to the QR code?
Not yet in this version. Use error correction level H (30%) and a separate image editor to overlay a logo in the center — the error correction compensates for the obscured pixels.
Does it cost anything to generate QR codes?
No. Generate unlimited QR codes, download as many PNGs as you need, commercial use allowed, no watermark, no signup.

Puntos clave

  • QR Code Generator is a free, browser-based image tool — create qr codes for urls, text, wifi or anything.
  • No signup, no downloads, no file uploads — your data stays on your device.
  • Works on desktop, tablet, and mobile. Install as a PWA for offline access.

How to Use QR Code Generator

  1. Open the tool: Launch QR Code Generator on Herramientaolis — no account or download needed.
  2. Enter your data: Paste text, enter values, or select a file directly in your browser.
  3. Get instant results: Everything is processed locally — results appear immediately.
  4. Copy or download: Save your output or share it. Bookmark for quick access next time.

QR Code Generator — Quick Facts

Precio
Gratis — sin límites, sin marcas de agua, sin paywall
Privacidad
100% en el navegador — ningún dato sale de tu dispositivo
Plataforma
Cualquier navegador moderno — escritorio, tablet o móvil
Categoría
Image Herramientas on Herramientaolis
Sin conexión
Works offline after first visit (Progressive Web App)
CaracterísticaDetalles
HerramientaQR Code Generator
CategoríaImage
Requiere registroNo
Subida de archivoNinguno — procesado en el navegador
Compatible con móvilTotalmente adaptable
CosteGratis para siempre

Why Use QR Code Generator?

You should try QR Code Generator for a quick, private way to create qr codes for urls, text, wifi or anything. All processing happens in your browser. Your files and data never leave your device. According to web.dev, client-side processing is the gold standard for privacy.

On the other hand, dedicated APIs or desktop tools suit batch processing better. They also handle server-side automation. For everyday tasks, browser tools offer the best speed, privacy, and convenience.

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100% Privacidad. Esta herramienta funciona enteramente en tu navegador. Tus datos nunca se suben a ningún servidor.