QR Code Generator - Online Free Local Browser Tool

Overview

Convert any text, URL, WiFi config or vCard contact card into a standard QR code. Encoding and rendering happen entirely in your browser - your content never leaves the device. Tweak error-correction level, pixel size, foreground and background colors, then download a crisp PNG. Ideal for marketing, offline posters, product packaging and event check-in.

How to use

Paste text, URL, WiFi string or vCard data into the content box
Pick an error-correction level (use Q or H for posters and outdoor prints)
Tune size and colors, keeping contrast strong
Preview the QR code live and click Download PNG to save locally

Formula

QR Code encoding follows ISO/IEC 18004. Error-correction levels L/M/Q/H recover roughly 7%/15%/25%/30% of damaged data. The version (1-40) is chosen by content length and error level, then rendered to the requested pixel size.

Common scenarios

Marketing posters

Encode your campaign URL on flyers and standees. Pick Q error correction so the code stays scannable even with minor smudges.

One-tap WiFi join

Use the WIFI:S:ssid;T:WPA;P:password;; payload so guests can join your home or office network with a single scan.

vCard contact card

Wrap name, phone, email in BEGIN:VCARD ... END:VCARD; the recipient scans once to save the contact.

FAQ

Will my content be uploaded to a server? Is it safe?

No. Encoding and rendering run entirely in your browser - no upload happens. Whether it is a WiFi password or vCard data, nothing leaves your device.

What is the difference between L/M/Q/H error correction, and which should I pick?

L recovers about 7% of damaged data, M 15%, Q 25%, H 30%. Use M for on-screen display; pick Q or H for outdoor prints and dense backgrounds. Higher levels make the code denser for the same payload.

How do I make a WiFi QR code that auto-connects?

Paste a standard WiFi payload such as WIFI:S:MyWiFi;T:WPA;P:mypassword;; into the content box. Most iOS and Android cameras will offer a one-tap join prompt.

How do I make a vCard QR code so others can save my contact?

Use the format BEGIN:VCARD / VERSION:3.0 / N:Last;First / TEL:13800000000 / EMAIL:me@example.com / END:VCARD on separate lines. Stick with M or Q error correction for reliable scans.

Why might my QR code be hard to scan?

Three common causes: payload too long (high version, dense pattern); insufficient contrast between foreground and background; foreground color lighter than background, breaking finder-pattern detection. Shorten content, boost contrast, and keep foreground darker.

Can I use the generated QR code commercially?

The QR Code standard (ISO/IEC 18004) is royalty-free per Denso Wave. Images produced here can be used freely for personal or commercial projects. Just ensure the payload itself (brand URL, logo overlays) does not violate third-party rights.