About QR Code Generator & Decoder

QR Code generates QR images from URLs, plain text, Wi-Fi strings, or vCard text you prepare yourself, and it can decode QR content from the current canvas or an uploaded image.

Adjust size and error-correction level, then download a PNG for docs, testing, signage, or mobile debugging.

How to use QR Code

Enter the text or URL you want to encode.
Choose a QR size and L/M/Q/H error-correction level.
Generate the QR preview, then download PNG, copy the source text, or decode the current QR.

When you would use it

Create a temporary QR for a staging URL, deep link, or login page.
Decode a QR from a screenshot, poster, or device screen.
Generate a fixed-size PNG for documentation, slides, or printed material.
Check that a QR can still be decoded before publishing it.

QR size, error correction, and content length

A QR code encodes text into black and white modules. Longer content makes the modules denser; higher error correction can survive more damage or covering, but it also increases complexity.

L/M/Q/H are error-correction levels from lower to higher.
Larger sizes work better for print or low-resolution screens.
For long URLs, use a stable short link to reduce QR density.
Generation and image decoding run locally in the browser; images are not uploaded to wetool.site.

QR Code FAQ

Can it decode uploaded images?: Yes. The browser reads the local image into a canvas and tries to decode QR pixels locally.
Which error-correction level should I choose?: M is usually fine for screens. Use Q or H for print, stickers, or places where the code may be partly covered.
Why does scanning fail?: Common causes are too much content, small image size, poor contrast, missing quiet zone, or compression blur.

QR Code and link safety

A QR code only carries text; it does not prove that a link is trustworthy. Before publishing, verify the domain, HTTPS, redirect chain, and expiration so temporary or sensitive links do not become long-lived assets.

WiFi QR Code format reference

People searching for wifi qr code often need to encode the network name, security type, and password in a scanner-readable text format.

A common format is WIFI:T:WPA;S:NetworkName;P:Password;;, where T can be WPA, WEP, or nopass.
If the SSID or password contains semicolons, commas, backslashes, or quotes, test whether the target scanner handles escaping correctly.
For public spaces, avoid exposing admin passwords; use an isolated guest network rather than the internal network.

QR code capacity and error correction

More text is not always better. Longer content makes the modules denser, which hurts scanning on small prints and low-quality cameras.

A short URL is usually better than long text for print, posters, and quick phone scanning.
Higher error correction survives more damage or logo overlap, but it also makes the QR code denser.
For posters, business cards, or screens, scan the final QR code on a real phone at the final display size.