QR Code Generator and Reader
Generate custom QR Codes or read one from a PNG, JPEG, or WebP image entirely in your browser.
QR Code Generator and Reader
Generate custom QR Codes or read one from a PNG, JPEG, or WebP image entirely in your browser.
About the QR Code generator
Payload templates for common QR Codes
The Text, URL, Wi-Fi, Email, and SMS modes build the encoded string before generating the QR Code. URL mode adds https:// when needed, Wi-Fi mode escapes special characters in the SSID and password, and Email or SMS mode assembles mailto or SMSTO payloads so you can inspect the read-only encoded preview.
Styling, exports, and scan reliability
The generator can output PNG, SVG, or a clipboard image with custom size, margin, colors, and error correction. A center logo is normalized in the browser and can be sized from 10% to 30% of the code, but scan success still depends on contrast, quiet zone, printed size, payload length, and the scanner app.
Read a QR Code from an image
Decode mode accepts one PNG, JPEG, or WebP image by selection, drag and drop, or paste. The browser limits file size, source pixels, working dimensions, attempts, and processing time before decoding in a dedicated worker. It preserves the exact decoded text and only offers an open action for HTTP or HTTPS addresses; images and results are not uploaded or stored.
FAQ
Common questions and answers about this topic.
Are my QR Codes uploaded to a server?
No. All encoding runs entirely in your browser. The text you enter, the colors you pick, and the generated PNG never leave your device, and nothing is stored on our servers.
Which error correction level should I pick?
L (~7%) gives the smallest, simplest pattern — fine for clean digital displays. M (~15%) is a balanced default for most prints. Q (~25%) suits posters or labels that may get scratched or partially covered. H (~30%) is required if you plan to overlay a logo in the center. Higher levels make the pattern denser, so increase the size if scanning becomes harder.
Why can some phones not scan my QR Code?
Three common causes — low contrast between foreground and background colors (light yellow on white scans poorly), insufficient margin (set the margin slider to at least 2), or the image is too small when printed. Try a higher size (512 px or more), keep enough quiet zone, and use dark colors on a light background.
Can I make a Wi-Fi QR Code that auto-connects?
Yes — switch the content type to "Wi-Fi" above the input box, fill in the SSID, password, and security type, and the tool will assemble the correct WIFI:T:WPA;S:...;P:...;; string for you. Most modern phones recognize this format and will prompt to join. If you prefer to write it manually, paste it in Text mode using the same format and escape any special characters with a backslash.
How much data can a single QR Code hold?
The theoretical maximum is roughly 2,953 bytes for binary data at error correction level L, but practical limits are much lower because higher correction levels and special characters reduce capacity. As a rule of thumb: short URLs and Wi-Fi credentials (under 200 characters) work everywhere; aim to keep payloads under 500 characters for reliable scanning. If you exceed the limit the encoder will fail — try shortening the URL with a redirect service or lowering the error correction level.
Is the downloaded PNG good enough for printing?
PNG at 1024 px is sharp enough for most posters, flyers, and packaging when scaled to about 2–4 cm wide. For very large prints (banners, billboards) or high-DPI offset work, choose SVG in the download dialog — vectors scale to any size without losing sharpness and are preferred by most print shops.