QR Code Generator & Reader

The five content types

Each type builds a different payload behind the code. "Link / URL" stores the address you typed, unchanged. "Wi-Fi" stores the network, password, and security protocol (WPA/WPA2/WPA3, WEP, or no password) in a syntax phones themselves recognize to offer connecting automatically, with an option to mark the network as hidden. "WhatsApp" uses only the digits of the number you enter to build a wa.me link, with the optional initial message already filled into the chat. "Contact / vCard" stores a vCard 3.0 card with full name (required), phone, email, company, and job title (all optional), which a phone offers to save straight to contacts. "Free text" stores any content with no special formatting.

Error correction: why it switches on its own when you add a logo

The correction level (L, M, Q, or H) sets how much of the code can be damaged or covered and still scan: L recovers from the least damage and fits the most data; H recovers from the most damage but fits less data per code. Choosing an image under "Center logo" forces level H automatically and disables the selector — it's the only level with enough redundancy to let a logo cover the middle of the code without breaking the scan.

The read-tested badge: the tool decodes its own code before handing it over

After generating the QR code, the tool reads the image back with the same decoding engine used on the reader tab, and compares the result against the original content. A "✓ READ TESTED" badge confirms the code decodes back to exactly what you typed; a "⚠ TEST BEFORE USE" badge appears when that check fails or is inconclusive — usually because the foreground and background colors are too close — and is a signal to adjust the colors before using the code.

Colors, presets, and advanced options

Five ready-made combinations — Black and white, ProntoUso, Violet, Blue, and Warm — set the foreground and background in one click. Open "Advanced customization" to pick custom colors in both pickers, change the error correction level, the size (256, 512, or 1024 px), and the margin from 0 to 8 modules around the code. Changing a color manually deselects the active preset.

Reading QR codes: file, clipboard, or camera

The reader tab accepts three sources: choosing an image file (or dropping one onto the reading area), pasting a copied image, or using the device's rear camera, which checks every frame automatically and stops on its own as soon as it finds a code — no capture button to press. All three process the image locally, without sending it to a server.

Once decoded, the content is classified as Link/URL, WhatsApp, Wi-Fi, vCard, or Text, showing the relevant origin (a link's domain, the Wi-Fi network name, the contact's name) and a specific safety note before any action. An "Open link" button only appears for Link/URL or WhatsApp QR codes — no link ever opens automatically.