What is a QR code?

A QR (Quick Response) code is a two-dimensional barcode that stores data in a grid of small black squares — called modules — on a light background. Unlike a traditional one-dimensional barcode, which only holds a short string of numbers, a QR code can carry a URL, plain text, contact details or other data, and it can be read from any orientation. That omnidirectional, high-capacity design is why QR codes became the default for mobile scanning on menus, packaging, signage, events and business cards.

Why 1024px high-resolution matters

Most free generators hand you a 200–300px image. That looks fine on a phone screen, but it pixelates the moment you scale it up for a poster, menu, product label or flyer. This generator renders at 1024×1024, which means:

• You can print at any size without visible pixelation or jagged module edges.
• The code stays crisp on high-DPI (retina) displays and in documents.
• It remains reliably scannable when reproduced small, or viewed from a distance.

The download is a standard PNG, so it drops straight into any design tool, document or print job — no special format, no watermark.

How QR codes actually work

A QR code is a square grid of modules. The three large squares in the corners are finder patterns — they let a scanner lock on, determine the code’s orientation and scale. The remaining grid carries your data together with error-correction data that lets the code survive damage.

This generator encodes at error-correction level H, the highest of the four standard levels (L, M, Q, H). Level H means the code can still be read even when up to 30% of it is damaged, obscured or covered — a logo, a scuff or a smudge won’t kill the scan. The trade-off is that level H packs slightly less data than level L, so the capacity figures below are quoted at H.

QR code best practices

• Contrast. Keep the modules dark on a light background — this generator uses pure black on white. Low contrast is the single most common cause of failed scans.
• Quiet zone. Leave a clear margin around the code (at least the width of four modules). Don’t crop it tight or place it on a busy background.
• Don’t over-decorate. Heavy logos, rounded corners and colour tricks eat into the error-correction budget and can make a code fail to scan.
• Size for the viewer. For something held close, like a business card, 2–3 cm is plenty. For something viewed from a metre or more — a poster or table tent — go 10 cm or larger.
• Test it. Generate, print, and scan with a real phone camera before you commit to a full run.

What you can encode

This tool encodes in byte mode at error-correction level H, so the practical capacity is:

That comfortably covers a long URL with query parameters, a block of text, or a vCard-style contact string. If your data is longer, split it or shorten the URL first.

Preparing the data

If the text or URL you want to encode contains special characters, the URL Encoder/Decoder will percent-encode it so it lands exactly as intended, and the Base64 tool converts binary or non-text data into a form a QR code can carry.

Nothing on this page leaves your browser: the QR code is generated, rendered and downloaded locally, with no server round-trip and no storage of any kind.