How to Make a QR Code

QR codes are everywhere — on restaurant menus, product packaging, event tickets, and payment screens. A QR code is a two-dimensional barcode that stores text, and any modern phone camera can read it instantly. Making one is free and takes less than a minute.

This guide covers what you can put in a QR code, how to generate one step by step, and the practices that make the difference between a code that scans first try and one that doesn't.

What is a QR code?

QR stands for Quick Response. Developed in 1994 by Denso Wave for tracking car parts, the format packs data into a grid of black-and-white "modules" that a scanner reads in two dimensions — so it holds far more than the one-dimensional barcodes on groceries.

Two features made it so widely adopted. First, built-in error correction means a code can still scan even if part of it is dirty or damaged. Second, phone cameras have read them natively for years — no separate app required.

What you can put in a QR code

A QR code is just text, so the possibilities are broad. The most common uses:

• A link or URL — the most common case, from product pages to event registration.
• Plain text — serial numbers, instructions, or a short message.
• Wi-Fi credentials — scan to join a network without typing the password.
• Contact info (vCard) — scan to add someone to your contacts.
• An email address or phone number — scan to compose an email or place a call.

One trade-off to keep in mind: the more data you pack in, the denser the code and the harder it is to scan at small sizes. Keep URLs as short as you can. (Related: what URL encoding is and why special characters in links matter.)

How to make a QR code

Here's how to generate one with our free QR Code Generator:

• 1.Open the generator and type or paste your content — a URL, text, or a Wi-Fi string.
• 2.Choose a size (200–500 px) and a margin. A larger code scans more reliably, especially in print.
• 3.Click Generate QR Code, then Download to save it as a PNG or JPEG.

Like every Tool Vault tool, generation happens entirely in your browser — your content is never uploaded or stored.

QR code best practices

• Size it for the medium. Print at least 2 × 2 cm (about 300 px). For screens, 300 px or more keeps scanning snappy.
• Keep high contrast. Dark modules on a light background. Avoid inverted or low-contrast colors, which many scanners struggle with.
• Leave a quiet zone. A margin of empty space around the code helps scanners distinguish it from surrounding content.
• Test-scan before you print. A 10-second check beats reprinting a batch of flyers.

Static vs. dynamic QR codes

There are two kinds of QR codes, and they behave very differently:

• Static — the destination is encoded directly into the code. It never expires and can't be edited after printing. This is what a free generator produces.
• Dynamic — the code points to a short redirect URL managed by a service, so you can change the destination and count scans later. Useful, but it depends on the service staying alive (and usually costs a subscription).

For most one-off uses — a menu, a link on a poster, a Wi-Fi sign — a static code is all you need.

Frequently asked questions