Numarly

QR Code Generator

Turn any link or text into a downloadable QR code, instantly.

What is it?

This tool generates a scannable QR code from any text, URL, or other short string, rendered directly in your browser and downloadable as a PNG image.

Formula Explanation

A QR code encodes data as a grid of black and white squares using Reed–Solomon error correction, which lets scanners read the code correctly even if part of it is damaged or obscured. Higher error correction levels rebuild more of the code from less data, at the cost of a denser, more complex pattern.

Example Calculation

Entering https://example.com produces a QR code that opens that page instantly when scanned with any phone camera.

How to Use

  1. Type or paste the text, link, or data you want to encode.
  2. Choose a size and error correction level.
  3. Optionally customize the foreground and background colors.
  4. Click Download PNG to save the QR code as an image.

Benefits

  • Generates and renders the QR code instantly in your browser — no upload or server round-trip.
  • Supports adjustable error correction, so codes still scan even if printed small or partly covered.
  • Lets you customize colors to match branding while keeping the code scannable.

Use Cases

  • Sharing a website link, Wi-Fi password, or contact card on printed material.
  • Adding a scannable link to business cards, flyers, or product packaging.
  • Linking a physical poster or menu to an online page without typing a long URL.

What Your Result Means

A denser-looking QR code usually means either more data was encoded or a higher error correction level was chosen — both increase the number of squares needed. If the code renders as blank, the input text is too long for the current error correction level; try shortening it or lowering the level.

Tips

  • Keep contrast high between foreground and background colors — low-contrast codes can fail to scan.
  • Use higher error correction (Q or H) if the code will be printed small or may get partially damaged.
  • Test the downloaded code with a real phone camera before printing it at scale.

Common Mistakes

  • Encoding very long text at a high error correction level, which can make the code fail to generate.
  • Choosing background and foreground colors that are too close in contrast for a camera to distinguish.
  • Printing the code too small relative to how far away it will be scanned from.

FAQs

Does this tool store or send my QR code data anywhere?

No, the QR code is generated entirely in your browser — the text you enter is never sent to a server.

What's the maximum amount of text a QR code can hold?

It depends on the error correction level, but a QR code can typically hold a few thousand characters of text or a couple hundred bytes of binary data before it becomes too dense to scan reliably.

Will the downloaded QR code work for printing?

Yes, the PNG download is generated at your selected pixel size, which is suitable for most digital and print use — choose a larger size for high-resolution printing.

Can I encode Wi-Fi credentials or a vCard, not just a URL?

Yes, any text works, including formatted strings like Wi-Fi network configs or vCard contact data — just paste the correctly formatted string into the input.

QR codes are generated locally in your browser and are not stored or transmitted anywhere.

Last updated: July 27, 2026