QR Code Generator

Create a custom-styled QR code for a link, text, email, phone number, SMS or Wi-Fi network — free, and built entirely in your browser.

1. Choose Content

2. Design

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Error correction was raised automatically so the code still scans with a logo covering its center.

Your QR Code

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What This QR Code Generator Does

A QR (Quick Response) code packs text into a grid of black-and-white squares that a camera can decode in a fraction of a second. This tool builds that grid from whatever you type in — a website address, a plain message, an email, a phone number, an SMS, or a Wi-Fi network — and then lets you restyle how the grid is drawn: the color and shape of the data dots, the shape of the three large corner markers, and an optional logo sitting in the center.

How to create your QR code, step by step

  1. Pick a content type (URL, Text, Email, Phone, SMS or Wi-Fi) and fill in its fields. The code updates live as you type.
  2. Optionally pick a Quick Palette, or set your own Pattern, Corners and Background colors — solid or gradient.
  3. Choose a dot pattern style and a corner style to change the code's overall look.
  4. Optionally upload a logo image to sit in the center. The error correction level is raised automatically so the code stays scannable.
  5. Download the result as PNG, JPEG or SVG.

Choosing an error correction level

Every QR code carries extra, redundant data on top of its actual content specifically so a scanner can still read it if part of the code is dirty, scratched, or covered by a logo. The four standard levels — Low, Medium, Quartile and High — trade code density for how much damage the code can tolerate: Low recovers about 7% of the code, Medium about 15%, Quartile about 25%, and High about 30%. This tool defaults to Quartile, a solid middle ground for a screen or a printed flyer, and automatically switches to High the moment you add a center logo, since the logo itself is effectively "damage" the scanner has to work around.

Styling a QR code without breaking it

A QR scanner only needs to reliably tell dark modules apart from the light background — it doesn't care whether those modules are drawn as squares, dots, or rounded shapes, or whether the color is navy, green, or a gradient. The one rule that actually matters is contrast: keep the pattern noticeably darker than the background. Two similar mid-tones (a medium blue pattern on a medium grey background, for instance) can genuinely confuse a scanner's camera in low light, even though the same colors look fine on a bright screen.

Why this tool never sees your data

Every field on this page — the URL, the Wi-Fi password, the logo image you upload — is read directly by JavaScript running in your own browser and turned into a QR code on your own device. None of it is ever sent to allcaltools or any other server, which is exactly why the page keeps generating codes even if you go offline after it first loads.

Written and reviewed by Last updated

Frequently Asked Questions

Yes — every feature here, including custom colors, pattern styles, corner styles and the center logo, is free with no sign-up, no watermark, and no limit on how many QR codes you generate.

No. The QR code is built entirely in your browser from the values you type in; nothing is sent to allcaltools or anyone else. The tool keeps working even if you lose your internet connection after the page has loaded.

A logo covers part of the code's data cells, and a scanner reconstructs missing cells using built-in error correction. If the error correction level is too low for how much area the logo covers, some scanners can't recover the missing data. This tool automatically raises the level when you add a logo, and keeping the logo modestly sized keeps the code reliably scannable.

They set how much of the code can be damaged, dirty or covered and still scan correctly: Low recovers about 7%, Medium about 15%, Quartile about 25%, and High about 30%. A higher level makes the pattern slightly denser for the same data, so use only as much as you need — except with a logo, where High is the safe choice.

Not if there's enough contrast. Scanners rely on telling dark modules apart from the light background, so keep the pattern color noticeably darker than the background — avoid two similar mid-tones. The dot and corner shape options don't affect scannability on their own; they only restyle how each square module is drawn.

PNG is the best default for most uses — a sharp, lossless image that displays correctly everywhere. JPEG works everywhere too, but its lossy compression can slightly blur the hard edges of a QR code. SVG is a vector file, so it stays perfectly sharp at any size — pick it for print, posters, or importing into a design tool.

The QR standard supports up to about 4,296 alphanumeric characters, but a code carrying that much data becomes extremely dense and hard for phone cameras to scan. For a code people will actually scan, keep the content short — a URL, a short message, or structured data like Wi-Fi credentials — rather than long blocks of text.

Yes — switch the content type to Wi-Fi, enter the network name (SSID), password and encryption type, and the generated code uses the standard Wi-Fi QR format that Android and iOS camera apps recognize natively. Scanning it offers to join the network without anyone typing the password by hand.