Online QR Code Generator Tool

1. 1

   Choose a content type

   Pick what the code should carry: a link, plain text, an email, a phone number, an SMS, Wi-Fi credentials, a contact card, a WhatsApp message, a map location, a calendar event or a crypto payment request.

2. 2

   Fill in the fields

   Each type shows only the fields it needs, and the encoded string appears underneath so you can see exactly what the code will carry. Special characters in Wi-Fi passwords and contact cards are escaped for you.

3. 3

   Style it

   Choose a preset or set the module shape, finder style, frame, colors and gradients yourself. Add a centre logo if you want one — error correction switches to High automatically.

4. 4

   Check the verdict

   The code is decoded by an independent reader as you edit. The verdict beside it tells you whether it scanned, and names anything that puts it at risk — low contrast, an oversized logo, or an inverted colour pair.

5. 5

   Set the output size

   Work in pixels for screens, or switch to print sizing to set a physical width in millimetres at a chosen DPI and see the resulting module size against the 0.4 mm print floor.

6. 6

   Download

   Export as PNG, JPEG or WebP for screens, or SVG, PDF or EPS for print. Bulk runs arrive as a single ZIP.

QR codes enable quick information sharing, facilitate mobile access, support marketing campaigns, enable contactless interactions, and provide easy data transfer. What separates a code that works from one that fails on a printed flyer is rarely the content — it is the margin, the contrast, the logo and the pixel grid, all of which this tool measures for you rather than leaving you to discover at the print shop.

Benefits of QR Codes

• Quick Access: Instantly access websites, contact info, or data
• Marketing: Use in print materials, business cards, and advertisements
• Contactless: Share WiFi passwords, contact info without typing
• Versatile: Support multiple data types (URL, text, email, phone, WiFi)
• Customizable: Customize colors and size to match your brand
• Permanent: A static code encodes its data in the pattern, so it never expires and depends on no service

QR code generation creates scannable codes that encode data in a two-dimensional pattern. Understanding the process helps you create effective QR codes — and understanding which parts of that pattern are decorative and which are structural is what lets you brand a code without breaking it.

Generation Process

• Select Type: Choose QR code type (URL, text, email, phone, WiFi, vCard and seven more)
• Enter Content: Provide the data to encode; the exact encoded string is shown back to you
• Customize: Adjust size, colors, shapes, error correction level, and quiet zone
• Check: The code is decoded by an independent reader and the verdict shown beside it
• Download: Save as PNG, JPEG, WebP, SVG, PDF or EPS

What is actually in the pattern

Three large squares in the corners are the finder patterns; a reader locates the code by scanning for their distinctive 1:1:3:1:1 run of dark and light. Smaller concentric squares scattered through larger codes are alignment patterns, used to correct for perspective when the code is photographed at an angle. Two alternating lines running between the finders are the timing patterns, which establish the module grid. Everything else is data and error correction — and only that remainder is safe to restyle.

Why shapes are applied to data, not to structure

This tool draws the finder and alignment patterns as whole shapes rather than as individually styled modules. That sounds like a detail and it is the difference between a code that scans and one that does not. Styling an alignment pattern as five separate dots destroys the 1:1:1 ratio a reader scans for, and the effect only appears from version 2 upward, where alignment patterns first exist — so a small test code works perfectly and a real one fails.

Every branding control a QR generator offers is a control that can make the code unreadable. These are the four that actually cause failures, in the order they cause them.

The quiet zone is not a margin you can trim

The standard requires at least four modules of blank space on every side. A reader uses it to find the code's boundary, and without it many scanners simply never see the code at all. The setting here starts at four and cannot go below it. A circular frame needs more than four, because the blank space has to clear the square's diagonal rather than its edges — the tool works that out for you.

Contrast is brightness, not colour

A scanner converts the image to black and white before it looks for anything, so what matters is how far apart the two colours are in luminance. A mid-blue on a mid-red looks obviously readable to a person and is a flat grey field to a threshold filter. The contrast ratio is shown next to the colour pickers; below 3:1 a code is unreliable in anything but perfect light, and below 7:1 it starts failing on print and older cameras.

How large a logo can be

Error correction at level H can rebuild about 30% of the codewords, but a centred hole damages data codewords specifically, so the practical ceiling is lower than the theoretical one. Rather than quote a number, the tool covers the modules behind the logo, decodes the result, and tells you what happened. The advisory turns amber as coverage rises and the verdict turns red if the code stops reading.

Light on dark

Inverting a code — light modules on a dark ground — is a real design choice and most modern phone cameras handle it. A significant number of older scanners and print workflows do not, because the finder search assumes dark on light. The tool flags it rather than refusing it, so the decision stays yours.

The number that decides whether a printed code scans is not the size of the code. It is the size of one module.

Size the module, not the code

A camera has to resolve individual modules. Below roughly 0.4 mm each, a phone at normal reading distance cannot, and the code fails however large the sticker is. This is why a short link at 25 mm is comfortable while a full contact card at the same 25 mm is not: same paper, 29 modules across versus 77. Switch the size control to print, set the finished width, and the module size is shown against that floor.

Whole pixels per module

A raster export has to land on a whole number of pixels per module. At a fractional ratio the module boundaries fall mid-pixel, so the modules come out at uneven widths with soft edges between them, and a reader's sampling grid drifts out of step with the code's. Measured on a large code, every whole-number ratio decoded and several fractional ones did not — including ratios higher than whole-number ones that worked. The tool snaps the drawing to a whole ratio and centres it, so the file is the size you asked for and the grid is exact.

Scan distance

The usual planning rule is ten to one: a code scans from about ten times its own width. A 25 mm code on a business card is meant to be read from around 25 cm; a poster code meant to be read from three metres needs to be about 30 cm across. Treat it as a guideline for choosing a size, not a guarantee — lighting, camera and print quality all move it.

Six formats, in two groups. Rasters are pixels and have a fixed resolution; vectors are instructions and stay sharp at any size.

PNG, JPEG and WebP

PNG is the default and the right answer for almost every screen use: lossless, supports transparency, and a QR code's flat colour compresses extremely well. JPEG is smaller but lossy and has no transparency at all — its compression puts soft ringing around every module edge, which is the last thing a code needs. WebP is lossless here too and usually smaller than PNG. Choose JPEG only when something downstream demands it.

SVG, PDF and EPS

All three are true vector exports built from the same geometry as the on-screen code, not a bitmap in a wrapper. SVG is the web and design-tool format and embeds the logo inside the file so it is self-contained. PDF is what a print shop will accept without question, sized in real millimetres. EPS is what older prepress workflows ask for. Gradients survive in all three as real gradients rather than being flattened to an image.

Transparency and format

PNG, WebP, SVG and PDF can carry a transparent background. JPEG and EPS cannot — neither format has an alpha channel. Asking for one of those with transparency turned on is refused with an explanation rather than silently composited onto white, because a code that looks right on screen and prints a white box over your artwork is worse than an error message.

Understanding these facts helps you create better QR codes.

Key Statistics

• QR codes can store up to 4,296 alphanumeric characters, 7,089 digits, or 2,953 bytes of arbitrary data
• Error correction allows QR codes to be scanned even if partially damaged
• QR codes can encode various data types including URLs, text, and contact information
• Custom colors help QR codes match brand identity
• Higher error correction levels increase QR code complexity but improve reliability
• There are 40 sizes, called versions, from 21×21 modules up to 177×177
• Eight mask patterns exist; the encoder scores all eight and picks the one that scans most reliably

Versions, capacity and error correction

A QR code comes in forty fixed sizes, called versions, from 21×21 modules up to 177×177. The version is chosen automatically: the smallest one that holds your content at the error correction level you picked. Raising error correction does not make the code bigger on paper, but it does add modules, so each module gets smaller — which is why a print job that is already tight can fail after switching from M to H. The readout beside the preview shows the version, the level in force and how much of the capacity is used.

How the content is packed

Digits pack at about 3.3 bits each, uppercase letters and a handful of symbols at 5.5, and anything else at 8 or more. So a code holding a phone number is far smaller than one holding the same number of mixed characters. The encoder splits your content into runs and picks the cheapest packing for each, which is why an all-caps URL often produces a visibly simpler code than the same address in lower case.

Follow these guidelines for optimal QR code results.

• Use appropriate error correction level based on usage (higher for print materials)
• Ensure sufficient contrast between dark and light colors for scanning
• Test QR codes before printing or sharing
• Keep QR codes at least 1cm x 1cm for reliable scanning
• Use high error correction for QR codes that may be damaged or partially obscured
• Keep the quiet zone at four modules or more — never trim it to tighten a layout
• Export vector (SVG, PDF or EPS) for anything that will be printed at more than one size
• Prefer a short link over a long one: less content means fewer modules and a code that scans from further away

Ideal Use Cases

• Marketing: Add QR codes to business cards, flyers, and advertisements
• WiFi Sharing: Generate QR codes for WiFi network credentials
• Contact Info: Create vCard QR codes for easy contact sharing
• Event Management: Use QR codes for event registration and check-in
• Product Information: Link QR codes to product details and reviews
• Bulk Labelling: Generate a code per row from a spreadsheet and get them back as one archive

The free tier is capped on scale, not on capability. Everything that decides whether a code is correct is free; what you pay for is doing more of it at once and at larger sizes.

Free

• Payloads up to 1,000 characters
• All twelve content types
• Every module shape, corner style and frame
• Solid foreground and background colours, with the contrast readout
• Exports up to 1024 px, as PNG or SVG
• The scannability check on every code

Pro

• Payloads up to 2,953 characters — the QR standard's own ceiling, not ours
• Bulk generation from a list or CSV, up to 250 codes, returned as one ZIP
• PDF and EPS for prepress, plus JPEG and WebP
• Linear and radial gradients
• A centre logo, with error correction handled for you
• Print sizing in millimetres at 150, 300 or 600 DPI
• Exports up to 4096 px

A QR generator handles some of the most sensitive short strings anyone types: Wi-Fi passwords, personal phone numbers, home addresses on contact cards, wallet addresses. Most online generators build the image on a server, which means every one of those values is transmitted and, in the ordinary course of running a web service, logged. This tool builds and draws the code on your own device. Nothing is uploaded, and the page keeps working after it has loaded even with the network off — which is also the simplest way to verify the claim.

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