Is the QR code generated on your servers?

No. The generator runs entirely in your browser using a JavaScript implementation of the QR encoder. The content you type never leaves the page — no analytics, no logging, no API call.

What's the maximum amount of data I can encode?

About 4,300 alphanumeric characters at error-correction L, dropping to ~1,800 at H. URLs and short text comfortably fit at any level. For very long content, prefer URL-shortened links to keep the code scannable from a phone camera.

Why does my code render with more or fewer squares?

QR codes come in 40 sizes ("versions") from 21×21 to 177×177 modules. The generator picks the smallest version that fits your content at your chosen error-correction level. More data or higher EC → larger version → denser code.

Can I add a logo in the centre?

Yes, but use error-correction H so the code remains scannable even with the centre occluded. Don't cover more than ~25% of the code's area. Paste the SVG into Figma/Illustrator and overlay your logo in the middle.

What format should I download for print?

SVG. It scales to any size without pixelation and prints sharply on any DPI. PNG is fine for screen sharing or social media; for posters and packaging, SVG is the right answer.

Why does the Wi-Fi format have so many semicolons?

It's the ZXing-defined format adopted by iOS and Android: T (type), S (SSID), P (password), each followed by ; and the whole string terminated by ;;. Hidden networks add ;H:true. The double-semicolon at the end is required.

QR Code Generator

QR codes for URLs, Wi-Fi, vCards, or plain text. SVG and PNG. Nothing leaves the page.

The generator below renders QR codes locally using the ISO/IEC 18004 standard. Pick the error-correction level based on how forgiving the print medium needs to be: Low fits more data in a denser code; High lets the code be scanned even when a third of it is occluded by a logo, stain, or print defect. Output is provided as inline SVG (sharpest, smallest, scales infinitely) and as a downloadable PNG.

Content

URLs, plain text, Wi-Fi (WIFI:T:WPA;S:Name;P:Pass;;), vCards (BEGIN:VCARD...). Lower error-correction + shorter content = denser code.

Size

Error correction

Enter content to render a QR code.

How to use

Type or paste the content
Plain URL for a link, raw text for a note, or a structured string for Wi-Fi / vCard (see Examples).
Pick the size and error-correction level
256-1024 px presets cover most use cases. Error correction L/M/Q/H trades data capacity for resilience.
Copy SVG or download PNG
Copy SVG to paste into Figma, Illustrator, or HTML. Download PNG for print or social-media graphics.

Content templates

URL — paste the full URL including https://. Mobile cameras open the link in the default browser when scanned.
Wi-Fi — WIFI:T:WPA;S:NetworkName;P:Password;;. iOS and Android offer to join the network when scanning.
vCard — BEGIN:VCARD\nVERSION:3.0\nFN:Jane Doe\nTEL:+15551234567\nEMAIL:jane@example.com\nEND:VCARD. Scanning adds the contact directly.
SMS — SMSTO:+15551234567:Hello! prefills an SMS to that number.
Email — mailto:hi@example.com?subject=Hi&body=Hello prefills the mail composer.

Error-correction reference

Level	Recovers	Best for
L	~7% damage	On-screen, controlled environment
M	~15% damage	Default. Clean print, well-lit scans.
Q	~25% damage	Outdoor signage, restaurant menus
H	~30% damage	Center-logo overlay, stickers, harsh wear

Frequently asked questions

Is the QR code generated on your servers?: No. The generator runs entirely in your browser using a JavaScript implementation of the QR encoder. The content you type never leaves the page — no analytics, no logging, no API call.
What's the maximum amount of data I can encode?: About 4,300 alphanumeric characters at error-correction L, dropping to ~1,800 at H. URLs and short text comfortably fit at any level. For very long content, prefer URL-shortened links to keep the code scannable from a phone camera.
Why does my code render with more or fewer squares?: QR codes come in 40 sizes ("versions") from 21×21 to 177×177 modules. The generator picks the smallest version that fits your content at your chosen error-correction level. More data or higher EC → larger version → denser code.
Can I add a logo in the centre?: Yes, but use error-correction H so the code remains scannable even with the centre occluded. Don't cover more than ~25% of the code's area. Paste the SVG into Figma/Illustrator and overlay your logo in the middle.
What format should I download for print?: SVG. It scales to any size without pixelation and prints sharply on any DPI. PNG is fine for screen sharing or social media; for posters and packaging, SVG is the right answer.
Why does the Wi-Fi format have so many semicolons?: It's the ZXing-defined format adopted by iOS and Android: T (type), S (SSID), P (password), each followed by ; and the whole string terminated by ;;. Hidden networks add ;H:true. The double-semicolon at the end is required.

About

What's inside a QR code

Three large square "finder patterns" in the corners orient the scanner. Smaller "alignment patterns" handle perspective distortion. The rest is data + Reed-Solomon error-correction bits applied to a masked bitstream. The encoder picks one of eight mask patterns to minimise visual clumping that would hurt readability.

When QR codes fail to scan

Common causes: too-low contrast (light grey on white), aggressive JPEG compression that smears module edges, too small for the data capacity (scan distance × code physical size has a lower bound), or printing across a fold/seam. Use error-correction Q or H whenever the code might be physically damaged.