Generate QR Code Online

How to Generate a QR Code Online

1. Enter Text or URL: Type or paste the content you want to encode into the Text / URL field — a web link, plain text, an email address (mailto:[email protected]), phone number (tel:+15551234567), SMS body (SMSTO:+15551234567:Hello), Wi-Fi credentials (WIFI:T:WPA;S:NetworkName;P:password;;), a vCard 4.0 block, or geographic coordinates (geo:37.7749,-122.4194). The code re-renders as you type.
2. Pick Error Correction: Choose L (Low ~7%), M (Medium ~15%), Q (Quartile ~25%), or H (High ~30%). Higher levels add Reed-Solomon redundancy so the code stays scannable when smudged, cropped, or covered — use H whenever you plan to overlay a logo.
3. Adjust Size and Colors (Optional): Set the Size dropdown (default 256 px) to the pixel dimension you want. Pick Foreground and Background colors; keep contrast high (dark on light scans most reliably) and avoid inverted palettes that some older scanners struggle with.
4. Generate and Download: The code renders client-side in your browser — no upload, no account, no watermark. Right-click to save the PNG, or use the SVG export when you need a vector for print materials that may scale beyond 256 px.

Why Generate a QR Code?

QR (Quick Response) codes are 2D barcodes invented by Denso Wave in 1994 and standardized as ISO/IEC 18004. They store up to 7,089 numeric or 2,953 byte-mode characters in a single black-and-white grid and use Reed-Solomon error correction so a partially damaged code still decodes. iOS 11 (2017) and Android 8 added native scanning to the camera app, which is why a QR on a menu, parking meter, or shipping label "just works" today without a separate reader app.

• Restaurant and retail menus — A static QR linking to a hosted PDF or web menu eliminates printing costs for nightly specials and lets one sticker serve every table. Use H-level error correction since menu QRs get coffee-spilled and finger-smudged.
• Wi-Fi guest access — Encode WIFI:T:WPA;S:GuestNetwork;P:s3cret!;; so visitors connect by scanning instead of typing a 24-character password. iOS and Android both recognize the format natively; escape special characters (\, ;, ,, :, ") with a backslash.
• vCard contact sharing — Embed a vCard 4.0 block (RFC 6350) on a business card so recipients add your name, phone, email, and company to their address book in one scan instead of typing it out.
• Print marketing and packaging — Bridge physical media to a landing page, app-store listing, or promo URL. Apply the 10:1 rule (scan distance ≈ 10× the printed module width); a 2 cm × 2 cm code reads from ~20 cm, an 8 cm × 8 cm code from ~80 cm.
• Event check-in and ticketing — Encode a signed token or short ID so scanners can verify entry at the door without manual lookup. Pair with a hash generator or UUID generator for token creation.
• Operations, asset, and inventory tags — Stick a QR on equipment, file folders, or shelf bins that links to a maintenance log or stock record. Quartile (Q) or High (H) error correction tolerates the scratches and dirt that warehouse tags accumulate.

Static vs Dynamic QR Codes

Property	Static QR (what this tool generates)	Dynamic QR (paid services)
Encoded data	Final URL or payload directly	Short redirect URL pointing to a service
Editable after print	No — data is baked in	Yes — change the redirect target anytime
Requires account / subscription	No	Yes (monthly fee, code dies if subscription lapses)
Tracks scans	No (privacy preserving)	Yes (logs IP, device, time per scan)
Code complexity	Scales with payload length	Always small (short redirect URL)
Best for	Permanent data: Wi-Fi, vCard, fixed URLs, tickets	A/B testing, marketing analytics, frequently-changed links
Failure mode	Works forever if printed correctly	Stops working if the redirect service shuts down

If you need editable content or scan analytics, use a dynamic QR provider (Bitly, QR Code Generator, Beaconstac). For everything else — Wi-Fi, contact cards, permanent URLs, tickets — a static QR like this one is free, lasts forever, and never phones home.

Error Correction Level Quick Guide

Level	Recovery	Capacity at Version 40 (byte mode)	When to pick it
L (Low)	~7%	2,953 chars	Pristine digital display; max payload, no damage expected
M (Medium)	~15%	2,331 chars	Default for clean print; good general-purpose choice
Q (Quartile)	~25%	1,663 chars	Outdoor signage, packaging, surfaces that get dirty or scratched
H (High)	~30%	1,273 chars	Logo overlay, industrial labels, partially-obscured placements

Source: ISO/IEC 18004:2024 capacity tables and the Denso Wave error correction reference. Higher levels trade payload for resilience — H roughly halves capacity vs L but lets the code lose almost a third of its modules.

Common QR Data Format Examples

Type	Format string
URL	https://www.example.com
Plain text	Any UTF-8 string
Email	mailto:[email protected]?subject=Hi&body=Hello
Phone	tel:+15551234567
SMS	SMSTO:+15551234567:Pre-filled message
Wi-Fi (WPA/WPA2)	WIFI:T:WPA;S:NetworkName;P:password;H:false;;
Wi-Fi (open)	WIFI:T:nopass;S:NetworkName;;
Geo location	geo:37.7749,-122.4194
vCard 4.0	BEGIN:VCARD\nVERSION:4.0\nFN:Jane Doe\nTEL:+15551234567\nEMAIL:[email protected]\nEND:VCARD
Calendar event	BEGIN:VEVENT\nSUMMARY:Meeting\nDTSTART:20260601T140000Z\nDTEND:20260601T150000Z\nEND:VEVENT

The double-trailing-semicolon on the Wi-Fi format is required — single semicolon makes most phones prompt for the password instead of connecting.

Frequently Asked Questions

When should I use H-level error correction instead of M?

Pick H (30% recovery) whenever the code will be physically modified or obscured: overlaying a logo, printing on a curved surface (bottles, mugs), exposing it to weather or grease, or producing small print where a single dust speck could blot out several modules. Picking H for a clean digital display wastes capacity — M (15%) is the practical default and matches what most generators emit by default.

What is the difference between a static and a dynamic QR code?

A static QR encodes the final data directly into the code pattern — once printed it cannot be changed, but it works forever and reveals no information back to the creator. A dynamic QR encodes a short redirect URL pointing to a third-party service that forwards visitors to the real destination, which lets the owner edit the target and log scan analytics. Dynamic codes require an active subscription; if the redirect service shuts down or billing lapses, every printed code becomes a dead link. This tool generates static codes only.

Can dynamic QR codes track me when I scan them?

Yes — every scan of a dynamic QR hits the redirect service first, which can log your IP address, approximate location, device, browser, and timestamp before forwarding you to the destination. Static QRs decode entirely on-device and contact only the URL you see, so they cannot track scans by design. If privacy matters (Wi-Fi sharing on a flyer, a personal vCard) prefer static codes.

What is the maximum data a QR code can hold?

The largest standard QR is Version 40 (177 × 177 modules). At the lowest error-correction level (L), it holds 7,089 numeric digits, 4,296 alphanumeric characters, 2,953 bytes (UTF-8), or 1,817 kanji characters per the ISO/IEC 18004 specification. Higher error correction reduces capacity — at H, byte-mode capacity drops to 1,273 characters. Realistic URL payloads stay well under Version 10 (57 × 57 modules) for fast scanning.

What format do Wi-Fi QR codes use?

The de-facto standard is WIFI:T:<auth>;S:<ssid>;P:<password>;H:<hidden>;; where T is WPA (covers WPA/WPA2/WPA3), WEP, or nopass, and H is true for hidden SSIDs. The double semicolon at the end is mandatory — without it most scanners prompt for a password instead of auto-joining. Escape \, ;, ,, :, and " inside the SSID or password with a backslash. Both iOS (since iOS 11) and Android (since 10) recognize the format from the system camera.

How small can I print a QR code and still have it scan reliably?

Apply the 10:1 rule: scan distance ≈ 10× the printed code width. A 2 cm × 2 cm code reads from about 20 cm (smartphone held in hand), 3 cm × 3 cm from arm's length (~30 cm) on a flyer, 8 cm × 8 cm from ~80 cm on a poster, and storefront signage at 30 cm × 30 cm reads from across the street. Keep a "quiet zone" — a blank margin of at least 4 modules — around the code; cropping into it kills scan reliability fast.

Should I export PNG or SVG?

Use SVG for any print job that may be resized (business cards, posters, packaging) — the vector format stays sharp at any scale. Use PNG for fixed-resolution digital use: web pages, emails, slide decks, app screens. Both formats produced here have no watermark and use the colors and size you set. For tighter raster file sizes, run the PNG through a PNG compressor after export.

Is my QR content uploaded to a server?

No. The QR is generated entirely in your browser using client-side JavaScript — the text, URL, Wi-Fi password, or vCard you enter never leaves your machine. You can verify by opening this page, disconnecting from the network, and confirming the code still generates. Pair with a password generator or JSON formatter when you need to compose the payload locally before encoding.

Why does my QR code look denser than the one I generated yesterday?

QR code density is determined by payload length and error-correction level. Adding characters or raising the ECC level forces the encoder to step up to a higher Version (larger module grid). A 30-character URL at M typically fits Version 3 (29 × 29 modules); add UTM parameters that push it to 200 characters and you jump to Version 9 (53 × 53) — same physical size on screen, but each module is smaller and harder to scan at distance. Shorten the URL or drop to Version-appropriate ECC to keep modules large.